PHP: file - Manual

<!DOCTYPE html> <html xmlns="http://www.w3.org/1999/xhtml" lang="en"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title>PHP: file - Manual </title> <link rel="icon" type="image/svg+xml" sizes="any" href="https://www.php.net/favicon.svg?v=2"> <link rel="icon" type="image/png" sizes="196x196" href="https://www.php.net/favicon-196x196.png?v=2"> <link rel="icon" type="image/png" sizes="32x32" href="https://www.php.net/favicon-32x32.png?v=2"> <link rel="icon" type="image/png" sizes="16x16" href="https://www.php.net/favicon-16x16.png?v=2"> <link rel="shortcut icon" href="https://www.php.net/favicon.ico?v=2"> <link rel="search" type="application/opensearchdescription+xml" href="http://php.net/phpnetimprovedsearch.src" title="Add PHP.net search"> <link rel="alternate" type="application/atom+xml" href="https://www.php.net/releases/feed.php" title="PHP Release feed"> <link rel="alternate" type="application/atom+xml" 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(Simplified)</option> <option value='help-translate.php'>Other</option> </select> </fieldset> </form> </div> </div><div id="function.file" class="refentry"> <div class="refnamediv"> <h1 class="refname">file</h1> <p class="verinfo">(PHP 4, PHP 5, PHP 7, PHP 8)</p><p class="refpurpose"><span class="refname">file</span> — <span class="dc-title">Reads entire file into an array</span></p> </div> <div class="refsect1 description" id="refsect1-function.file-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="methodname"><strong>file</strong></span>(<span class="methodparam"><span class="type"><a href="language.types.string.php" class="type string">string</a></span> <code class="parameter">$filename</code></span>, <span class="methodparam"><span class="type"><a href="language.types.integer.php" class="type int">int</a></span> <code class="parameter">$flags</code><span class="initializer"> = 0</span></span>, <span class="methodparam"><span class="type"><span class="type"><a href="language.types.null.php" class="type null">?</a></span><span class="type"><a href="language.types.resource.php" class="type resource">resource</a></span></span> <code class="parameter">$context</code><span class="initializer"> = <strong><code><a href="reserved.constants.php#constant.null">null</a></code></strong></span></span>): <span class="type"><span class="type"><a href="language.types.array.php" class="type array">array</a></span>|<span class="type"><a href="language.types.value.php" class="type false">false</a></span></span></div> <p class="para rdfs-comment"> Reads an entire file into an array. </p> <blockquote class="note"><p><strong class="note">Note</strong>: <p class="para"> You can use <span class="function"><a href="function.file-get-contents.php" class="function">file_get_contents()</a></span> to return the contents of a file as a string. </p> </p></blockquote> </div> <div class="refsect1 parameters" id="refsect1-function.file-parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt><code class="parameter">filename</code></dt> <dd> <p class="para"> Path to the file. </p> <div class="tip"><strong class="tip">Tip</strong><p class="simpara">A URL can be used as a filename with this function if the <a href="filesystem.configuration.php#ini.allow-url-fopen" class="link">fopen wrappers</a> have been enabled. See <span class="function"><a href="function.fopen.php" class="function">fopen()</a></span> for more details on how to specify the filename. See the <a href="wrappers.php" class="xref">Supported Protocols and Wrappers</a> for links to information about what abilities the various wrappers have, notes on their usage, and information on any predefined variables they may provide.</p></div> </dd> <dt><code class="parameter">flags</code></dt> <dd> <p class="para"> The optional parameter <code class="parameter">flags</code> can be one, or more, of the following constants: <dl> <dt> <strong><code><a href="filesystem.constants.php#constant.file-use-include-path">FILE_USE_INCLUDE_PATH</a></code></strong> </dt> <dd> <span class="simpara"> Search for the file in the <a href="ini.core.php#ini.include-path" class="link">include_path</a>. </span> </dd> <dt> <strong><code><a href="filesystem.constants.php#constant.file-ignore-new-lines">FILE_IGNORE_NEW_LINES</a></code></strong> </dt> <dd> <span class="simpara"> Omit newline at the end of each array element </span> </dd> <dt> <strong><code><a href="filesystem.constants.php#constant.file-skip-empty-lines">FILE_SKIP_EMPTY_LINES</a></code></strong> </dt> <dd> <span class="simpara"> Skip empty lines </span> </dd> <dt> <strong><code><a href="filesystem.constants.php#constant.file-no-default-context">FILE_NO_DEFAULT_CONTEXT</a></code></strong> </dt> <dd> <span class="simpara"> Don't use the default context </span> </dd> </dl> </p> </dd> <dt><code class="parameter">context</code></dt> <dd> <p class="para">A <a href="stream.contexts.php" class="link">context stream</a> <span class="type"><a href="language.types.resource.php" class="type resource">resource</a></span>.