function.checkdate.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>Validate a Gregorian date</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="ref.datetime.html">Date/Time Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.date-add.html">date_add</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.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"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>checkdate</b></b></span> ( <span class="methodparam"><span class="type">int</span> <tt class="parameter">$month</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$day</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$year</tt></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"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">month</tt></i></span> <dd> <p class="para"> The month is between 1 and 12 inclusive. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">day</tt></i></span> <dd> <p class="para"> The day is within the allowed number of days for the given <i><tt class="parameter">month</tt></i>. Leap <i><tt class="parameter">year</tt></i>s are taken into consideration. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">year</tt></i></span> <dd> <p class="para"> The year is between 1 and 32767 inclusive. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> if the date given is valid; otherwise returns <b><tt>FALSE</tt></b>. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>checkdate()</b> example</b></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"><pre><div class="cdata"><pre>bool(true)bool(false)</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.mktime.html" class="function" rel="rdfs-seeAlso">mktime()</a></li> <li class="member"><a href="function.strtotime.html" class="function" rel="rdfs-seeAlso">strtotime()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.datetime.html">Date/Time Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.date-add.html">date_add</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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