PHP: Other Basic Extensions

<!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: Other Basic Extensions - 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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href='/manual/en/refs.utilspec.server.php'>Server Specific Extensions</a></dd> <dd><a href='/manual/en/refs.basic.session.php'>Session Extensions</a></dd> <dd><a href='/manual/en/refs.basic.text.php'>Text Processing</a></dd> <dd><a href='/manual/en/refs.basic.vartype.php'>Variable and Type Related Extensions</a></dd> <dd><a href='/manual/en/refs.webservice.php'>Web Services</a></dd> <dd><a href='/manual/en/refs.utilspec.windows.php'>Windows Only Extensions</a></dd> <dd><a href='/manual/en/refs.xml.php'>XML Manipulation</a></dd> <dd><a href='/manual/en/refs.ui.php'>GUI Extensions</a></dd> </dl> <dl> <dt>Keyboard Shortcuts</dt><dt>?</dt> <dd>This help</dd> <dt>j</dt> <dd>Next menu item</dd> <dt>k</dt> <dd>Previous menu item</dd> <dt>g p</dt> <dd>Previous man page</dd> <dt>g n</dt> <dd>Next man page</dd> <dt>G</dt> <dd>Scroll to bottom</dd> <dt>g g</dt> <dd>Scroll to top</dd> <dt>g h</dt> <dd>Goto homepage</dd> <dt>g s</dt> <dd>Goto search<br>(current page)</dd> <dt>/</dt> <dd>Focus search box</dd> </dl></div></nav> <div id="goto"> <div class="search"> <div class="text"></div> <div class="results"><ul></ul></div> </div> </div> <div id="breadcrumbs" class="clearfix"> <div id="breadcrumbs-inner"> <div class="next"> <a href="book.geoip.php"> GeoIP » </a> </div> <div class="prev"> <a href="syncsharedmemory.write.php"> « SyncSharedMemory::write </a> </div> <ul> <li><a href='index.php'>PHP Manual</a></li> <li><a href='funcref.php'>Function Reference</a></li> </ul> </div> </div> <div id="layout" class="clearfix"> <section id="layout-content"> <div class="page-tools"> <div class="change-language"> <form action="/manual/change.php" method="get" id="changelang" name="changelang"> <fieldset> <label for="changelang-langs">Change language:</label> <select onchange="document.changelang.submit()" name="page" id="changelang-langs"> <option value='en/refs.basic.other.php' selected="selected">English</option> <option value='de/refs.basic.other.php'>German</option> <option value='es/refs.basic.other.php'>Spanish</option> <option value='fr/refs.basic.other.php'>French</option> <option value='it/refs.basic.other.php'>Italian</option> <option value='ja/refs.basic.other.php'>Japanese</option> <option value='pt_BR/refs.basic.other.php'>Brazilian Portuguese</option> <option value='ru/refs.basic.other.php'>Russian</option> <option value='tr/refs.basic.other.php'>Turkish</option> <option value='uk/refs.basic.other.php'>Ukrainian</option> <option value='zh/refs.basic.other.php'>Chinese (Simplified)</option> <option value='help-translate.php'>Other</option> </select> </fieldset> </form> </div> </div><div id="refs.basic.other" class="set"> <h1 class="title">Other Basic Extensions</h1> <ul class="chunklist chunklist_set"><li><a href="book.geoip.php">GeoIP</a> — Geo IP Location<ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.geoip.php">Introduction</a></li><li><a href="geoip.setup.php">Installing/Configuring</a></li><li><a href="geoip.constants.php">Predefined Constants</a></li><li><a href="ref.geoip.php">GeoIP Functions</a></li></ul></li><li><a href="book.fann.php">FANN</a> — FANN (Fast Artificial Neural Network)<ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.fann.php">Introduction</a></li><li><a href="fann.setup.php">Installing/Configuring</a></li><li><a href="fann.constants.php">Predefined Constants</a></li><li><a