PHP: getimagesize

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class="refname">getimagesize</h1> (PHP 4, PHP 5, PHP 7, PHP 8)getimagesize — Get the size of an image </div> <div class="refsect1 description" id="refsect1-function.getimagesize-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> getimagesize(<a href="language.types.string.php" class="type string">string</a> <code class="parameter">$filename</code>, <a href="language.types.array.php" class="type array">array</a> <code class="parameter reference">&$image_info</code> = <code><a href="reserved.constants.php#constant.null">null</a></code>): <a href="language.types.array.php" class="type array">array</a>|<a href="language.types.value.php" class="type false">false</a></div> The getimagesize() function will determine the size of any supported given image file and return the dimensions along with the file type and a <code class="literal">height/width</code> text string to be used inside a normal <abbr title="Hyper Text Markup Language">HTML</abbr> <code class="tag">IMG</code> tag and the correspondent <abbr title="Hypertext Transfer Protocol">HTTP</abbr> content type. getimagesize() can also return some more information in <code class="parameter">image_info</code> parameter. <div class="caution">Caution This function expects <code class="parameter">filename</code> to be a valid image file. If a non-image file is supplied, it may be incorrectly detected as an image and the function will return successfully, but the array may contain nonsensical values. Do not use getimagesize() to check that a given file is a valid image. Use a purpose-built solution such as the <a href="book.fileinfo.php" class="link">Fileinfo</a> extension instead. </div> <blockquote class="note">Note: Note that JPC and JP2 are capable of having components with different bit depths. In this case, the value for "bits" is the highest bit depth encountered. Also, JP2 files may contain <code class="literal">multiple JPEG 2000 codestreams</code>. In this case, getimagesize() returns the values for the first codestream it encounters in the root of the file. </blockquote> <blockquote class="note">Note: The information about icons are retrieved from the icon with the highest bitrate. </blockquote> <blockquote class="note">Note: GIF images consist of one or more frames, where each frame may only occupy part of the image. The size of the image which is reported by getimagesize() is the overall size (read from the logical screen descriptor). </blockquote> </div> <div class="refsect1 parameters" id="refsect1-function.getimagesize-parameters"> <h3 class="title">Parameters</h3> <dl> <dt><code class="parameter">filename</code></dt> <dd> This parameter specifies the file you wish to retrieve information about. It can reference a local file or (configuration permitting) a remote file using one of the <a href="wrappers.php" class="link">supported streams</a>. </dd> <dt><code class="parameter">image_info</code></dt> <dd> This optional parameter allows you to extract some extended information from the image file. Currently, this will return the different <abbr>JPG</abbr> APP markers as an associative array. Some programs use these APP markers to embed text information in images. A very common one is to embed <a href="http://www.iptc.org/" class="link external">» IPTC</a> information in the APP13 marker. You can use the <a href="function.iptcparse.php" class="function">iptcparse()</a> function to parse the binary APP13 marker into something readable. <blockquote class="note">Note: The <code class="parameter">image_info</code> only supports <abbr>JFIF</abbr> files. </blockquote> </dd> </dl> </div> <div class="refsect1 returnvalues" id="refsect1-function.getimagesize-returnvalues"> <h3 class="title">Return Values</h3> Returns an array with up to 7 elements. Not all image types will include the <code class="literal">channels</code> and <code class="literal">bits</code> elements. Index 0 and 1 contains respectively the width and the height of the image. <blockquote class="note">Note: Some formats may contain no image or may contain multiple images. In these cases, getimagesize() might not be able to properly determine the image size. getimagesize() will return zero for width and height in these cases. </blockquote> Index 2 is one of the <code><a href="image.constants.php#constant.imagetype-gif">IMAGETYPE_*</a></code> constants indicating the type of the image. Index 3 is a text string with the correct <code class="literal">height="yyy" width="xxx"</code> string that can be used directly in an <abbr>IMG</abbr> tag. <code class="literal">mime</code> is the correspondant MIME type of the image. This information can be used to deliver images with the correct HTTP <code class="literal">Content-type</code> header: <div class="example" id="example-2718"> Example #1 getimagesize() and MIME types <div class="example-contents"> <div class="phpcode"><code><?php $size = getimagesize($filename); $fp = fopen($filename, "rb"); if ($size && $fp) { header("Content-type: {$size['mime']}"); fpassthru($fp); exit; } else { // error } ?