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<title>Finds whether a value is a legal finite number</title>
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<h1 class="refname">is_finite</h1>
<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5)</p><p class="refpurpose"><span class="refname">is_finite</span> — <span class="dc-title">Finds whether a value is a legal finite number</span></p>
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<div class="refsect1 description" id="refsect1-function.is-finite-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">bool</span> <span class="methodname"><strong>is_finite</strong></span>
( <span class="methodparam"><span class="type">float</span> <code class="parameter">$val</code></span>
)</div>
<p class="para rdfs-comment">
Checks whether <em><code class="parameter">val</code></em> is a legal finite
on this platform.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.is-finite-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">val</code></em></span>
<dd>
<p class="para">
The value to check
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.is-finite-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
<strong><code>TRUE</code></strong> if <em><code class="parameter">val</code></em> is a legal finite
number within the allowed range for a PHP float on this platform,
else <strong><code>FALSE</code></strong>.
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.is-finite-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.is-infinite.html" class="function" rel="rdfs-seeAlso">is_infinite()</a> - Finds whether a value is infinite</span></li>
<li class="member"> <span class="function"><a href="function.is-nan.html" class="function" rel="rdfs-seeAlso">is_nan()</a> - Finds whether a value is not a number</span></li>
</ul>
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