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<title>Get string length</title>
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<h1 class="refname">mb_strlen</h1>
<p class="verinfo">(PHP 4 >= 4.0.6, PHP 5)</p><p class="refpurpose"><span class="refname">mb_strlen</span> — <span class="dc-title">Get string length</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.mb-strlen-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><strong>mb_strlen</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$str</code></span>
[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$encoding</code><span class="initializer"> = mb_internal_encoding()</span></span>
] )</div>
<p class="para rdfs-comment">
Gets the length of a <span class="type"><a href="language.types.string.html" class="type string">string</a></span>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.mb-strlen-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">str</code></em></span>
<dd>
<p class="para">
The <span class="type"><a href="language.types.string.html" class="type string">string</a></span> being checked for length.
</p>
</dd>
</dt>
<dt>
<span class="term"><em><code class="parameter">encoding</code></em></span>
<dd>
<p class="para">The <em><code class="parameter">encoding</code></em>
parameter is the character encoding. If it is omitted, the internal character
encoding value will be used.</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.mb-strlen-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
Returns the number of characters in
<span class="type"><a href="language.types.string.html" class="type string">string</a></span> <em><code class="parameter">str</code></em> having character encoding
<em><code class="parameter">encoding</code></em>. A multi-byte character is
counted as 1.
</p>
<p class="para">
Returns <strong><code>FALSE</code></strong> if the given <em><code class="parameter">encoding</code></em> is invalid.
</p>
<div class="warning"><strong class="warning">Warning</strong><p class="simpara">This function may
return Boolean <strong><code>FALSE</code></strong>, but may also return a non-Boolean value which
evaluates to <strong><code>FALSE</code></strong>. Please read the section on <a href="language.types.boolean.html" class="link">Booleans</a> for more
information. Use <a href="language.operators.comparison.html" class="link">the ===
operator</a> for testing the return value of this
function.</p></div>
</div>
<div class="refsect1 seealso" id="refsect1-function.mb-strlen-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.mb-internal-encoding.html" class="function" rel="rdfs-seeAlso">mb_internal_encoding()</a> - Set/Get internal character encoding</span></li>
<li class="member"> <span class="function"><a href="function.strlen.html" class="function" rel="rdfs-seeAlso">strlen()</a> - Get string length</span></li>
</ul>
</p>
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