href="fann.examples.php">Examples</a></li><li><a href="ref.fann.php">Fann Functions</a></li><li><a href="class.fannconnection.php">FANNConnection</a> — The FANNConnection class</li></ul></li><li><a href="book.igbinary.php">Igbinary</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.igbinary.php">Introduction</a></li><li><a href="igbinary.setup.php">Installing/Configuring</a></li><li><a href="ref.igbinary.php">Igbinary Functions</a></li></ul></li><li><a href="book.json.php">JSON</a> — JavaScript Object Notation<ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.json.php">Introduction</a></li><li><a href="json.setup.php">Installing/Configuring</a></li><li><a href="json.constants.php">Predefined Constants</a></li><li><a href="class.jsonexception.php">JsonException</a> — The JsonException class</li><li><a href="class.jsonserializable.php">JsonSerializable</a> — The JsonSerializable interface</li><li><a href="ref.json.php">JSON Functions</a></li></ul></li><li><a href="book.simdjson.php">Simdjson</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.simdjson.php">Introduction</a></li><li><a href="simdjson.setup.php">Installing/Configuring</a></li><li><a href="simdjson.constants.php">Predefined Constants</a></li><li><a href="ref.simdjson.php">Simdjson Functions</a></li><li><a href="class.simdjsonexception.php">SimdJsonException</a> — The SimdJsonException class</li><li><a href="class.simdjsonvalueerror.php">SimdJsonValueError</a> — The SimdJsonValueError class</li></ul></li><li><a href="book.lua.php">Lua</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.lua.php">Introduction</a></li><li><a href="lua.setup.php">Installing/Configuring</a></li><li><a href="class.lua.php">Lua</a> — The Lua class</li><li><a href="class.luaclosure.php">LuaClosure</a> — The LuaClosure class</li></ul></li><li><a href="book.luasandbox.php">LuaSandbox</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.luasandbox.php">Introduction</a></li><li><a href="luasandbox.setup.php">Installing/Configuring</a></li><li><a href="reference.luasandbox.differences.php">Differences from Standard Lua</a></li><li><a href="luasandbox.examples.php">Examples</a></li><li><a href="class.luasandbox.php">LuaSandbox</a> — The LuaSandbox class</li><li><a href="class.luasandboxfunction.php">LuaSandboxFunction</a> — The LuaSandboxFunction class</li><li><a href="class.luasandboxerror.php">LuaSandboxError</a> — The LuaSandboxError class</li><li><a href="class.luasandboxerrorerror.php">LuaSandboxErrorError</a> — The LuaSandboxErrorError class</li><li><a href="class.luasandboxfatalerror.php">LuaSandboxFatalError</a> — The LuaSandboxFatalError class</li><li><a href="class.luasandboxmemoryerror.php">LuaSandboxMemoryError</a> — The LuaSandboxMemoryError class</li><li><a href="class.luasandboxruntimeerror.php">LuaSandboxRuntimeError</a> — The LuaSandboxRuntimeError class</li><li><a href="class.luasandboxsyntaxerror.php">LuaSandboxSyntaxError</a> — The LuaSandboxSyntaxError class</li><li><a href="class.luasandboxtimeouterror.php">LuaSandboxTimeoutError</a> — The LuaSandboxTimeoutError class</li></ul></li><li><a href="book.misc.php">Misc.