function.grapheme-strrpos.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Find position (in grapheme units) of last occurrence of a string</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.grapheme-strripos.html">grapheme_strripos</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.grapheme-strstr.html">grapheme_strstr</a></div> <div class="up"><a href="ref.intl.html">intl Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.grapheme-strrpos" class="refentry"> <div class="refnamediv"> <h1 class="refname">grapheme_strrpos</h1> <p class="verinfo">(No version information available, might be only in CVS)</p><p class="refpurpose"><span class="refname">grapheme_strrpos</span> — <span class="dc-title">Find position (in grapheme units) of last occurrence of a string</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <p class="para">Procedural style</p> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><b><b>grapheme_strrpos</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$haystack</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$needle</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$offset</tt></span> ] )</div> <p class="para rdfs-comment"> Find position (in grapheme units) of last occurrence of a string </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">haystack</tt></i></span> <dd> <p class="para"> The string to look in. Must be valid UTF-8. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">needle</tt></i></span> <dd> <p class="para"> The string to look for. Must be valid UTF-8. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">offset</tt></i></span> <dd> <p class="para"> The optional $offset parameter allows you to specify where in $haystack to start searching as an offset in grapheme units (not bytes or characters). If not given, the default is zero. The position returned is still relative to the beginning of haystack regardless of the value of $offset. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the position as an integer. If needle is not found, grapheme_strrpos() will return boolean FALSE. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <div class="example"> <p><b>Example #1 <b>grapheme_strrpos()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000">< ?php<br /><br />$char_a_ring_nfd = "a\xCC\x8A"; // 'LATIN SMALL LETTER A WITH RING ABOVE' (U+00E5) normalization form "D"<br />$char_o_diaeresis_nfd = "o\xCC\x88"; // 'LATIN SMALL LETTER O WITH DIAERESIS' (U+00F6) normalization form "D"<br /><br />print grapheme_strrpos( $char_a_ring_nfd . $char_o_diaeresis_nfd . $char_o_diaeresis_nfd, $char_o_diaeresis_nfd);<br /><br />?></span></code></div> </div> </div> <p class="para">The above example will output:</p> <div class="example-contents"><pre><div class="cdata"><pre>2</pre></div> </pre></div> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.grapheme-stripos.html" class="function" rel="rdfs-seeAlso">grapheme_stripos()</a></li> <li class="member"><a href="function.grapheme-stristr.html" class="function" rel="rdfs-seeAlso">grapheme_stristr()</a></li> <li class="member"><a href="function.grapheme-strpos.html" class="function" rel="rdfs-seeAlso">grapheme_strpos()</a></li> <li class="member"><a href="function.grapheme-strripos.html" class="function" rel="rdfs-seeAlso">grapheme_strripos()</a></li> <li class="member"><a href="function.grapheme-strstr.html" class="function" rel="rdfs-seeAlso">grapheme_strstr()</a></li> <li class="member"> <a href="http://unicode.org/reports/tr29/#Grapheme_Cluster_Boundaries" class="link external">» Unicode Text Segmentation: Grapheme Cluster Boundaries </a> </li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.grapheme-strripos.html">grapheme_strripos</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.grapheme-strstr.html">grapheme_strstr</a></div> <div class="up"><a href="ref.intl.html">intl Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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