></code></div> </div> </div> <code class="literal">channels</code> will be 3 for RGB pictures and 4 for CMYK pictures. <code class="literal">bits</code> is the number of bits for each color. For some image types, the presence of <code class="literal">channels</code> and <code class="literal">bits</code> values can be a bit confusing. As an example, <abbr title="Graphic Interchange Format">GIF</abbr> always uses 3 channels per pixel, but the number of bits per pixel cannot be calculated for an animated <abbr title="Graphic Interchange Format">GIF</abbr> with a global color table. On failure, <code><a href="reserved.constants.php#constant.false">false</a></code> is returned. </div> <div class="refsect1 errors" id="refsect1-function.getimagesize-errors"> <h3 class="title">Errors/Exceptions</h3> If accessing the <code class="parameter">filename</code> image is impossible getimagesize() will generate an error of level <code><a href="errorfunc.constants.php#constant.e-warning">E_WARNING</a></code>. On read error, getimagesize() will generate an error of level <code><a href="errorfunc.constants.php#constant.e-notice">E_NOTICE</a></code>. </div> <div class="refsect1 changelog" id="refsect1-function.getimagesize-changelog"> <h3 class="title">Changelog</h3> <table class="doctable informaltable"> <thead> <tr> <th>Version</th> <th>Description</th> </tr> </thead> <tbody class="tbody"> <tr> <td>8.2.0</td> <td> Now returns the actual image dimensions, bits and channels of AVIF images; previously, the dimensions were reported as <code class="literal">0x0</code>, and bits and channels were not reported at all. </td> </tr> <tr> <td>7.1.0</td> <td> Added WebP support. </td> </tr> </tbody> </table> </div> <div class="refsect1 examples" id="refsect1-function.getimagesize-examples"> <h3 class="title">Examples</h3> <div class="example" id="example-2719"> Example #2 getimagesize() example <div class="example-contents"> <div class="phpcode"><code><?php list($width, $height, $type, $attr) = getimagesize("img/flag.jpg"); echo "<img src=\"img/flag.jpg\" $attr alt=\"getimagesize() example\" />"; ?></code></div> </div> </div> <div class="example" id="example-2720"> Example #3 getimagesize (URL) <div class="example-contents"> <div class="phpcode"><code><?php $size = getimagesize("http://www.example.com/gifs/logo.gif"); // if the file name has space in it, encode it properly $size = getimagesize("http://www.example.com/gifs/lo%20go.gif"); ?></code></div> </div> </div> <div class="example" id="example-2721"> Example #4 getimagesize() returning IPTC <div class="example-contents"> <div class="phpcode"><code><?php $size = getimagesize("testimg.jpg", $info); if (isset($info["APP13"])) { $iptc = iptcparse($info["APP13"]); var_dump($iptc); } ?></code></div> </div> </div> </div> <div class="refsect1 notes" id="refsect1-function.getimagesize-notes"> <h3 class="title">Notes</h3> <blockquote class="note">Note: This function does not require the GD image library.</blockquote> </div> <div class="refsect1 seealso" id="refsect1-function.getimagesize-seealso"> <h3 class="title">See Also</h3> <ul class="simplelist"> <li><a href="function.image-type-to-mime-type.php" class="function" rel="rdfs-seeAlso">image_type_to_mime_type()</a> - Get Mime-Type for image-type returned by getimagesize, exif_read_data, exif_thumbnail, exif_imagetype</li> <li><a href="function.exif-imagetype.php" class="function" rel="rdfs-seeAlso">exif_imagetype()</a> - Determine the type of an image</li> <li><a href="function.exif-read-data.php" class="function" rel="rdfs-seeAlso">exif_read_data()</a> - Reads the EXIF headers from an image file</li> <li><a href="function.exif-thumbnail.php" class="function" rel="rdfs-seeAlso">exif_thumbnail()</a> - Retrieve the embedded thumbnail of an image</li> <li><a href="function.imagesx.php" class="function" rel="rdfs-seeAlso">imagesx()</a> - Get image width</li> <li><a href="function.imagesy.php" class="function" rel="rdfs-seeAlso">imagesy()</a> - Get image height</li> </ul> </div> </div> <div class="contribute"> <h3 class="title">Found A Problem?</h3> <div> </div> <div class="edit-bug"> <a href="https://github.com/php/doc-base/blob/master/README.md" title="This will take you to our contribution guidelines on GitHub" target="_blank" rel="noopener noreferrer">Learn How To Improve This Page</a> • <a href="https://github.com/php/doc-en/blob/master/reference/image/functions/getimagesize.xml">Submit a Pull Request</a> • <a href="https://github.com/php/doc-en/issues/new?body=From%20manual%20page:%20https:%2F%2Fphp.net%2Ffunction.getimagesize%0A%0A---">Report a Bug</a> </div> </div><section id="usernotes"> <div class="head"> <a href="/manual/add-note.php?sect=function.getimagesize&repo=en&redirect=https://www.php.net/manual/en/function.getimagesize.php">＋add a note</a> <h3 class="title">User Contributed Notes 24 notes</h3> </div><div id="allnotes"> <div class="note" id="88793"> <div class="votes"> <div id="Vu88793"> <a href="/manual/vote-note.php?id=88793&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd88793"> <a href="/manual/vote-note.php?id=88793&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V88793" title="72% like this..."> 89 </div> </div> <a href="#88793" class="name"> james dot relyea at zifiniti dot com</a><a class="genanchor" href="#88793"> ¶</a><div class="date" title="2009-02-07 08:49">15 years ago</div> <div class="text" id="Hcom88793"> <div class="phpcode"><code>As noted below, getimagesize will download the entire image before it checks for the requested information. This is extremely slow on large images that are accessed remotely. Since the width/height is in the first few bytes of the file, there is no need to download the entire file. I wrote a function to get the size of a JPEG by streaming bytes until the proper data is found to report the width and height: <?php // Retrieve JPEG width and height without downloading/reading entire image. function getjpegsize($img_loc) { $handle = fopen($img_loc, "rb") or die("Invalid file stream."); $new_block = NULL; if(!feof($handle)) { $new_block = fread($handle, 32); $i = 0; if($new_block[$i]=="\xFF" && $new_block[$i+1]=="\xD8" && $new_block[$i+2]=="\xFF" && $new_block[$i+3]=="\xE0") { $i += 4; if($new_block[$i+2]=="\x4A" && $new_block[$i+3]=="\x46" && $new_block[$i+4]=="\x49" && $new_block[$i+5]=="\x46" && $new_block[$i+6]=="\x00") { // Read block size and skip ahead to begin cycling through blocks in search of SOF marker $block_size = unpack("H*", $new_block[$i] . $new_block[$i+1]); $block_size = hexdec($block_size[1]); while(!feof($handle)) { $i += $block_size; $new_block .