📄 reserved.variables.session.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>Session variables</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="reserved.variables.request.html">$_REQUEST</a></div> <div class="next" style="text-align: right; float: right;"><a href="reserved.variables.environment.html">$_ENV</a></div> <div class="up"><a href="reserved.variables.html">Predefined variables</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="reserved.variables.session" class="refentry"> <div class="refnamediv"> <h1 class="refname">$_SESSION</h1> <h1 class="refname">$HTTP_SESSION_VARS [deprecated]</h1> <p class="refpurpose"><span class="refname">$_SESSION</span> -- <span class="refname">$HTTP_SESSION_VARS [deprecated]</span> — <span class="dc-title">Session variables</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <p class="para"> An associative array containing session variables available to the current script. See the <a href="ref.session.html" class="link">Session functions</a> documentation for more information on how this is used. </p> <p class="simpara"> <var class="varname">$HTTP_SESSION_VARS</var> contains the same initial information, but is not a <a href="language.variables.superglobals.html" class="link">superglobal</a>. (Note that <var class="varname">$HTTP_SESSION_VARS</var> and <var class="varname">$_SESSION</var> are different variables and that PHP handles them as such) </p> </div> <div class="refsect1 changelog"> <h3 class="title">ChangeLog</h3> <p class="para"> <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Version</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">4.1.0</td> <td colspan="1" rowspan="1" align="left"> Introduced <var class="varname">$_SESSION</var> that the deprecated <var class="varname">$HTTP_SESSION_VARS</var>. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <blockquote><p><b class="note">Note</b>: This is a 'superglobal', orautomatic global, variable. This simply means that it is available inall scopes throughout a script. There is no need to do <strong class="command">global $variable;</strong> to access it within functions or methods.<br /></p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.session-start.html" class="function" rel="rdfs-seeAlso">session_start()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="reserved.variables.request.html">$_REQUEST</a></div> <div class="next" style="text-align: right; float: right;"><a href="reserved.variables.environment.html">$_ENV</a></div> <div class="up"><a href="reserved.variables.html">Predefined variables</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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