</a> — Miscellaneous Functions<ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.misc.php">Introduction</a></li><li><a href="misc.setup.php">Installing/Configuring</a></li><li><a href="misc.constants.php">Predefined Constants</a></li><li><a href="ref.misc.php">Misc. Functions</a></li><li><a href="changelog.misc.php">Changelog</a></li></ul></li><li><a href="book.random.php">Random</a> — Random Number Generators and Functions Related to Randomness<ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.random.php">Introduction</a></li><li><a href="random.constants.php">Predefined Constants</a></li><li><a href="random.examples.php">Examples</a></li><li><a href="ref.random.php">Random Functions</a></li><li><a href="class.random-randomizer.php">Random\Randomizer</a> — The Random\Randomizer class</li><li><a href="enum.random.intervalboundary.php">Random\IntervalBoundary</a> — The Random\IntervalBoundary Enum</li><li><a href="class.random-engine.php">Random\Engine</a> — The Random\Engine interface</li><li><a href="class.random-cryptosafeengine.php">Random\CryptoSafeEngine</a> — The Random\CryptoSafeEngine interface</li><li><a href="class.random-engine-secure.php">Random\Engine\Secure</a> — The Random\Engine\Secure class</li><li><a href="class.random-engine-mt19937.php">Random\Engine\Mt19937</a> — The Random\Engine\Mt19937 class</li><li><a href="class.random-engine-pcgoneseq128xslrr64.php">Random\Engine\PcgOneseq128XslRr64</a> — The Random\Engine\PcgOneseq128XslRr64 class</li><li><a href="class.random-engine-xoshiro256starstar.php">Random\Engine\Xoshiro256StarStar</a> — The Random\Engine\Xoshiro256StarStar class</li><li><a href="class.random-randomerror.php">Random\RandomError</a> — The Random\RandomError class</li><li><a href="class.random-brokenrandomengineerror.php">Random\BrokenRandomEngineError</a> — The Random\BrokenRandomEngineError class</li><li><a href="class.random-randomexception.php">Random\RandomException</a> — The Random\RandomException class</li></ul></li><li><a href="book.seaslog.php">Seaslog</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.seaslog.php">Introduction</a></li><li><a href="seaslog.setup.php">Installing/Configuring</a></li><li><a href="seaslog.constants.php">Predefined Constants</a></li><li><a href="seaslog.examples.php">Examples</a></li><li><a href="ref.seaslog.php">Seaslog Functions</a></li><li><a href="class.seaslog.php">SeasLog</a> — The SeasLog class</li></ul></li><li><a href="book.spl.php">SPL</a> — Standard PHP Library (SPL)<ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.spl.php">Introduction</a></li><li><a href="spl.datastructures.php">Datastructures</a></li><li><a href="spl.iterators.php">Iterators</a></li><li><a href="spl.interfaces.php">Interfaces</a></li><li><a href="spl.exceptions.php">Exceptions</a></li><li><a href="ref.spl.php">SPL Functions</a></li><li><a href="spl.files.php">File Handling</a></li><li><a href="spl.misc.php">Miscellaneous Classes and Interfaces</a></li></ul></li><li><a href="book.stream.php">Streams</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.stream.php">Introduction</a></li><li><a href="stream.setup.php">Installing/Configuring</a></li><li><a href="stream.constants.php">Predefined Constants</a></li><li><a href="stream.filters.php">Stream Filters</a></li><li><a href="stream.contexts.php">Stream Contexts</a></li><li><a href="stream.errors.php">Stream Errors</a></li><li><a href="stream.examples.php">Examples</a></li><li><a href="class.php-user-filter.php">php_user_filter</a> — The php_user_filter class</li><li><a href="class.streamwrapper.php">streamWrapper</a> — The streamWrapper class</li><li><a href="ref.stream.php">Stream Functions</a></li></ul></li><li><a href="book.swoole.php">Swoole</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.swoole.php">Introduction</a></li><li><a href="swoole.setup.php">Installing/Configuring</a></li><li><a href="swoole.constants.php">Predefined Constants</a></li><li><a href="ref.swoole-funcs.php">Swoole Functions</a></li><li><a href="class.swoole-async.php">Swoole\Async</a> — The