= fread($handle, $block_size); if($new_block[$i]=="\xFF") { // New block detected, check for SOF marker $sof_marker = array("\xC0", "\xC1", "\xC2", "\xC3", "\xC5", "\xC6", "\xC7", "\xC8", "\xC9", "\xCA", "\xCB", "\xCD", "\xCE", "\xCF"); if(in_array($new_block[$i+1], $sof_marker)) { // SOF marker detected. Width and height information is contained in bytes 4-7 after this byte. $size_data = $new_block[$i+2] . $new_block[$i+3] . $new_block[$i+4] . $new_block[$i+5] . $new_block[$i+6] . $new_block[$i+7] . $new_block[$i+8]; $unpacked = unpack("H*", $size_data); $unpacked = $unpacked[1]; $height = hexdec($unpacked[6] . $unpacked[7] . $unpacked[8] . $unpacked[9]); $width = hexdec($unpacked[10] . $unpacked[11] . $unpacked[12] . $unpacked[13]); return array($width, $height); } else { // Skip block marker and read block size $i += 2; $block_size = unpack("H*", $new_block[$i] . $new_block[$i+1]); $block_size = hexdec($block_size[1]); } } else { return FALSE; } } } } } return FALSE; } ?></code></div> </div> </div> <div class="note" id="122015"> <div class="votes"> <div id="Vu122015"> <a href="/manual/vote-note.php?id=122015&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd122015"> <a href="/manual/vote-note.php?id=122015&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V122015" title="75% like this..."> 16 </div> </div> <a href="#122015" class="name"> nikolam3244 at gmail dot com</a><a class="genanchor" href="#122015"> ¶</a><div class="date" title="2017-12-12 07:24">6 years ago</div> <div class="text" id="Hcom122015"> <div class="phpcode"><code>There's a code snippet for getting JPEG image dimensions by getting only first few bytes of the file, but it doesn't work for PNG files, so I wrote one. It will download only the first 24 bytes instead of the whole image, and thus being much faster than getimagesize() and it will save bandwidth at the same time: <?php // Retrieve PNG width and height without downloading/reading entire image. function getpngsize( $img_loc ) { $handle = fopen( $img_loc, "rb" ) or die( "Invalid file stream." ); if ( ! feof( $handle ) ) { $new_block = fread( $handle, 24 ); if ( $new_block[0] == "\x89" && $new_block[1] == "\x50" && $new_block[2] == "\x4E" && $new_block[3] == "\x47" && $new_block[4] == "\x0D" && $new_block[5] == "\x0A" && $new_block[6] == "\x1A" && $new_block[7] == "\x0A" ) { if ( $new_block[12] . $new_block[13] . $new_block[14] . $new_block[15] === "\x49\x48\x44\x52" ) { $width = unpack( 'H*', $new_block[16] . $new_block[17] . $new_block[18] . $new_block[19] ); $width = hexdec( $width[1] ); $height = unpack( 'H*', $new_block[20] . $new_block[21] . $new_block[22] . $new_block[23] ); $height = hexdec( $height[1] ); return array( $width, $height ); } } } return false; } ?></code></div> </div> </div> <div class="note" id="113158"> <div class="votes"> <div id="Vu113158"> <a href="/manual/vote-note.php?id=113158&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd113158"> <a href="/manual/vote-note.php?id=113158&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V113158" title="66% like this..."> 16 </div> </div> <a href="#113158" class="name"> tomasz at trejderowski dot pl</a><a class="genanchor" href="#113158"> ¶</a><div class="date" title="2013-09-06 09:47">11 years ago</div> <div class="text" id="Hcom113158"> <div class="phpcode"><code>If you want to "convert" value returned by "getimagesize()" as index "2" into something more human-readable, you may consider using a function like this one: $imageTypeArray = array ( 0=>'UNKNOWN', 1=>'GIF', 2=>'JPEG', 3=>'PNG', 4=>'SWF', 5=>'PSD', 6=>'BMP', 7=>'TIFF_II', 8=>'TIFF_MM', 9=>'JPC', 10=>'JP2', 11=>'JPX', 12=>'JB2', 13=>'SWC', 14=>'IFF', 15=>'WBMP', 16=>'XBM', 17=>'ICO', 18=>'COUNT' ); $size = getimagesize($filename); $size[2] = $imageTypeArray[$size[2]]; Or something similar.</code></div> </div> </div> <div class="note" id="49930"> <div class="votes"> <div id="Vu49930"> <a href="/manual/vote-note.php?id=49930&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd49930"> <a href="/manual/vote-note.php?id=49930&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V49930" title="65% like this..."> 19 </div> </div> <a href="#49930" class="name"> php dot net at dannysauer dot com</a><a class="genanchor" href="#49930"> ¶</a><div class="date" title="2005-02-12 08:23">19 years ago</div> <div class="text" id="Hcom49930"> <div class="phpcode"><code>Note that, if you're going to be a good programmer and use named constatnts (IMAGETYPE_JPEG) rather than their values (2), you want to use the IMAGETYPE variants - IMAGETYPE_JPEG, IMAGETYPE GIF, IMAGETYPE_PNG, etc. For some reason, somebody made a horrible decision, and IMG_PNG is actually 4 in my version of PHP, while IMAGETYPE_PNG is 3. It took me a while to figure out why comparing the type against IMG_PNG was failing...