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<title>Get string length</title>
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</div><hr /><div id="function.strlen" class="refentry">
<div class="refnamediv">
<h1 class="refname">strlen</h1>
<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">strlen</span> — <span class="dc-title">Get string length</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.strlen-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">int</span> <span class="methodname"><strong>strlen</strong></span>
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$string</code></span>
)</div>
<p class="para rdfs-comment">
Returns the length of the given <em><code class="parameter">string</code></em>.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.strlen-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<span class="term"><em><code class="parameter">string</code></em></span>
<dd>
<p class="para">
The <span class="type"><a href="language.types.string.html" class="type string">string</a></span> being measured for length.
</p>
</dd>
</dt>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.strlen-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
The length of the <em><code class="parameter">string</code></em> on success,
and <em>0</em> if the <em><code class="parameter">string</code></em> is empty.
</p>
</div>
<div class="refsect1 changelog" id="refsect1-function.strlen-changelog">
<h3 class="title">Changelog</h3>
<table class="doctable informaltable">
<thead>
<tr>
<th>Version</th>
<th>Description</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>5.3.0</td>
<td>
Prior versions treated arrays as the string <em>Array</em>, thus returning
a string length of <em>5</em> and emitting an <strong><code>E_NOTICE</code></strong> level error.
</td>
</tr>
</tbody>
</table>
</div>
<div class="refsect1 examples" id="refsect1-function.strlen-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-4893">
<p><strong>Example #1 A <span class="function"><strong>strlen()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">'abcdef'</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">); </span><span style="color: #FF8000">// 6<br /><br /></span><span style="color: #0000BB">$str </span><span style="color: #007700">= </span><span style="color: #DD0000">' ab cd '</span><span style="color: #007700">;<br />echo </span><span style="color: #0000BB">strlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">); </span><span style="color: #FF8000">// 7<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 notes" id="refsect1-function.strlen-notes">
<h3 class="title">Notes</h3>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
<span class="function"><strong>strlen()</strong></span> returns the number of bytes rather than the number
of characters in a string.
</p>
</p></blockquote>
<blockquote class="note"><p><strong class="note">Note</strong>:
<p class="para">
<span class="function"><strong>strlen()</strong></span> returns <strong><code>NULL</code></strong> when executed on arrays, and
an <strong><code>E_WARNING</code></strong> level error is emitted.
</p>
</p></blockquote>
</div>
<div class="refsect1 seealso" id="refsect1-function.strlen-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.count.html" class="function" rel="rdfs-seeAlso">count()</a> - Count all elements in an array, or something in an object</span></li>
<li class="member"> <span class="function"><a href="function.mb-strlen.html" class="function" rel="rdfs-seeAlso">mb_strlen()</a> - Get string length</span></li>
</ul>
</p>
</div>
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