<!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>Find whether the type of a variable is integer</title>
</head>
<body><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="function.is-float.html">is_float</a></div>
<div class="next" style="text-align: right; float: right;"><a href="function.is-integer.html">is_integer</a></div>
<div class="up"><a href="ref.var.html">Variable handling Functions</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div><hr /><div id="function.is-int" class="refentry">
<div class="refnamediv">
<h1 class="refname">is_int</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">is_int</span> — <span class="dc-title">Find whether the type of a variable is integer</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.is-int-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>is_int</strong></span>
( <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$var</code></span>
)</div>
<p class="para rdfs-comment">
Finds whether the type of the given variable is integer.
</p>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
To test if a variable is a number or a numeric string (such as form
input, which is always a string), you must use
<span class="function"><a href="function.is-numeric.html" class="function">is_numeric()</a></span>.
</p>
</p></blockquote>
</div>
<div class="refsect1 parameters" id="refsect1-function.is-int-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">var</code></em></span>
<dd>
<p class="para">
The variable being evaluated.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.is-int-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns <strong><code>TRUE</code></strong> if <em><code class="parameter">var</code></em> is an <span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>,
<strong><code>FALSE</code></strong> otherwise.
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.is-int-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-5260">
<p><strong>Example #1 <span class="function"><strong>is_int()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$values </span><span style="color: #007700">= array(</span><span style="color: #0000BB">23</span><span style="color: #007700">, </span><span style="color: #DD0000">"23"</span><span style="color: #007700">, </span><span style="color: #0000BB">23.5</span><span style="color: #007700">, </span><span style="color: #DD0000">"23.5"</span><span style="color: #007700">, </span><span style="color: #0000BB">null</span><span style="color: #007700">, </span><span style="color: #0000BB">true</span><span style="color: #007700">, </span><span style="color: #0000BB">false</span><span style="color: #007700">);<br />foreach (</span><span style="color: #0000BB">$values </span><span style="color: #007700">as </span><span style="color: #0000BB">$value</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"is_int("</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">var_export</span><span style="color: #007700">(</span><span style="color: #0000BB">$value</span><span style="color: #007700">);<br /> echo </span><span style="color: #DD0000">") = "</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">is_int</span><span style="color: #007700">(</span><span style="color: #0000BB">$value</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:</p></div>
<div class="example-contents screen">
<div class="cdata"><pre>
is_int(23) = bool(true)
is_int('23') = bool(false)
is_int(23.5) = bool(false)
is_int('23.5') = bool(false)
is_int(NULL) = bool(false)
is_int(true) = bool(false)
is_int(false) = bool(false)
</pre></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.is-int-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.is-bool.html" class="function" rel="rdfs-seeAlso">is_bool()</a> - Finds out whether a variable is a boolean</span></li>
<li class="member"> <span class="function"><a href="function.is-float.html" class="function" rel="rdfs-seeAlso">is_float()</a> - Finds whether the type of a variable is float</span></li>
<li class="member"> <span class="function"><a href="function.is-numeric.html" class="function" rel="rdfs-seeAlso">is_numeric()</a> - Finds whether a variable is a number or a numeric string</span></li>
<li class="member"> <span class="function"><a href="function.is-string.html" class="function" rel="rdfs-seeAlso">is_string()</a> - Find whether the type of a variable is string</span></li>
<li class="member"> <span class="function"><a href="function.is-array.html" class="function" rel="rdfs-seeAlso">is_array()</a> - Finds whether a variable is an array</span></li>
<li class="member"> <span class="function"><a href="function.is-object.html" class="function" rel="rdfs-seeAlso">is_object()</a> - Finds whether a variable is an object</span></li>
</ul>
</p>
</div>
</div><hr /><div class="manualnavbar" style="text-align: center;">
<div class="prev" style="text-align: left; float: left;"><a href="function.is-float.html">is_float</a></div>
<div class="next" style="text-align: right; float: right;"><a href="function.is-integer.html">is_integer</a></div>
<div class="up"><a href="ref.var.html">Variable handling Functions</a></div>
<div class="home"><a href="index.html">PHP Manual</a></div>
</div></body></html>