Swoole\Async class</li><li><a href="class.swoole-atomic.php">Swoole\Atomic</a> — The Swoole\Atomic class</li><li><a href="class.swoole-buffer.php">Swoole\Buffer</a> — The Swoole\Buffer class</li><li><a href="class.swoole-channel.php">Swoole\Channel</a> — The Swoole\Channel class</li><li><a href="class.swoole-client.php">Swoole\Client</a> — The Swoole\Client class</li><li><a href="class.swoole-connection-iterator.php">Swoole\Connection\Iterator</a> — The Swoole\Connection\Iterator class</li><li><a href="class.swoole-coroutine.php">Swoole\Coroutine</a> — The Swoole\Coroutine class</li><li><a href="class.swoole-event.php">Swoole\Event</a> — The Swoole\Event class</li><li><a href="class.swoole-exception.php">Swoole\Exception</a> — The Swoole\Exception class</li><li><a href="class.swoole-http-client.php">Swoole\Http\Client</a> — The Swoole\Http\Client class</li><li><a href="class.swoole-http-request.php">Swoole\Http\Request</a> — The Swoole\Http\Request class</li><li><a href="class.swoole-http-response.php">Swoole\Http\Response</a> — The Swoole\Http\Response class</li><li><a href="class.swoole-http-server.php">Swoole\Http\Server</a> — The Swoole\Http\Server class</li><li><a href="class.swoole-lock.php">Swoole\Lock</a> — The Swoole\Lock class</li><li><a href="class.swoole-mmap.php">Swoole\Mmap</a> — The Swoole\Mmap class</li><li><a href="class.swoole-mysql.php">Swoole\MySQL</a> — The Swoole\MySQL class</li><li><a href="class.swoole-mysql-exception.php">Swoole\MySQL\Exception</a> — The Swoole\MySQL\Exception class</li><li><a href="class.swoole-process.php">Swoole\Process</a> — The Swoole\Process class</li><li><a href="class.swoole-redis-server.php">Swoole\Redis\Server</a> — The Swoole\Redis\Server class</li><li><a href="class.swoole-serialize.php">Swoole\Serialize</a> — The Swoole\Serialize class</li><li><a href="class.swoole-server.php">Swoole\Server</a> — The Swoole\Server class</li><li><a href="class.swoole-table.php">Swoole\Table</a> — The Swoole\Table class</li><li><a href="class.swoole-timer.php">Swoole\Timer</a> — The Swoole\Timer class</li><li><a href="class.swoole-websocket-frame.php">Swoole\WebSocket\Frame</a> — The Swoole\WebSocket\Frame class</li><li><a href="class.swoole-websocket-server.php">Swoole\WebSocket\Server</a> — The Swoole\WebSocket\Server class</li></ul></li><li><a href="book.tidy.php">Tidy</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.tidy.php">Introduction</a></li><li><a href="tidy.setup.php">Installing/Configuring</a></li><li><a href="tidy.constants.php">Predefined Constants</a></li><li><a href="tidy.examples.php">Examples</a></li><li><a href="class.tidy.php">tidy</a> — The tidy class</li><li><a href="class.tidynode.php">tidyNode</a> — The tidyNode class</li><li><a href="ref.tidy.php">Tidy Functions</a></li></ul></li><li><a href="book.tokenizer.php">Tokenizer</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.tokenizer.php">Introduction</a></li><li><a href="tokenizer.setup.php">Installing/Configuring</a></li><li><a href="tokenizer.constants.php">Predefined Constants</a></li><li><a href="tokenizer.examples.php">Examples</a></li><li><a href="class.phptoken.php">PhpToken</a> — The PhpToken class</li><li><a href="ref.tokenizer.php">Tokenizer Functions</a></li></ul></li><li><a href="book.url.php">URLs</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.url.php">Introduction</a></li><li><a href="url.constants.php">Predefined Constants</a></li><li><a href="ref.url.php">URL Functions</a></li></ul></li><li><a href="book.v8js.php">V8js</a> — V8 Javascript Engine