</p> </dd> </dl> </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.file-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the file in an array. Each element of the array corresponds to a line in the file, with the newline still attached. Upon failure, <span class="function"><strong>file()</strong></span> returns <strong><code><a href="reserved.constants.php#constant.false">false</a></code></strong>. </p> <blockquote class="note"><p><strong class="note">Note</strong>: <p class="para"> Each line in the resulting array will include the line ending, unless <strong><code><a href="filesystem.constants.php#constant.file-ignore-new-lines">FILE_IGNORE_NEW_LINES</a></code></strong> is used. </p> </p></blockquote> <blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">If PHP is not properly recognizing the line endings when reading files either on or created by a Macintosh computer, enabling the <a href="filesystem.configuration.php#ini.auto-detect-line-endings" class="link">auto_detect_line_endings</a> run-time configuration option may help resolve the problem.</span></p></blockquote> </div> <div class="refsect1 errors" id="refsect1-function.file-errors"> <h3 class="title">Errors/Exceptions</h3> <p class="simpara"> As of PHP 8.3.0, throws a <span class="exceptionname"><a href="class.valueerror.php" class="exceptionname">ValueError</a></span> if <code class="parameter">flags</code> includes any invalid values, such as <strong><code><a href="filesystem.constants.php#constant.file-append">FILE_APPEND</a></code></strong>. </p> <p class="para"> Emits an <strong><code><a href="errorfunc.constants.php#constant.e-warning">E_WARNING</a></code></strong> level error if the file does not exist. </p> </div> <div class="refsect1 changelog" id="refsect1-function.file-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>8.3.0</td> <td> <span class="exceptionname"><a href="class.valueerror.php" class="exceptionname">ValueError</a></span> is thrown for any invalid values of <code class="parameter">flags</code>. </td> </tr> </tbody> </table> </div> <div class="refsect1 examples" id="refsect1-function.file-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-2269"> <p><strong>Example #1 <span class="function"><strong>file()</strong></span> example</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Get a file into an array. In this example we'll go through HTTP to get<br />// the HTML source of a URL.<br /></span><span style="color: #0000BB">$lines </span><span style="color: #007700">= </span><span style="color: #0000BB">file</span><span style="color: #007700">(</span><span style="color: #DD0000">'http://www.example.com/'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Loop through our array, show HTML source as HTML source; and line numbers too.<br /></span><span style="color: #007700">foreach (</span><span style="color: #0000BB">$lines </span><span style="color: #007700">as </span><span style="color: #0000BB">$line_num </span><span style="color: #007700">=> </span><span style="color: #0000BB">$line</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"Line #<b></span><span style="color: #007700">{</span><span style="color: #0000BB">$line_num</span><span style="color: #007700">}</span><span style="color: #DD0000"></b> : " </span><span style="color: #007700">. </span><span style="color: #0000BB">htmlspecialchars</span><span style="color: #007700">(</span><span style="color: #0000BB">$line</span><span style="color: #007700">) . </span><span style="color: #DD0000">"<br />\n"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">// Using the optional flags parameter<br /></span><span style="color: #0000BB">$trimmed </span><span style="color: #007700">= </span><span style="color: #0000BB">file</span><span style="color: #007700">(</span><span style="color: #DD0000">'somefile.txt'</span><span style="color: #007700">, </span><span style="color: #0000BB">FILE_IGNORE_NEW_LINES </span><span style="color: #007700">| </span><span style="color: #0000BB">FILE_SKIP_EMPTY_LINES</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 notes" id="refsect1-function.file-notes"> <h3 class="title">Notes</h3> <div class="warning"><strong class="warning">Warning</strong><p class="para">When using SSL, Microsoft IIS will violate the protocol by closing the connection without sending a <code class="literal">close_notify</code> indicator. PHP will report this as "SSL: Fatal Protocol Error" when you reach the end of the data. To work around this, the value of <a href="errorfunc.configuration.php#ini.error-reporting" class="link">error_reporting</a> should be lowered to a level that does not include warnings. PHP can detect buggy IIS server software when you open the stream using the <code class="literal">https://</code> wrapper and will suppress the warning. When using <span class="function"><a href="function.fsockopen.php" class="function">fsockopen()</a></span> to create an <code class="literal">ssl://</code> socket, the developer is responsible for detecting and suppressing this warning.