</code></div> </div> </div> <div class="note" id="116976"> <div class="votes"> <div id="Vu116976"> <a href="/manual/vote-note.php?id=116976&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd116976"> <a href="/manual/vote-note.php?id=116976&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V116976" title="64% like this..."> 5 </div> </div> <a href="#116976" class="name"> simon dot waters at surevine dot com</a><a class="genanchor" href="#116976"> ¶</a><div class="date" title="2015-03-30 09:01">9 years ago</div> <div class="text" id="Hcom116976"> <div class="phpcode"><code>Note: getimage size doesn't attempt to validate image file formats It is possible for malformed GIF images to contain PHP and still have valid dimensions. Programmers need to ensure such images are validated by other tools, or never treated as PHP or other executable types (enforcing appropriate extensions, avoiding user controlled renaming, restricting uploaded images to areas of the website where PHP is not enabled). <a href="http://ha.ckers.org/blog/20070604/passing-malicious-php-through-getimagesize/" rel="nofollow" target="_blank">http://ha.ckers.org/blog/20070604/passing-malicious-php-through-getimagesize/</a></code></div> </div> </div> <div class="note" id="77006"> <div class="votes"> <div id="Vu77006"> <a href="/manual/vote-note.php?id=77006&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd77006"> <a href="/manual/vote-note.php?id=77006&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V77006" title="62% like this..."> 4 </div> </div> <a href="#77006" class="name"> redcore at gmail dot com</a><a class="genanchor" href="#77006"> ¶</a><div class="date" title="2007-08-09 02:50">17 years ago</div> <div class="text" id="Hcom77006"> <div class="phpcode"><code>It's always good to check out an image's dimensions while attempting to upload to your server or database...especially if it's going to be displayed on a page that doesn't accomodate images beyond a particular size. <?php $tmpName = $_FILES['userfile']['tmp_name']; list($width, $height, $type, $attr) = getimagesize($tmpName); if($width>275 || $height>275) { die("exceeded image dimension limits."); } ?></code></div> </div> </div> <div class="note" id="105033"> <div class="votes"> <div id="Vu105033"> <a href="/manual/vote-note.php?id=105033&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd105033"> <a href="/manual/vote-note.php?id=105033&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V105033" title="61% like this..."> 3 </div> </div> <a href="#105033" class="name"> utilmind</a><a class="genanchor" href="#105033"> ¶</a><div class="date" title="2011-07-23 03:17">13 years ago</div> <div class="text" id="Hcom105033"> <div class="phpcode"><code>Here is the function which determines whether the PNG image contains alpha or not: <?php function is_alpha_png($fn){ return (ord(@file_get_contents($fn, NULL, NULL, 25, 1)) == 6); } ?> The color type of PNG image is stored at byte offset 25. Possible values of that 25'th byte is: * 0 - greyscale * 2 - RGB * 3 - RGB with palette * 4 - greyscale + alpha * 6 - RGB + alpha</code></div> </div> </div> <div class="note" id="82245"> <div class="votes"> <div id="Vu82245"> <a href="/manual/vote-note.php?id=82245&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd82245"> <a href="/manual/vote-note.php?id=82245&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V82245" title="58% like this..."> 5 </div> </div> <a href="#82245" class="name"> info at alex-lawrence dot com</a><a class="genanchor" href="#82245"> ¶</a><div class="date" title="2008-04-02 05:17">16 years ago</div> <div class="text" id="Hcom82245"> <div class="phpcode"><code>Could be useful (didn´t know where to post it): function getImageErrors( $filename, $type = "", $minWidth = 0, $minHeight = 0, $maxWidth = 0, $maxHeight = 0, $maxFileSize = 0 ) { $errors = array(); if ( file_exists( $filename ) ) { $ending = substr( $filename, strpos( $filename, "." ) ); if ( is_array( $type ) ) { $isTypeOf = false; foreach( $type as $eachtype ) { if ( $ending == $eachtype ) { $isTypeOf = true; } } if ( ! $isTypeOf ) { $errors[ 'type' ] = $ending; } } elseif ( $type != "" ) { if ( $ending != $type ) { $errors[ 'type' ] = $ending; } } $size = getimagesize( $filename ); if ( $size[ 0 ] < $minWidth ) { $errors[ 'minWidth' ] = $size[ 0 ]; } if ( $size[ 1 ] < $minHeight ) { $errors[ 'minHeight' ] = $size[ 1 ]; } if ( ( $maxWidth > $minWidth ) && ( $size[ 0 ] > $maxWidth ) ) { $errors[ 'maxWidth' ] = $size[ 0 ]; } if ( ( $maxHeight > $minHeight ) && ( $size[ 1 ] > $maxHeight ) ) { $errors[ 'maxHeight' ] = $size[ 1 ]; } if ( ( $maxFileSize > 0 ) && ( filesize( $filename ) > $maxFileSize ) ) { $errors[ 'maxFileSize' ] = filesize( $filename ); } } else { $errors[ 'filename' ] = "not existing"; } return ( count( $errors ) > 0 ? $errors : null ); }</code></div> </div> </div> <div class="note" id="103516"> <div class="votes"> <div id="Vu103516"> <a href="/manual/vote-note.php?id=103516&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd103516"> <a href="/manual/vote-note.php?id=103516&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V103516" title="57% like this..."> 3 </div> </div> <a href="#103516" class="name"> Steve</a><a class="genanchor" href="#103516"> ¶</a><div class="date" title="2011-04-17 03:12">13 years ago</div> <div class="text" id="Hcom103516"> <div class="phpcode"><code>The list of defined IMAGETYPE_ constants is on the manual page for exif_imagetype: <a href="http://www.php.net/manual/en/function.exif-imagetype.php" rel="nofollow" target="_blank">http://www.php.net/manual/en/function.exif-imagetype.php</a></code></div> </div> </div> <div class="note" id="81043"> <div class="votes"> <div id="Vu81043"> <a href="/manual/vote-note.php?id=81043&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd81043"> <a href="/manual/vote-note.php?id=81043&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V81043" title="58% like this..."