Integration<ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.v8js.php">Introduction</a></li><li><a href="v8js.setup.php">Installing/Configuring</a></li><li><a href="v8js.examples.php">Examples</a></li><li><a href="class.v8js.php">V8Js</a> — The V8Js class</li><li><a href="class.v8jsexception.php">V8JsException</a> — The V8JsException class</li></ul></li><li><a href="book.yaml.php">Yaml</a> — YAML Data Serialization<ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.yaml.php">Introduction</a></li><li><a href="yaml.setup.php">Installing/Configuring</a></li><li><a href="yaml.constants.php">Predefined Constants</a></li><li><a href="yaml.examples.php">Examples</a></li><li><a href="yaml.callbacks.php">Callbacks</a></li><li><a href="ref.yaml.php">Yaml Functions</a></li></ul></li><li><a href="book.yaf.php">Yaf</a> — Yet Another Framework<ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.yaf.php">Introduction</a></li><li><a href="yaf.setup.php">Installing/Configuring</a></li><li><a href="yaf.constants.php">Predefined Constants</a></li><li><a href="yaf.tutorials.php">Examples</a></li><li><a href="yaf.appconfig.php">Application Configuration</a></li><li><a href="class.yaf-application.php">Yaf_Application</a> — The Yaf_Application class</li><li><a href="class.yaf-bootstrap-abstract.php">Yaf_Bootstrap_Abstract</a> — The Yaf_Bootstrap_Abstract class</li><li><a href="class.yaf-dispatcher.php">Yaf_Dispatcher</a> — The Yaf_Dispatcher class</li><li><a href="class.yaf-config-abstract.php">Yaf_Config_Abstract</a> — The Yaf_Config_Abstract class</li><li><a href="class.yaf-config-ini.php">Yaf_Config_Ini</a> — The Yaf_Config_Ini class</li><li><a href="class.yaf-config-simple.php">Yaf_Config_Simple</a> — The Yaf_Config_Simple class</li><li><a href="class.yaf-controller-abstract.php">Yaf_Controller_Abstract</a> — The Yaf_Controller_Abstract class</li><li><a href="class.yaf-action-abstract.php">Yaf_Action_Abstract</a> — The Yaf_Action_Abstract class</li><li><a href="class.yaf-view-interface.php">Yaf_View_Interface</a> — The Yaf_View_Interface class</li><li><a href="class.yaf-view-simple.php">Yaf_View_Simple</a> — The Yaf_View_Simple class</li><li><a href="class.yaf-loader.php">Yaf_Loader</a> — The Yaf_Loader class</li><li><a href="class.yaf-plugin-abstract.php">Yaf_Plugin_Abstract</a> — The Yaf_Plugin_Abstract class</li><li><a href="class.yaf-registry.php">Yaf_Registry</a> — The Yaf_Registry class</li><li><a href="class.yaf-request-abstract.php">Yaf_Request_Abstract</a> — The Yaf_Request_Abstract class</li><li><a href="class.yaf-request-http.php">Yaf_Request_Http</a> — The Yaf_Request_Http class</li><li><a href="class.yaf-request-simple.php">Yaf_Request_Simple</a> — The Yaf_Request_Simple class</li><li><a href="class.yaf-response-abstract.php">Yaf_Response_Abstract</a> — The Yaf_Response_Abstract class</li><li><a href="class.yaf-route-interface.php">Yaf_Route_Interface</a> — The Yaf_Route_Interface class</li><li><a href="class.yaf-route-map.php">Yaf_Route_Map</a> — The Yaf_Route_Map class</li><li><a href="class.yaf-route-regex.php">Yaf_Route_Regex</a> — The Yaf_Route_Regex class</li><li><a href="class.yaf-route-rewrite.php">Yaf_Route_Rewrite</a> — The Yaf_Route_Rewrite class</li><li><a href="class.yaf-router.php">Yaf_Router</a> — The Yaf_Router class</li><li><a href="class.yaf-route-simple.php">Yaf_Route_Simple</a> — The Yaf_Route_Simple class</li><li><a href="class.yaf-route-static.php">Yaf_Route_Static</a> — The Yaf_Route_Static class</li><li><a href="class.yaf-route-supervar.php">Yaf_Route_Supervar</a> — The Yaf_Route_Supervar class</li><li><a