</p></div> </div> <div class="refsect1 seealso" id="refsect1-function.file-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li><span class="function"><a href="function.file-get-contents.php" class="function" rel="rdfs-seeAlso">file_get_contents()</a> - Reads entire file into a string</span></li> <li><span class="function"><a href="function.readfile.php" class="function" rel="rdfs-seeAlso">readfile()</a> - Outputs a file</span></li> <li><span class="function"><a href="function.fopen.php" class="function" rel="rdfs-seeAlso">fopen()</a> - Opens file or URL</span></li> <li><span class="function"><a href="function.fsockopen.php" class="function" rel="rdfs-seeAlso">fsockopen()</a> - Open Internet or Unix domain socket connection</span></li> <li><span class="function"><a href="function.popen.php" class="function" rel="rdfs-seeAlso">popen()</a> - Opens process file pointer</span></li> <li><span class="function"><a href="function.include.php" class="function" rel="rdfs-seeAlso">include</a> - include</span></li> <li><span class="function"><a href="function.stream-context-create.php" class="function" rel="rdfs-seeAlso">stream_context_create()</a> - Creates a stream context</span></li> </ul> </p> </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/filesystem/functions/file.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.file%0A%0A---">Report a Bug</a> </div> </div><section id="usernotes"> <div class="head"> <span class="action"><a href="/manual/add-note.php?sect=function.file&repo=en&redirect=https://www.php.net/manual/en/function.file.php">＋<small>add a note</small></a></span> <h3 class="title">User Contributed Notes <span class="count">7 notes</span></h3> </div><div id="allnotes"> <div class="note" id="115500"> <div class="votes"> <div id="Vu115500"> <a href="/manual/vote-note.php?id=115500&page=function.file&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd115500"> <a href="/manual/vote-note.php?id=115500&page=function.file&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V115500" title="59% like this..."> 35 </div> </div> <a href="#115500" class="name"> <strong class="user"><em>Martin K.</em></strong></a><a class="genanchor" href="#115500"> ¶</a><div class="date" title="2014-08-05 04:38"><strong>10 years ago</strong></div> <div class="text" id="Hcom115500"> <div class="phpcode"><code><span class="html">If the file you are reading is in CSV format do not use file(), use fgetcsv(). file() will split the file by each newline that it finds, even newlines that appear within a field (i.e. within quotations).</span></code></div> </div> </div> <div class="note" id="113461"> <div class="votes"> <div id="Vu113461"> <a href="/manual/vote-note.php?id=113461&page=function.file&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd113461"> <a href="/manual/vote-note.php?id=113461&page=function.file&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V113461" title="53% like this..."> 23 </div> </div> <a href="#113461" class="name"> <strong class="user"><em>bingo at dingo dot com</em></strong></a><a class="genanchor" href="#113461"> ¶</a><div class="date" title="2013-10-14 12:36"><strong>11 years ago</strong></div> <div class="text" id="Hcom113461"> <div class="phpcode"><code><span class="html">To write all the lines of the file in other words to read the file line by line you can write the code like this:<br /><span class="default"><?php<br />$names</span><span class="keyword">=</span><span class="default">file</span><span class="keyword">(</span><span class="string">'name.txt'</span><span class="keyword">);<br /></span><span class="comment">// To check the number of lines <br /></span><span class="keyword">echo </span><span class="default">count</span><span class="keyword">(</span><span class="default">$names</span><span class="keyword">).</span><span class="string">'<br>'</span><span class="keyword">;<br />foreach(</span><span class="default">$names </span><span class="keyword">as </span><span class="default">$name</span><span class="keyword">)<br />{<br /> echo </span><span class="default">$name</span><span class="keyword">.</span><span class="string">'<br>'</span><span class="keyword">;<br />}<br /></span><span class="default">?><br /></span><br />this example is so basic to understand how it's working. I hope it will help many beginners.<br /><br />Regards,<br />Bingo</span></code></div> </div> </div> <div class="note" id="94067"> <div class="votes"> <div id="Vu94067"> <a href="/manual/vote-note.php?id=94067&page=function.file&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd94067"> <a href="/manual/vote-note.php?id=94067&page=function.file&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V94067" title="53% like this..."