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<title>Set/Get the default options for mbregex functions</title>
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<div class="refnamediv">
<h1 class="refname">mb_regex_set_options</h1>
<p class="verinfo">(PHP 4 >= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">mb_regex_set_options</span> — <span class="dc-title">Set/Get the default options for mbregex functions</span></p>
</div>
<div class="refsect1 description" id="refsect1-function.mb-regex-set-options-description">
<h3 class="title">Description</h3>
<div class="methodsynopsis dc-description">
<span class="type">string</span> <span class="methodname"><strong>mb_regex_set_options</strong></span>
([ <span class="methodparam"><span class="type">string</span> <code class="parameter">$options</code><span class="initializer"> = mb_regex_set_options()</span></span>
] )</div>
<p class="simpara">
Sets the default options described by <code class="parameter">options</code>
for multibyte regex functions.
</p>
</div>
<div class="refsect1 parameters" id="refsect1-function.mb-regex-set-options-parameters">
<h3 class="title">Parameters</h3>
<p class="para">
<dl>
<dt>
<code class="parameter">options</code></dt>
<dd>
<p class="para">
The options to set. This is a string where each
character is an option. To set a mode, the mode
character must be the last one set, however there
can only be set one mode but multiple options.
</p>
<table class="doctable table">
<caption><strong>Regex options</strong></caption>
<thead>
<tr>
<th>Option</th>
<th>Meaning</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>i</td>
<td>Ambiguity match on</td>
</tr>
<tr>
<td>x</td>
<td>Enables extended pattern form</td>
</tr>
<tr>
<td>m</td>
<td><em>'.'</em> matches with newlines</td>
</tr>
<tr>
<td>s</td>
<td><em>'^'</em> -> <em>'\A'</em>, <em>'$'</em> -> <em>'\Z'</em></td>
</tr>
<tr>
<td>p</td>
<td>Same as both the <em>m</em> and <em>s</em> options</td>
</tr>
<tr>
<td>l</td>
<td>Finds longest matches</td>
</tr>
<tr>
<td>n</td>
<td>Ignores empty matches</td>
</tr>
<tr>
<td>e</td>
<td><span class="function"><a href="function.eval.html" class="function">eval()</a></span> resulting code</td>
</tr>
</tbody>
</table>
<table class="doctable table">
<caption><strong>Regex syntax modes</strong></caption>
<thead>
<tr>
<th>Mode</th>
<th>Meaning</th>
</tr>
</thead>
<tbody class="tbody">
<tr>
<td>j</td>
<td>Java (Sun java.util.regex)</td>
</tr>
<tr>
<td>u</td>
<td>GNU regex</td>
</tr>
<tr>
<td>g</td>
<td>grep</td>
</tr>
<tr>
<td>c</td>
<td>Emacs</td>
</tr>
<tr>
<td>r</td>
<td>Ruby</td>
</tr>
<tr>
<td>z</td>
<td>Perl</td>
</tr>
<tr>
<td>b</td>
<td>POSIX Basic regex</td>
</tr>
<tr>
<td>d</td>
<td>POSIX Extended regex</td>
</tr>
</tbody>
</table>
</dd>
</dl>
</p>
</div>
<div class="refsect1 returnvalues" id="refsect1-function.mb-regex-set-options-returnvalues">
<h3 class="title">Return Values</h3>
<p class="para">
The previous options. If <code class="parameter">options</code> is omitted,
it returns the <span class="type"><a href="language.types.string.html" class="type string">string</a></span> that describes the current options.
</p>
</div>
<div class="refsect1 seealso" id="refsect1-function.mb-regex-set-options-seealso">
<h3 class="title">See Also</h3>
<p class="para">
<ul class="simplelist">
<li class="member"><span class="function"><a href="function.mb-split.html" class="function" rel="rdfs-seeAlso">mb_split()</a> - Split multibyte string using regular expression</span></li>
<li class="member"><span class="function"><a href="function.mb-ereg.html" class="function" rel="rdfs-seeAlso">mb_ereg()</a> - Regular expression match with multibyte support</span></li>
<li class="member"><span class="function"><a href="function.mb-eregi.html" class="function" rel="rdfs-seeAlso">mb_eregi()</a> - Regular expression match ignoring case with multibyte support</span></li>
</ul>
</p>
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