> 2 </div> </div> <a href="#81043" class="name"> shmohel at gmail dot com</a><a class="genanchor" href="#81043"> ¶</a><div class="date" title="2008-02-12 06:27">16 years ago</div> <div class="text" id="Hcom81043"> <div class="phpcode"><code>Rather than making a lengthy function that essentially runs twice (once as width, once as height) I came up with a helpful function that uses variable variables to set a maximum height/width. Hope someone finds this helpful. function scaleimage($location, $maxw=NULL, $maxh=NULL){ $img = @getimagesize($location); if($img){ $w = $img[0]; $h = $img[1]; $dim = array('w','h'); foreach($dim AS $val){ $max = "max{$val}"; if(${$val} > ${$max} && ${$max}){ $alt = ($val == 'w') ? 'h' : 'w'; $ratio = ${$alt} / ${$val}; ${$val} = ${$max}; ${$alt} = ${$val} * $ratio; } } return("<img src='{$location}' alt='image' width='{$w}' height='{$h}' />"); } }</code></div> </div> </div> <div class="note" id="80267"> <div class="votes"> <div id="Vu80267"> <a href="/manual/vote-note.php?id=80267&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd80267"> <a href="/manual/vote-note.php?id=80267&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V80267" title="58% like this..."> 2 </div> </div> <a href="#80267" class="name"> info at personalmis dot com</a><a class="genanchor" href="#80267"> ¶</a><div class="date" title="2008-01-07 04:42">16 years ago</div> <div class="text" id="Hcom80267"> <div class="phpcode"><code>Seems the various ways people are trying to proportionaly scale an image, up or down, could be more straight forward if one remembers ones algebra. The formula is, y = mx, where m is the slope of the line. This is the ratio of y:x or m = y/x. So if... // max values for x and y $y_max = 600; $x_max = 800; // image size $y1 = 2000; $x1 = 3000; // use width for scaling if ($x1 > $x_max) { // find slope $m = $y1/$x1; // set x side to max $x2 = $x_max; // set y side to a proportional size $y2 = $m * $x1; } The new image proportionally scaled will be x2 = 800, y2 = 533 (rounded). To do it from the y side, simply reverse the x's and y's.</code></div> </div> </div> <div class="note" id="94178"> <div class="votes"> <div id="Vu94178"> <a href="/manual/vote-note.php?id=94178&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd94178"> <a href="/manual/vote-note.php?id=94178&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V94178" title="57% like this..."> 2 </div> </div> <a href="#94178" class="name"> geoff at spacevs dot com</a><a class="genanchor" href="#94178"> ¶</a><div class="date" title="2009-10-20 11:22">15 years ago</div> <div class="text" id="Hcom94178"> <div class="phpcode"><code>This function returns the width and height of a JPEG image from a string, allowing the dimensions of images stored in a database to be retrieved without writing them to the disk first, or using "imagecreatefromstring" which is very slow in comparison. <?PHP function getJPEGImageXY($data) { $soi = unpack('nmagic/nmarker', $data); if ($soi['magic'] != 0xFFD8) return false; $marker = $soi['marker']; $data = substr($data, 4); $done = false; while(1) { if (strlen($data) === 0) return false; switch($marker) { case 0xFFC0: $info = unpack('nlength/Cprecision/nY/nX', $data); return array($info['X'], $info['Y']); break; default: $info = unpack('nlength', $data); $data = substr($data, $info['length']); $info = unpack('nmarker', $data); $marker = $info['marker']; $data = substr($data, 2); break; } } } ?> Doing this 10,000 times takes 0.43 seconds, compared with using imagecreatefromstring/imagesx/imagesy which takes around 1.52 seconds to do the same. Do not use this instead of getimagesize when dealing with files, getimagesize is much faster coming in at 0.15 seconds.</code></div> </div> </div> <div class="note" id="81380"> <div class="votes"> <div id="Vu81380"> <a href="/manual/vote-note.php?id=81380&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd81380"> <a href="/manual/vote-note.php?id=81380&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V81380" title="56% like this..."> 2 </div> </div> <a href="#81380" class="name"> cloned at clonedmadman dot com</a><a class="genanchor" href="#81380"> ¶</a><div class="date" title="2008-02-25 02:01">16 years ago</div> <div class="text" id="Hcom81380"> <div class="phpcode"><code>Well, I am making a script which will resize the image when uploaded, however, i am making a multi-uploader, so i came across with a problem: an efficient way of getting a pictures height and width and storing them in an array to resize later. This is what i came up with: <?php $links = array("test1.jpg", "test2.png"); $sizearray = array(); $count = count($links); for($i = 0; $i < $count; $i++) { $size = getimagesize($links[$i]); list($width, $height) = $size; $sizearray[$links[$i]] = array("width" => $width, "height" => $height); } print_r($sizearray); // which will print out: Array ( [test1.jpg] => Array ( [width] => 300 [height] => 400 ) [test2.png] => Array ( [width] => 680 [height] => 100 ) ) ?></code></div> </div> </div> <div class="note" id="42662"> <div class="votes"> <div id="Vu42662"> <a href="/manual/vote-note.php?id=42662&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd42662"> <a href="/manual/vote-note.php?id=42662&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V42662" title="55% like this..."