> 15 </div> </div> <a href="#94067" class="name"> <strong class="user"><em>d basin</em></strong></a><a class="genanchor" href="#94067"> ¶</a><div class="date" title="2009-10-14 03:47"><strong>15 years ago</strong></div> <div class="text" id="Hcom94067"> <div class="phpcode"><code><span class="html">this may be obvious, but it took me a while to figure out what I was doing wrong. So I wanted to share. I have a file on my "c:\" drive. How do I file() it? <br /><br />Don't forget the backslash is special and you have to "escape" the backslash i.e. "\\":<br /><br /><span class="default"><?php<br /><br />$lines </span><span class="keyword">= </span><span class="default">file</span><span class="keyword">(</span><span class="string">"C:\\Documents and Settings\\myfile.txt"</span><span class="keyword">);<br /><br />foreach(</span><span class="default">$lines </span><span class="keyword">as </span><span class="default">$line</span><span class="keyword">)<br />{<br /> echo(</span><span class="default">$line</span><span class="keyword">);<br />}<br /><br /></span><span class="default">?></span> <br /><br />hope this helps...</span></code></div> </div> </div> <div class="note" id="105772"> <div class="votes"> <div id="Vu105772"> <a href="/manual/vote-note.php?id=105772&page=function.file&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd105772"> <a href="/manual/vote-note.php?id=105772&page=function.file&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V105772" title="52% like this..."> 8 </div> </div> <a href="#105772" class="name"> <strong class="user"><em>twichi at web dot de</em></strong></a><a class="genanchor" href="#105772"> ¶</a><div class="date" title="2011-09-13 12:33"><strong>13 years ago</strong></div> <div class="text" id="Hcom105772"> <div class="phpcode"><code><span class="html">read from CSV data (file) into an array with named keys<br /><br />... with or without 1st row = header (keys) <br />(see 4th parameter of function call as true / false) <br /><br /><span class="default"><?php <br /></span><span class="comment">// --------------------------------------------------------------<br /><br /></span><span class="keyword">function </span><span class="default">csv_in_array</span><span class="keyword">(</span><span class="default">$url</span><span class="keyword">,</span><span class="default">$delm</span><span class="keyword">=</span><span class="string">";"</span><span class="keyword">,</span><span class="default">$encl</span><span class="keyword">=</span><span class="string">"\""</span><span class="keyword">,</span><span class="default">$head</span><span class="keyword">=</span><span class="default">false</span><span class="keyword">) { <br /> <br /> </span><span class="default">$csvxrow </span><span class="keyword">= </span><span class="default">file</span><span class="keyword">(</span><span class="default">$url</span><span class="keyword">); </span><span class="comment">// ---- csv rows to array ----<br /> <br /> </span><span class="default">$csvxrow</span><span class="keyword">[</span><span class="default">0</span><span class="keyword">] = </span><span class="default">chop</span><span class="keyword">(</span><span class="default">$csvxrow</span><span class="keyword">[</span><span class="default">0</span><span class="keyword">]); <br /> </span><span class="default">$csvxrow</span><span class="keyword">[</span><span class="default">0</span><span class="keyword">] = </span><span class="default">str_replace</span><span class="keyword">(</span><span class="default">$encl</span><span class="keyword">,</span><span class="string">''</span><span class="keyword">,</span><span class="default">$csvxrow</span><span class="keyword">[</span><span class="default">0</span><span class="keyword">]); <br /> </span><span class="default">$keydata </span><span class="keyword">= </span><span class="default">explode</span><span class="keyword">(</span><span class="default">$delm</span><span class="keyword">,</span><span class="default">$csvxrow</span><span class="keyword">[</span><span class="default">0</span><span class="keyword">]); <br /> </span><span class="default">$keynumb </span><span class="keyword">= </span><span class="default">count</span><span class="keyword">(</span><span class="default">$keydata</span><span class="keyword">); <br /> <br /> if (</span><span class="default">$head </span><span class="keyword">=== </span><span class="default">true</span><span class="keyword">) { <br /> </span><span class="default">$anzdata </span><span class="keyword">= </span><span class="default">count</span><span class="keyword">(</span><span class="default">$csvxrow</span><span class="keyword">); <br /> </span><span class="default">$z</span><span class="keyword">=</span><span