<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>Gets the default timezone used by all date/time functions in a script</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.date-date-set.html">date_date_set</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.date-default-timezone-set.html">date_default_timezone_set</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-get" class="refentry"> <div class="refnamediv"> <h1 class="refname">date_default_timezone_get</h1> <p class="verinfo">(PHP 5 >= 5.1.0)</p><p class="refpurpose"><span class="refname">date_default_timezone_get</span> — <span class="dc-title"> Gets the default timezone used by all date/time functions in a script </span></p> </div> <div class="refsect1 description" id="refsect1-function.date-default-timezone-get-description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">string</span> <span class="methodname"><strong>date_default_timezone_get</strong></span> ( <span class="methodparam">void</span> )</div> <p class="para rdfs-comment"> In order of preference, this function returns the default timezone by: <ul class="itemizedlist"> <li class="listitem"> <p class="para"> Reading the timezone set using the <span class="function"><a href="function.date-default-timezone-set.html" class="function">date_default_timezone_set()</a></span> function (if any) </p> </li> <li class="listitem"> <p class="para"> Prior to PHP 5.4.0 <em class="emphasis">only</em>: Reading the <var class="varname"><var class="varname">TZ</var></var> environment variable (if non empty) </p> </li> <li class="listitem"> <p class="para"> Reading the value of the <a href="datetime.configuration.html#ini.date.timezone" class="link">date.timezone</a> ini option (if set) </p> </li> <li class="listitem"> <p class="para"> Prior to PHP 5.4.0 <em class="emphasis">only</em>: Querying the host operating system (if supported and allowed by the OS). This uses an algorithm that has to <em class="emphasis">guess</em> the timezone. This is by no means going to work correctly for every situation. A warning is shown when this stage is reached. Do not rely on it to be guessed correctly, and set <a href="datetime.configuration.html#ini.date.timezone" class="link">date.timezone</a> to the correct timezone instead. </p> </li> </ul> </p> <p class="para"> If none of the above succeed, <span class="methodname"><strong>date_default_timezone_get()</strong></span> will return a default timezone of <em>UTC</em>. </p> </div> <div class="refsect1 returnvalues" id="refsect1-function.date-default-timezone-get-returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns a <span class="type"><a href="language.types.string.html" class="type string">string</a></span>. </p> </div> <div class="refsect1 changelog" id="refsect1-function.date-default-timezone-get-changelog"> <h3 class="title">Changelog</h3> <p class="para"> <table class="doctable informaltable"> <thead> <tr> <th>Version</th> <th>Description</th> </tr> </thead> <tbody class="tbody"> <tr> <td>5.4.0</td> <td> The <em>TZ</em> environment variable is no longer used to guess the timezone. </td> </tr> <tr> <td>5.4.0</td> <td> The timezone is no longer guessed from information available through the operating system as the guessed timezone can not be relied on. </td> </tr> </tbody> </table> </p> </div> <div class="refsect1 examples" id="refsect1-function.date-default-timezone-get-examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example" id="example-2293"> <p><strong>Example #1 Getting the default timezone</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />date_default_timezone_set</span><span style="color: #007700">(</span><span style="color: #DD0000">'Europe/London'</span><span style="color: #007700">);<br /><br />if (</span><span style="color: #0000BB">date_default_timezone_get</span><span style="color: #007700">()) {<br /> echo </span><span style="color: #DD0000">'date_default_timezone_set: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">date_default_timezone_get</span><span style="color: #007700">() . </span><span style="color: #DD0000">'<br />'</span><span style="color: #007700">;<br />}<br /><br />if (</span><span style="color: #0000BB">ini_get</span><span style="color: #007700">(</span><span style="color: #DD0000">'date.timezone'</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'date.timezone: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">ini_get</span><span style="color: #007700">(</span><span style="color: #DD0000">'date.timezone'</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> <div class="example-contents"><p>The above example will output something similar to:</p></div> <div class="example-contents screen"> <div class="cdata"><pre> date_default_timezone_set: Europe/London date.timezone: Europe/London </pre></div> </div> </div> </p> <p class="para"> <div class="example" id="example-2294"> <p><strong>Example #2 Getting the abbreviation of a timezone</strong></p> <div class="example-contents"> <div class="phpcode"><code><span style="color: #000000"> <span style="color: #0000BB"><?php<br />date_default_timezone_set</span><span style="color: #007700">(</span><span style="color: #DD0000">'America/Los_Angeles'</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">date_default_timezone_get</span><span style="color: #007700">() . </span><span style="color: #DD0000">' => ' </span><span style="color: #007700">. </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'e'</span><span style="color: #007700">) . </span><span style="color: #DD0000">' => ' </span><span style="color: #007700">. </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'T'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span> </span> </code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents screen"> <div class="cdata"><pre> America/Los_Angeles => America/Los_Angeles => PST </pre></div> </div> </div> </p> </div> <div class="refsect1 seealso" id="refsect1-function.date-default-timezone-get-seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"> <span class="function"><a href="function.date-default-timezone-set.html" class="function" rel="rdfs-seeAlso">date_default_timezone_set()</a> - Sets the default timezone used by all date/time functions in a script</span></li> <li class="member"><a href="timezones.html" class="xref">List of Supported Timezones</a></li> </ul> </p> </div> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; 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