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<h1 class="refname">mb_strtolower</h1>
<p class="verinfo">(PHP 4 >= 4.3.0, PHP 5)</p><p class="refpurpose"><span class="refname">mb_strtolower</span> — <span class="dc-title">Make a string lowercase</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.mb-strtolower-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>mb_strtolower</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">
Returns <em><code class="parameter">str</code></em>
with all alphabetic characters converted to lowercase.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.mb-strtolower-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 lowercased.
</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-strtolower-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
<em><code class="parameter">str</code></em> with all alphabetic characters converted to lowercase.
</p>
</div>
<div class="refsect1 unicode" id="refsect1-function.mb-strtolower-unicode">
<h3 class="title">Unicode</h3>
<p class="para">
For more information about the Unicode properties, please see <a href="http://www.unicode.org/unicode/reports/tr21/" class="link external">» http://www.unicode.org/unicode/reports/tr21/</a>.
</p>
<p class="para">
By contrast to <span class="function"><a href="function.strtolower.html" class="function">strtolower()</a></span>, 'alphabetic' is
determined by the Unicode character properties. Thus the behaviour
of this function is not affected by locale settings and it can convert
any characters that have 'alphabetic' property, such as A-umlaut (Ä).
</p>
</div>
<div class="refsect1 examples" id="refsect1-function.mb-strtolower-examples">
<h3 class="title">Examples</h3>
<p class="para">
<div class="example" id="example-2719">
<p><strong>Example #1 <span class="function"><strong>mb_strtolower()</strong></span> example</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">"Mary Had A Little Lamb and She LOVED It So"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$str </span><span style="color: #007700">= </span><span style="color: #0000BB">mb_strtolower</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$str</span><span style="color: #007700">; </span><span style="color: #FF8000">// Prints mary had a little lamb and she loved it so<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
<p class="para">
<div class="example" id="example-2720">
<p><strong>Example #2 <span class="function"><strong>mb_strtolower()</strong></span> example with non-Latin UTF-8 text</strong></p>
<div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB"><?php<br />$str </span><span style="color: #007700">= </span><span style="color: #DD0000">"Τάχιστη αλώπηξ βαφής ψημένη γη, δρασκελίζει υπέρ νωθρού κυνός"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$str </span><span style="color: #007700">= </span><span style="color: #0000BB">mb_strtolower</span><span style="color: #007700">(</span><span style="color: #0000BB">$str</span><span style="color: #007700">, </span><span style="color: #DD0000">'UTF-8'</span><span style="color: #007700">);<br />echo </span><span style="color: #0000BB">$str</span><span style="color: #007700">; </span><span style="color: #FF8000">// Prints τάχιστη αλώπηξ βαφής ψημένη γη, δρασκελίζει υπέρ νωθρού κυνός<br /></span><span style="color: #0000BB">?></span>
</span>
</code></div>
</div>
</div>
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.mb-strtolower-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"> <span class="function"><a href="function.mb-strtoupper.html" class="function" rel="rdfs-seeAlso">mb_strtoupper()</a> - Make a string uppercase</span></li>
<li class="member"> <span class="function"><a href="function.mb-convert-case.html" class="function" rel="rdfs-seeAlso">mb_convert_case()</a> - Perform case folding on a string</span></li>
<li class="member"> <span class="function"><a href="function.strtolower.html" class="function" rel="rdfs-seeAlso">strtolower()</a> - Make a string lowercase</span></li>
</ul>
</p>
</div>
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