class="default">0</span><span class="keyword">; <br /> for(</span><span class="default">$x</span><span class="keyword">=</span><span class="default">1</span><span class="keyword">; </span><span class="default">$x</span><span class="keyword"><</span><span class="default">$anzdata</span><span class="keyword">; </span><span class="default">$x</span><span class="keyword">++) { <br /> </span><span class="default">$csvxrow</span><span class="keyword">[</span><span class="default">$x</span><span class="keyword">] = </span><span class="default">chop</span><span class="keyword">(</span><span class="default">$csvxrow</span><span class="keyword">[</span><span class="default">$x</span><span class="keyword">]); <br /> </span><span class="default">$csvxrow</span><span class="keyword">[</span><span class="default">$x</span><span class="keyword">] = </span><span class="default">str_replace</span><span class="keyword">(</span><span class="default">$encl</span><span class="keyword">,</span><span class="string">''</span><span class="keyword">,</span><span class="default">$csvxrow</span><span class="keyword">[</span><span class="default">$x</span><span class="keyword">]); <br /> </span><span class="default">$csv_data</span><span class="keyword">[</span><span class="default">$x</span><span class="keyword">] = </span><span class="default">explode</span><span class="keyword">(</span><span class="default">$delm</span><span class="keyword">,</span><span class="default">$csvxrow</span><span class="keyword">[</span><span class="default">$x</span><span class="keyword">]); <br /> </span><span class="default">$i</span><span class="keyword">=</span><span class="default">0</span><span class="keyword">; <br /> foreach(</span><span class="default">$keydata </span><span class="keyword">as </span><span class="default">$key</span><span class="keyword">) { <br /> </span><span class="default">$out</span><span class="keyword">[</span><span class="default">$z</span><span class="keyword">][</span><span class="default">$key</span><span class="keyword">] = </span><span class="default">$csv_data</span><span class="keyword">[</span><span class="default">$x</span><span class="keyword">][</span><span class="default">$i</span><span class="keyword">]; <br /> </span><span class="default">$i</span><span class="keyword">++;<br /> } <br /> </span><span class="default">$z</span><span class="keyword">++;<br /> }<br /> }<br /> else { <br /> </span><span class="default">$i</span><span class="keyword">=</span><span class="default">0</span><span class="keyword">;<br /> foreach(</span><span class="default">$csvxrow </span><span class="keyword">as </span><span class="default">$item</span><span class="keyword">) { <br /> </span><span class="default">$item </span><span class="keyword">= </span><span class="default">chop</span><span class="keyword">(</span><span class="default">$item</span><span class="keyword">); <br /> </span><span class="default">$item </span><span class="keyword">= </span><span class="default">str_replace</span><span class="keyword">(</span><span class="default">$encl</span><span class="keyword">,</span><span class="string">''</span><span class="keyword">,</span><span class="default">$item</span><span class="keyword">); <br /> </span><span class="default">$csv_data </span><span class="keyword">= </span><span class="default">explode</span><span class="keyword">(</span><span class="default">$delm</span><span class="keyword">,</span><span class="default">$item</span><span class="keyword">); <br /> for (</span><span class="default">$y</span><span class="keyword">=</span><span class="default">0</span><span class="keyword">; </span><span class="default">$y</span><span class="keyword"><</span><span class="default">$keynumb</span><span class="keyword">; </span><span class="default">$y</span><span class="keyword">++) { <br /> </span><span class="default">$out</span><span class="keyword">[</span><span class="default">$i</span><span class="keyword">][</span><span class="default">$y</span><span class="keyword">] = </span><span class="default">$csv_data</span><span class="keyword">[</span><span class="default">$y</span><span class="keyword">]; <br /> }<br /> </span><span class="default">$i</span><span class="keyword">++;<br /> }<br /> }<br /><br />return </span><span class="default">$out</span><span class="keyword">; <br />}<br /><br /></span><span class="comment">// --------------------------------------------------------------<br /><br /></span><span class="default">?><br /></span><br />fuction call with 4 parameters: <br /><br />(1) = the file with CSV data (url / string)<br />(2) = colum delimiter (e.g: ; or | or , ...)<br />(3) = values enclosed by (e.g: ' or " or ^ or ...)