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<title>Returns a numerically indexed array containing all defined timezone identifiers</title>
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<div class="refnamediv">
<h1 class="refname">DateTimeZone::listIdentifiers</h1>
<h1 class="refname">timezone_identifiers_list</h1>
<p class="verinfo">(PHP 5 >= 5.2.0)</p><p class="refpurpose"><span class="refname">DateTimeZone::listIdentifiers</span> -- <span class="refname">timezone_identifiers_list</span> — <span class="dc-title">Returns a numerically indexed array containing all defined timezone identifiers</span></p>
</div>
<div class="refsect1 description" id="refsect1-datetimezone.listidentifiers-description">
<h3 class="title">Description</h3>
<p class="para">Object oriented style</p>
<div class="methodsynopsis dc-description">
<span class="modifier">public</span> <span class="modifier">static</span> <span class="type">array</span> <span class="methodname"><strong>DateTimeZone::listIdentifiers</strong></span>
([ <span class="methodparam"><span class="type">int</span> <code class="parameter">$what</code><span class="initializer"> = DateTimeZone::ALL</span></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$country</code><span class="initializer"> = <strong><code>NULL</code></strong></span></span>
]] )</div>
<p class="para rdfs-comment">Procedural style</p>
<div class="methodsynopsis dc-description">
<span class="type">array</span> <span class="methodname"><a href="function.timezone-identifiers-list.html" class="methodname">timezone_identifiers_list</a></span>
([ <span class="methodparam"><span class="type">int</span> <code class="parameter">$what</code><span class="initializer"> = DateTimeZone::ALL</span></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$country</code><span class="initializer"> = <strong><code>NULL</code></strong></span></span>
]] )</div>
</div>
<div class="refsect1 parameters" id="refsect1-datetimezone.listidentifiers-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">what</code></em></span>
<dd>
<p class="para">
One of <a href="class.datetimezone.html" class="classname">DateTimeZone</a> class constants.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">country</code></em></span>
<dd>
<p class="para">
A two-letter ISO 3166-1 compatible country code.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<span class="simpara">
This option is only used when <em><code class="parameter">what</code></em> is set to
<strong><code>DateTimeZone::PER_COUNTRY</code></strong>.
</span>
</p></blockquote>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-datetimezone.listidentifiers-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns array on success or <strong><code>FALSE</code></strong> on failure.
</p>
</div>
<div class="refsect1 changelog" id="refsect1-datetimezone.listidentifiers-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>5.3.0</td>
<td>
Added the optional <em><code class="parameter">what</code></em> and
<em><code class="parameter">country</code></em> parameters.
</td>
</tr>
</tbody>
</table>
</p>
</div>
<div class="refsect1 examples" id="refsect1-datetimezone.listidentifiers-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-2284">
<p><strong>Example #1 A <span class="function"><a href="function.timezone-identifiers-list.html" class="function">timezone_identifiers_list()</a></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$timezone_identifiers </span><span style="color: #007700">= </span><span style="color: #0000BB">DateTimeZone</span><span style="color: #007700">::</span><span style="color: #0000BB">listIdentifiers</span><span style="color: #007700">();<br />for (</span><span style="color: #0000BB">$i</span><span style="color: #007700">=</span><span style="color: #0000BB">0</span><span style="color: #007700">; </span><span style="color: #0000BB">$i </span><span style="color: #007700">< </span><span style="color: #0000BB">5</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700">++) {<br /> echo </span><span style="color: #DD0000">"</span><span style="color: #0000BB">$timezone_identifiers</span><span style="color: #007700">[</span><span style="color: #0000BB">$i</span><span style="color: #007700">]</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<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>
Africa/Abidjan
Africa/Accra
Africa/Addis_Ababa
Africa/Algiers
Africa/Asmara
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-datetimezone.listidentifiers-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.timezone-abbreviations-list.html" class="function" rel="rdfs-seeAlso">timezone_abbreviations_list()</a> - Alias of DateTimeZone::listAbbreviations</span></li>
</ul>
</p>
</div>
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