> 2 </div> </div> <a href="#42662" class="name"> diablx at hotmail dot com</a><a class="genanchor" href="#42662"> ¶</a><div class="date" title="2004-05-25 02:36">20 years ago</div> <div class="text" id="Hcom42662"> <div class="phpcode"><code>I'm sorry for they other scripts, but I made one mistake about the image resizing... here is a working script ! <? // Some configuration variables ! $maxWidth = 90; $maxHeight = 90; $maxCols = 8; $webDir = "<a href="https://localhost/images/" rel="nofollow" target="_blank">https://localhost/images/</a>"; $localDir = $_SERVER['DOCUMENT_ROOT']."/images/"; $AutorisedImageType = array ("jpg", "jpeg", "gif", "png"); ?> <center> <table border='1' cellspacing='5' cellpadding='5' style="border-collapse:collapse; border-style: dotted"> <tr> <? // Open localDir $dh = opendir($localDir); while (false !== ($filename = readdir($dh))) { $filesArray[] = $filename; } // Display and resize foreach ($filesArray as $images) { $ext = substr($images, strpos($images, ".")+1, strlen($images)); if( in_array($ext, $AutorisedImageType) ) { list($width, $height, $type, $attr) = @getimagesize( $localDir.$images ); $xRatio = $maxWidth / $width; $yRatio = $maxHeight / $height; if ( ($width <= $maxWidth) && ($height <= $maxHeight) ) { $newWidth = $width; $newHeight = $height; } else if (($xRatio * $height) < $maxHeight) { $newHeight = ceil($xRatio * $height); $newWidth = $maxWidth; } else { $newWidth = ceil($yRatio * $width); $newHeight = $maxHeight; } if($i == $maxCols) { echo "</tr><tr>"; $i = 0; } echo "<td align='center' valign='middle' width='$maxWidth' height='$maxHeight'><img src='".$webDir.$images."' width='$newWidth' height='$newHeight'></td>"; $i++; } } ?> </tr> </table> </center></code></div> </div> </div> <div class="note" id="114601"> <div class="votes"> <div id="Vu114601"> <a href="/manual/vote-note.php?id=114601&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd114601"> <a href="/manual/vote-note.php?id=114601&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V114601" title="53% like this..."> 1 </div> </div> <a href="#114601" class="name"> kazuya</a><a class="genanchor" href="#114601"> ¶</a><div class="date" title="2014-03-11 02:19">10 years ago</div> <div class="text" id="Hcom114601"> <div class="phpcode"><code>i made function img_resize($path,$tmp_name,$new_name,$new_width) this could be useful. <?php $new_file = img_resize("./img/", "test.jpg","copy_test.jpg",300); echo "<IMG src = '$new_file'>"; function img_resize($path,$tmp_name,$new_name,$new_width){ if (!file_exists($path.$filename)){ echo "file not found!"; exit; } if (!is_writable($path)){ echo "error:permission denied!"; exit; } list($width, $height) = getimagesize($path . $tmp_name); $new_height = abs($new_width * $height / $width); $image_p = imagecreatetruecolor($new_width, $new_height); $image = imagecreatefromjpeg($path . $tmp_name); imagecopyresampled($image_p, $image, 0, 0, 0, 0, $new_width, $new_height, $width, $height); imagejpeg($image_p, $path . $new_name); return $path.$new_name; } ?></code></div> </div> </div> <div class="note" id="107537"> <div class="votes"> <div id="Vu107537"> <a href="/manual/vote-note.php?id=107537&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd107537"> <a href="/manual/vote-note.php?id=107537&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V107537" title="52% like this..."> 1 </div> </div> <a href="#107537" class="name"> alexyam at live dot com</a><a class="genanchor" href="#107537"> ¶</a><div class="date" title="2012-02-15 11:30">12 years ago</div> <div class="text" id="Hcom107537"> <div class="phpcode"><code>I wanted to use getimagesize() on .SWF files stored in the database as blob data and couldn't find a simple solution, so I created my own. I am releasing this code under the MIT license to save everyone some time: <?php /* ---------------------------------------------------------------------- PHP Blob Data As File Stream v1.0 (C) 2012 Alex Yam <alexyam@live.com> This code is released under the MIT License. ---------------------------------------------------------------------- [Summary] A simple class for PHP functions to read and write blob data as a file using a stream wrapper. Particularly useful for running getimagesize() to get the width and height of .SWF Flash files that are stored in the database as blob data. Tested on PHP 5.3.10. ---------------------------------------------------------------------- [Usage Example] //Include include('./blob_data_as_file_stream.php'); //Register the stream wrapper stream_wrapper_register("BlobDataAsFileStream", "blob_data_as_file_stream"); //Fetch a .SWF file from the Adobe website and store it into a variable. //Replace this with your own fetch-swf-blob-data-from-database code. $swf_url = '<a href="http://www.adobe.com/swf/software/flash/about/flashAbout_info_small.swf" rel="nofollow" target="_blank">http://www.adobe.com/swf/software/flash/about/flashAbout_info_small.swf</a>'; $swf_blob_data = file_get_contents($swf_url); //Store $swf_blob_data to the data stream blob_data_as_file_stream::$blob_data_stream = $swf_blob_data; //Run getimagesize() on the data stream $swf_info = getimagesize('BlobDataAsFileStream://'); var_dump($swf_info); ---------------------------------------------------------------------- [Usage Output] array(5) { [0]=> int(159) [1]=> int(91) [2]=> int(13) [3]=> string(23) "width="159" height="91"" ["mime"]=> string(29) "application/x-shockwave-flash" } */ class blob_data_as_file_stream { private