📄 function.phpinfo.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Outputs lots of PHP information</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.phpcredits.html">phpcredits</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.phpversion.html">phpversion</a></div> <div class="up"><a href="ref.info.html">PHP Options/Info Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.phpinfo" class="refentry"> <div class="refnamediv"> <h1 class="refname">phpinfo</h1> <p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">phpinfo</span> — <span class="dc-title">Outputs lots of PHP information</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>phpinfo</b></b></span> ([ <span class="methodparam"><span class="type">int</span> <tt class="parameter">$what</tt></span> ] )</div> <p class="para rdfs-comment"> Outputs a large amount of information about the current state of PHP. This includes information about PHP compilation options and extensions, the PHP version, server information and environment (if compiled as a module), the PHP environment, OS version information, paths, master and local values of configuration options, HTTP headers, and the PHP License. </p> <p class="para"> Because every system is setup differently, <b>phpinfo()</b> is commonly used to check <a href="configuration.html" class="link">configuration settings</a> and for available <a href="language.variables.predefined.html" class="link">predefined variables</a> on a given system. </p> <p class="para"> <b>phpinfo()</b> is also a valuable debugging tool as it contains all EGPCS (Environment, GET, POST, Cookie, Server) data. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">what</tt></i></span> <dd> <p class="para"> The output may be customized by passing one or more of the following <em class="emphasis">constants</em> bitwise values summed together in the optional <i><tt class="parameter">what</tt></i> parameter. One can also combine the respective constants or bitwise values together with the <a href="language.operators.bitwise.html" class="link">or</a> operator. </p> <p class="para"> <table border="5"> <caption><b><b>phpinfo()</b> options</b></caption> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Name (constant)</th> <th colspan="1">Value</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">INFO_GENERAL</td> <td colspan="1" rowspan="1" align="left">1</td> <td colspan="1" rowspan="1" align="left"> The configuration line, <var class="filename">php.ini</var> location, build date, Web Server, System and more. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">INFO_CREDITS</td> <td colspan="1" rowspan="1" align="left">2</td> <td colspan="1" rowspan="1" align="left"> PHP Credits. See also <a href="function.phpcredits.html" class="function">phpcredits()</a>. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">INFO_CONFIGURATION</td> <td colspan="1" rowspan="1" align="left">4</td> <td colspan="1" rowspan="1" align="left"> Current Local and Master values for PHP directives. See also <a href="function.ini-get.html" class="function">ini_get()</a>. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">INFO_MODULES</td> <td colspan="1" rowspan="1" align="left">8</td> <td colspan="1" rowspan="1" align="left"> Loaded modules and their respective settings. See also <a href="function.get-loaded-extensions.html" class="function">get_loaded_extensions()</a>. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">INFO_ENVIRONMENT</td> <td colspan="1" rowspan="1" align="left">16</td> <td colspan="1" rowspan="1" align="left"> Environment Variable information that's also available in <var class="varname"><a href="reserved.variables.environment.html" class="classname">$_ENV</a></var>. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">INFO_VARIABLES</td> <td colspan="1" rowspan="1" align="left">32</td> <td colspan="1" rowspan="1" align="left"> Shows all <a href="language.variables.predefined.html" class="link"> predefined variables</a> from EGPCS (Environment, GET, POST, Cookie, Server). </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">INFO_LICENSE</td> <td colspan="1" rowspan="1" align="left">64</td> <td colspan="1" rowspan="1" align="left"> PHP License information. See also the <a href="http://www.php.net/license/" class="link external">» license FAQ</a>. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">INFO_ALL</td> <td colspan="1" rowspan="1" align="left">-1</td> <td colspan="1" rowspan="1" align="left"> Shows all of the above. This is the default value. </td> </tr> </tbody> </colgroup> </table> </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 changelog"> <h3 class="title">ChangeLog</h3> <p class="para"> <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Version</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">5.2.2</td> <td colspan="1" rowspan="1" align="left"> The "Loaded Configuration File" information was added, when before only "Configuration File (php.ini) Path" existed. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>phpinfo()</b> Example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /><br /></span><span style="color: #FF8000">// Show all information, defaults to INFO_ALL<br /></span><span style="color: #0000BB">phpinfo</span><span style="color: #007700">();<br /><br /></span><span style="color: #FF8000">// Show just the module information.<br />// phpinfo(8) yields identical results.<br /></span><span style="color: #0000BB">phpinfo</span><span style="color: #007700">(</span><span style="color: #0000BB">INFO_MODULES</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <blockquote><p><b class="note">Note</b>: Parts of the information displayed are disabled when the <a href="ini.core.html#ini.expose-php" class="link">expose_php</a> configuration setting is set to <i>off</i>. This includes the PHP and Zend logos, and the credits. <br /> </p></blockquote> <blockquote><p><b class="note">Note</b>: <b>phpinfo()</b> outputs plain text instead of HTML when using the CLI mode. <br /> </p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.phpversion.html" class="function" rel="rdfs-seeAlso">phpversion()</a></li> <li class="member"><a href="function.phpcredits.html" class="function" rel="rdfs-seeAlso">phpcredits()</a></li> <li class="member"><a href="function.php-logo-guid.html" class="function" rel="rdfs-seeAlso">php_logo_guid()</a></li> <li class="member"><a href="function.ini-get.html" class="function" rel="rdfs-seeAlso">ini_get()</a></li> <li class="member"><a href="function.ini-set.html" class="function" rel="rdfs-seeAlso">ini_set()</a></li> <li class="member"><a href="function.get-loaded-extensions.html" class="function" rel="rdfs-seeAlso">get_loaded_extensions()</a></li> <li class="member"><a href="language.variables.predefined.html" class="link">Predefined Variables</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.phpcredits.html">phpcredits</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.phpversion.html">phpversion</a></div> <div class="up"><a href="ref.info.html">PHP Options/Info Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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