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<title>Validate a Gregorian date</title>
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</div><hr /><div id="function.checkdate" class="refentry">
<div class="refnamediv">
<h1 class="refname">checkdate</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">checkdate</span> — <span class="dc-title">Validate a Gregorian date</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.checkdate-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>checkdate</strong></span>
( <span class="methodparam"><span class="type">int</span> <code class="parameter">$month</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$day</code></span>
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$year</code></span>
)</div>
<p class="para rdfs-comment">
Checks the validity of the date formed by the arguments. A date
is considered valid if each parameter is properly defined.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.checkdate-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">month</code></em></span>
<dd>
<p class="para">
The month is between 1 and 12 inclusive.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">day</code></em></span>
<dd>
<p class="para">
The day is within the allowed number of days for the given
<em><code class="parameter">month</code></em>. Leap <em><code class="parameter">year</code></em>s
are taken into consideration.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">year</code></em></span>
<dd>
<p class="para">
The year is between 1 and 32767 inclusive.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.checkdate-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> if the date given is valid; otherwise returns <strong><code>FALSE</code></strong>.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.checkdate-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-2292">
<p><strong>Example #1 <span class="function"><strong>checkdate()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">checkdate</span><span style="color: #007700">(</span><span style="color: #0000BB">12</span><span style="color: #007700">, </span><span style="color: #0000BB">31</span><span style="color: #007700">, </span><span style="color: #0000BB">2000</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">checkdate</span><span style="color: #007700">(</span><span style="color: #0000BB">2</span><span style="color: #007700">, </span><span style="color: #0000BB">29</span><span style="color: #007700">, </span><span style="color: #0000BB">2001</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>
bool(true)
bool(false)
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.checkdate-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.mktime.html" class="function" rel="rdfs-seeAlso">mktime()</a> - Get Unix timestamp for a date</span></li>
<li class="member"> <span class="function"><a href="function.strtotime.html" class="function" rel="rdfs-seeAlso">strtotime()</a> - Parse about any English textual datetime description into a Unix timestamp</span></li>
</ul>
</p>
</div>
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