href="class.yaf-session.php">Yaf_Session</a> — The Yaf_Session class</li><li><a href="class.yaf-exception.php">Yaf_Exception</a> — The Yaf_Exception class</li><li><a href="class.yaf-exception-typeerror.php">Yaf_Exception_TypeError</a> — The Yaf_Exception_TypeError class</li><li><a href="class.yaf-exception-startuperror.php">Yaf_Exception_StartupError</a> — The Yaf_Exception_StartupError class</li><li><a href="class.yaf-exception-dispatchfailed.php">Yaf_Exception_DispatchFailed</a> — The Yaf_Exception_DispatchFailed class</li><li><a href="class.yaf-exception-routerfailed.php">Yaf_Exception_RouterFailed</a> — The Yaf_Exception_RouterFailed class</li><li><a href="class.yaf-exception-loadfailed.php">Yaf_Exception_LoadFailed</a> — The Yaf_Exception_LoadFailed class</li><li><a href="class.yaf-exception-loadfailed-module.php">Yaf_Exception_LoadFailed_Module</a> — The Yaf_Exception_LoadFailed_Module class</li><li><a href="class.yaf-exception-loadfailed-controller.php">Yaf_Exception_LoadFailed_Controller</a> — The Yaf_Exception_LoadFailed_Controller class</li><li><a href="class.yaf-exception-loadfailed-action.php">Yaf_Exception_LoadFailed_Action</a> — The Yaf_Exception_LoadFailed_Action class</li><li><a href="class.yaf-exception-loadfailed-view.php">Yaf_Exception_LoadFailed_View</a> — The Yaf_Exception_LoadFailed_View class</li></ul></li><li><a href="book.yaconf.php">Yaconf</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.yaconf.php">Introduction</a></li><li><a href="yaconf.setup.php">Installing/Configuring</a></li><li><a href="class.yaconf.php">Yaconf</a> — The Yaconf class</li></ul></li><li><a href="book.taint.php">Taint</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.taint.php">Introduction</a></li><li><a href="taint.setup.php">Installing/Configuring</a></li><li><a href="taint.detail.php">More Details</a></li><li><a href="ref.taint.php">Taint Functions</a></li></ul></li><li><a href="book.ds.php">Data Structures</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.ds.php">Introduction</a></li><li><a href="ds.setup.php">Installing/Configuring</a></li><li><a href="ds.examples.php">Examples</a></li><li><a href="class.ds-collection.php">Ds\Collection</a> — The Collection interface</li><li><a href="class.ds-hashable.php">Ds\Hashable</a> — The Hashable interface</li><li><a href="class.ds-sequence.php">Ds\Sequence</a> — The Sequence interface</li><li><a href="class.ds-vector.php">Ds\Vector</a> — The Vector class</li><li><a href="class.ds-deque.php">Ds\Deque</a> — The Deque class</li><li><a href="class.ds-map.php">Ds\Map</a> — The Map class</li><li><a href="class.ds-pair.php">Ds\Pair</a> — The Pair class</li><li><a href="class.ds-set.php">Ds\Set</a> — The Set class</li><li><a href="class.ds-stack.php">Ds\Stack</a> — The Stack class</li><li><a href="class.ds-queue.php">Ds\Queue</a> — The Queue class</li><li><a href="class.ds-priorityqueue.php">Ds\PriorityQueue</a> — The PriorityQueue class</li></ul></li><li><a href="book.var_representation.php">var_representation</a><ul class="chunklist chunklist_set chunklist_children"><li><a href="intro.var_representation.php">Introduction</a></li><li><a href="var-representation.setup.php">Installing/Configuring</a></li><li><a href="var-representation.constants.php">Predefined Constants</a></li><li><a href="ref.var-representation.php">var_representation Functions</a></li></ul></li></ul></div> <div class="contribute"> <h3 class="title">Improve This Page</h3> <div> </div> <div class="edit-bug"> <a 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PHP: Other Basic Extensions - Manual