static $blob_data_position = 0; public static $blob_data_stream = ''; public static function stream_open($path,$mode,$options,&$opened_path){ static::$blob_data_position = 0; return true; } public static function stream_seek($seek_offset,$seek_whence){ $blob_data_length = strlen(static::$blob_data_stream); switch ($seek_whence) { case SEEK_SET: $new_blob_data_position = $seek_offset; break; case SEEK_CUR: $new_blob_data_position = static::$blob_data_position+$seek_offset; break; case SEEK_END: $new_blob_data_position = $blob_data_length+$seek_offset; break; default: return false; } if (($new_blob_data_position >= 0) AND ($new_blob_data_position <= $blob_data_length)){ static::$blob_data_position = $new_blob_data_position; return true; }else{ return false; } } public static function stream_tell(){ return static::$blob_data_position; } public static function stream_read($read_buffer_size){ $read_data = substr(static::$blob_data_stream,static::$blob_data_position,$read_buffer_size); static::$blob_data_position += strlen($read_data); return $read_data; } public static function stream_write($write_data){ $write_data_length=strlen($write_data); static::$blob_data_stream = substr(static::$blob_data_stream,0,static::$blob_data_position). $write_data.substr(static::$blob_data_stream,static::$blob_data_position+=$write_data_length); return $write_data_length; } public static function stream_eof(){ return static::$blob_data_position >= strlen(static::$blob_data_stream); } } ?></code></div> </div> </div> <div class="note" id="52099"> <div class="votes"> <div id="Vu52099"> <a href="/manual/vote-note.php?id=52099&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd52099"> <a href="/manual/vote-note.php?id=52099&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V52099" title="53% like this..."> 1 </div> </div> <a href="#52099" class="name"> ajreading at classixshop dot com</a><a class="genanchor" href="#52099"> ¶</a><div class="date" title="2005-04-21 01:30">19 years ago</div> <div class="text" id="Hcom52099"> <div class="phpcode"><code>A simple piece of code i wrote to proportionally resize an image to a max height and width then display it <?php // Max height and width $max_width = 100; $max_height = 100; // Path to your jpeg $upfile '/path/to/file.jpg'; Header("Content-type: image/jpeg"); $size = GetImageSize($upfile); // Read the size $width = $size[0]; $height = $size[1]; // Proportionally resize the image to the // max sizes specified above $x_ratio = $max_width / $width; $y_ratio = $max_height / $height; if( ($width <= $max_width) && ($height <= $max_height) ) { $tn_width = $width; $tn_height = $height; } elseif (($x_ratio * $height) < $max_height) { $tn_height = ceil($x_ratio * $height); $tn_width = $max_width; } else { $tn_width = ceil($y_ratio * $width); $tn_height = $max_height; } // Increase memory limit to support larger files ini_set('memory_limit', '32M'); // Create the new image! $src = ImageCreateFromJpeg($upfile); $dst = ImageCreateTrueColor($tn_width, $tn_height); ImageCopyResized($dst, $src, 0, 0, 0, 0, $tn_width, $tn_height, $width, $height); ImageJpeg($dst); // Destroy the images ImageDestroy($src); ImageDestroy($dst); ?></code></div> </div> </div> <div class="note" id="121714"> <div class="votes"> <div id="Vu121714"> <a href="/manual/vote-note.php?id=121714&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd121714"> <a href="/manual/vote-note.php?id=121714&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V121714" title="50% like this..."> 0 </div> </div> <a href="#121714" class="name"> freecorvette at gmail dot com</a><a class="genanchor" href="#121714"> ¶</a><div class="date" title="2017-10-03 08:03">7 years ago</div> <div class="text" id="Hcom121714"> <div class="phpcode"><code>For some images, using getimagesize() without the second parameter will return the correct info, but when you add the second parameter it will return false. This is most likely a bug (and it has been reported as such), but meanwhile, if you encounter this problem, a workaround is to use exif_read_data().</code></div> </div> </div> <div class="note" id="102418"> <div class="votes"> <div id="Vu102418"> <a href="/manual/vote-note.php?id=102418&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd102418"> <a href="/manual/vote-note.php?id=102418&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V102418" title="50% like this..."> 0 </div> </div> <a href="#102418" class="name"> Jesus Zamora</a><a class="genanchor" href="#102418"> ¶</a><div class="date" title="2011-02-13 06:20">13 years ago</div> <div class="text" id="Hcom102418"> <div class="phpcode"><code>Returns a array with 4 elements. The 0 index is the width of the image in pixels. The 1 index is the height of the image in pixels. The 2 index is a flag for the image type: 1 = GIF, 2 = JPG, 3 = PNG, 4 = SWF, 5 = PSD, 6 = BMP, 7 = TIFF(orden de bytes intel), 8 = TIFF(orden de bytes motorola), 9 = JPC, 10 = JP2, 11 = JPX, 12 = JB2, 13 = SWC, 14 = IFF, 15 = WBMP, 16 = XBM. The 3 index contains ' height="yyy" width="xxx" '</code></div> </div> </div> <div class="note" id="87188"> <div class="votes"> <div id="Vu87188"> <a href="/manual/vote-note.php?id=87188&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd87188"> <a href="/manual/vote-note.php?id=87188&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V87188" title="50% like this..."