<br />(4) = with or without 1st row = head (true/false) <br /><br /><span class="default"><?php<br /><br /></span><span class="comment">// ----- call ------ <br /></span><span class="default">$csvdata </span><span class="keyword">= </span><span class="default">csv_in_array</span><span class="keyword">( </span><span class="default">$yourcsvfile</span><span class="keyword">, </span><span class="string">";"</span><span class="keyword">, </span><span class="string">"\""</span><span class="keyword">, </span><span class="default">true </span><span class="keyword">); <br /></span><span class="comment">// ----------------- <br /><br />// ----- view ------ <br /></span><span class="keyword">echo </span><span class="string">"<pre>\r\n"</span><span class="keyword">; <br /></span><span class="default">print_r</span><span class="keyword">(</span><span class="default">$csvdata</span><span class="keyword">);<br />echo </span><span class="string">"</pre>\r\n"</span><span class="keyword">; <br /></span><span class="comment">// -----------------<br /><br /></span><span class="default">?><br /></span><br />PS: also see: <a href="http://php.net/manual/de/function.fgetcsv.php" rel="nofollow" target="_blank">http://php.net/manual/de/function.fgetcsv.php</a> to read CSV data into an array<br />... and other file-handling methods <br /><br />^</span></code></div> </div> </div> <div class="note" id="123195"> <div class="votes"> <div id="Vu123195"> <a href="/manual/vote-note.php?id=123195&page=function.file&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd123195"> <a href="/manual/vote-note.php?id=123195&page=function.file&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V123195" title="50% like this..."> 0 </div> </div> <a href="#123195" class="name"> <strong class="user"><em>radler63 at hotmail dot com</em></strong></a><a class="genanchor" href="#123195"> ¶</a><div class="date" title="2018-10-04 04:34"><strong>6 years ago</strong></div> <div class="text" id="Hcom123195"> <div class="phpcode"><code><span class="html">My experience is that the function file does uses the cached content if the file has changed....</span></code></div> </div> </div> <div class="note" id="126045"> <div class="votes"> <div id="Vu126045"> <a href="/manual/vote-note.php?id=126045&page=function.file&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd126045"> <a href="/manual/vote-note.php?id=126045&page=function.file&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V126045" title="45% like this..."> -2 </div> </div> <a href="#126045" class="name"> <strong class="user"><em>renanlazarotto at gmail dot com</em></strong></a><a class="genanchor" href="#126045"> ¶</a><div class="date" title="2021-04-28 06:37"><strong>3 years ago</strong></div> <div class="text" id="Hcom126045"> <div class="phpcode"><code><span class="html">Be aware that using file() to count lines can cause OOM on the server as it'll allocate all lines into an array.<br /><br />If you're dealing with files that can have thousands of lines, SplFileObject might be a better idea and with little changes you can get the same result.</span></code></div> </div> </div> <div class="note" id="123893"> <div class="votes"> <div id="Vu123893"> <a href="/manual/vote-note.php?id=123893&page=function.file&vote=up" title="Vote up!" class="usernotes-voteu">up</a> </div> <div id="Vd123893"> <a href="/manual/vote-note.php?id=123893&page=function.file&vote=down" title="Vote down!" class="usernotes-voted">down</a> </div> <div class="tally" id="V123893" title="45% like this..."> -3 </div> </div> <a href="#123893" class="name"> <strong class="user"><em>sheldon at hyperlinked dot com</em></strong></a><a class="genanchor" href="#123893"> ¶</a><div class="date" title="2019-05-29 10:25"><strong>5 years ago</strong></div> <div class="text" id="Hcom123893"> <div class="phpcode"><code><span class="html">As of PHP 5.6 the file(), file_get_contents(), and fopen() functions will return false if you are referencing a source URL that doesn't have a valid SSL certificate. Presumably, you will run into this a lot in your development environments this will drive you crazy. <br /><br />You will need to create a stream context and provide it as an argument to the various file operations to tell it to ignore invalid SSL credentials. <br /><br />$args = array("ssl"=>array("verify_peer"=>false,"verify_peer_name"=>false),"http"=>array('timeout' => 60, 'user_agent' => 'Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.9) Gecko/20071025 Firefox/3.0.0.1'));<br /><br />$context = stream_context_create($args);<br />$httpfile = file($url, false, $context);</span></code></div> </div> </div></div> <div class="foot"><a href="/manual/add-note.php?sect=function.file&repo=en&redirect=https://www.php.net/manual/en/function.file.php">＋<small>add a note</small></a></div> </section> </section> <aside class='layout-menu'> <ul class='parent-menu-list'> <li> <a href="ref.filesystem.php">Filesystem Functions</a> <ul class='child-menu-list'> <li class=""> <a 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