function.date-default-timezone-set.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>Sets the default timezone used by all date/time functions in a script</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.date-default-timezone-get.html">date_default_timezone_get</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.date-format.html">date_format</a></div> <div class="up"><a href="ref.datetime.html">Date/Time Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.date-default-timezone-set" class="refentry"> <div class="refnamediv"> <h1 class="refname">date_default_timezone_set</h1> <p class="verinfo">(PHP 5 >= 5.1.0)</p><p class="refpurpose"><span class="refname">date_default_timezone_set</span> — <span class="dc-title"> Sets the default timezone used by all date/time functions in a script </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>date_default_timezone_set</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$timezone_identifier</tt></span> )</div> <p class="para rdfs-comment"> <b>date_default_timezone_set()</b> sets the default timezone used by all date/time functions. </p> <blockquote><p><b class="note">Note</b>: Since PHP 5.1.0 (when the date/time functions were rewritten), every call to a date/time function will generate a <b><tt>E_NOTICE</tt></b> if the timezone isn't valid, and/or a <b><tt>E_STRICT</tt></b> message if using the system settings or the <var class="varname">TZ</var> environment variable. <br /> </p></blockquote> <p class="para"> Instead of using this function to set the default timezone in your script, you can also use the INI setting <a href="datetime.configuration.html#ini.date.timezone" class="link">date.timezone</a> to set the default timezone. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">timezone_identifier</tt></i></span> <dd> <p class="para"> The timezone identifier, like <i>UTC</i> or <i>Europe/Lisbon</i>. The list of valid identifiers is available in the <a href="timezones.html" class="xref">List of Supported Timezones</a>. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> This function returns <b><tt>FALSE</tt></b> if the <i><tt class="parameter">timezone_identifier</tt></i> isn't valid, or <b><tt>TRUE</tt></b> otherwise. </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">5.1.2</td> <td colspan="1" rowspan="1" align="left"> The function started to validate the <i><tt class="parameter">timezone_identifier</tt></i> parameter. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.date-default-timezone-get.html" class="function" rel="rdfs-seeAlso">date_default_timezone_get()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.date-default-timezone-get.html">date_default_timezone_get</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.date-format.html">date_format</a></div> <div class="up"><a href="ref.datetime.html">Date/Time 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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