> 0 </div> </div> <a href="#87188" class="name"> anonymous</a><a class="genanchor" href="#87188"> ¶</a><div class="date" title="2008-11-23 08:30">16 years ago</div> <div class="text" id="Hcom87188"> <div class="phpcode"><code>Note that if you specify a remote file (via a URL) to check the size of, PHP will first download the remote file to your server. If you're using this function to check the size of user provided image links, this could constitute a security risk. A malicious user could potentially link to a very large image file and cause PHP to download it. I do not know what, if any, file size limits are in place for the download. But suppose the user provided a link to an image that was several gigabytes in size? It would be nice if there were a way to limit the size of the download performed by this function. Hopefully there is already a default with some sensible limits.</code></div> </div> </div> <div class="note" id="51444"> <div class="votes"> <div id="Vu51444"> <a href="/manual/vote-note.php?id=51444&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd51444"> <a href="/manual/vote-note.php?id=51444&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V51444" title="50% like this..."> 0 </div> </div> <a href="#51444" class="name"> mail at soylentgreens dot com</a><a class="genanchor" href="#51444"> ¶</a><div class="date" title="2005-03-30 06:37">19 years ago</div> <div class="text" id="Hcom51444"> <div class="phpcode"><code>How about this for cropping images... <?php $imgfile = "img.jpg"; $cropStartX = 300; $cropStartY = 250; $cropW = 200; $cropH = 200; // Create two images $origimg = imagecreatefromjpeg($imgfile); $cropimg = imagecreatetruecolor($cropW,$cropH); // Get the original size list($width, $height) = getimagesize($imgfile); // Crop imagecopyresized($cropimg, $origimg, 0, 0, $cropStartX, $cropStartY, $width, $height, $width, $height); // TODO: write code to save new image // or, just display it like this: header("Content-type: image/jpeg"); imagejpeg($cropimg); // destroy the images imagedestroy($cropimg); imagedestroy($origimg); ?></code></div> </div> </div> <div class="note" id="84649"> <div class="votes"> <div id="Vu84649"> <a href="/manual/vote-note.php?id=84649&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd84649"> <a href="/manual/vote-note.php?id=84649&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V84649" title="45% like this..."> -1 </div> </div> <a href="#84649" class="name"> user at example dot net</a><a class="genanchor" href="#84649"> ¶</a><div class="date" title="2008-07-23 09:13">16 years ago</div> <div class="text" id="Hcom84649"> <div class="phpcode"><code>When validating images, allways check both, image type *AND* file extension! Because most image types allow sections for comments or other irrelevant data. Those section can be used to infiltrate php code onto the server. If these files are stored as sent by the client, files with a ".php" extension can be executed and do tremendous harm.</code></div> </div> </div> <div class="note" id="80346"> <div class="votes"> <div id="Vu80346"> <a href="/manual/vote-note.php?id=80346&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd80346"> <a href="/manual/vote-note.php?id=80346&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V80346" title="45% like this..."> -1 </div> </div> <a href="#80346" class="name"> pfarthing at hotmail dot com</a><a class="genanchor" href="#80346"> ¶</a><div class="date" title="2008-01-10 03:35">16 years ago</div> <div class="text" id="Hcom80346"> <div class="phpcode"><code>Correction: to find $y2 it should be... // set y side to a proportional size $y2 = $m * $x_max; // not $x1 Thanks Norbert =)</code></div> </div> </div> <div class="note" id="50996"> <div class="votes"> <div id="Vu50996"> <a href="/manual/vote-note.php?id=50996&page=function.getimagesize&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd50996"> <a href="/manual/vote-note.php?id=50996&page=function.getimagesize&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V50996" title="43% like this..."> -2 </div> </div> <a href="#50996" class="name"> Coodiss at w3bbix dot net</a><a class="genanchor" href="#50996"> ¶</a><div class="date" title="2005-03-15 09:51">19 years ago</div> <div class="text" id="Hcom50996"> <div class="phpcode"><code>Heres a easy way to scale images to the <td> that they are in *this is broken up so anyone can understand it :) <? $imageinfo = getimagesize("images/picture.jpg"); $ix=$imageinfo[0]; $iy=$imageinfo[1]; $widthscale = $ix/175; //<TD> WIDTH $heightscale = $iy/175; //<TD> HEIGHT if($widthscale < 1) $nwidth = $ix*$widthscale; else $nwidth = $ix/$widthscale; if($heightscale < 1) $nheight = $iy*$heightscale; else $nheight = $iy/$heightscale; ?></code></div> </div> </div></div> <div class="foot"><a href="/manual/add-note.php?sect=function.getimagesize&repo=en&redirect=https://www.php.net/manual/en/function.getimagesize.php">＋add a note</a></div> </section> </section> <aside class='layout-menu'> <ul class='parent-menu-list'> <li> <a href="ref.image.php">GD and Image Functions</a> <ul class='child-menu-list'> <li class=""> <a href="function.gd-info.php" title="gd_info">gd_info</a> </li> <li class="current"> <a href="function.getimagesize.php" title="getimagesize">getimagesize</a> </li> <li class=""> <a href="function.getimagesizefromstring.php" title="getimagesizefromstring">getimagesizefromstring</a> </li> <li class=""> <a href="function.image-type-to-extension.php" title="image_type_to_extension">image_type_to_extension</a> </li> <li class=""> <a href="function.image-type-to-mime-type.php" title="image_type_to_mime_type">image_type_to_mime_type</a> </li> <li 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