function.strripos.html
来自「php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容」· HTML 代码 · 共 166 行
HTML
166 行
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Find position of last occurrence of a case-insensitive string in 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.strrev.html">strrev</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.strrpos.html">strrpos</a></div> <div class="up"><a href="ref.strings.html">String Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.strripos" class="refentry"> <div class="refnamediv"> <h1 class="refname">strripos</h1> <p class="verinfo">(PHP 5)</p><p class="refpurpose"><span class="refname">strripos</span> — <span class="dc-title">Find position of last occurrence of a case-insensitive string in a string</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">int</span> <span class="methodname"><b><b>strripos</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 of last occurrence of a case-insensitive string in a string. Unlike <a href="function.strrpos.html" class="function">strrpos()</a>, <b>strripos()</b> is case-insensitive. </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 search in </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">needle</tt></i></span> <dd> <p class="para"> Note that the <i><tt class="parameter">needle</tt></i> may be a string of one or more characters. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">offset</tt></i></span> <dd> <p class="para"> The <i><tt class="parameter">offset</tt></i> parameter may be specified to begin searching an arbitrary number of characters into the string. </p> <p class="para"> Negative offset values will start the search at <i><tt class="parameter">offset</tt></i> characters from the <em class="emphasis">start</em> of the string. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns the numerical position of the last occurence of <i><tt class="parameter">needle</tt></i>. Also note that string positions start at 0, and not 1. </p> <p class="para"> If <i><tt class="parameter">needle</tt></i> is not found, <b><tt>FALSE</tt></b> is returned. </p> <div class="warning"><b class="warning">Warning</b><p class="simpara">This function mayreturn Boolean <b><tt>FALSE</tt></b>, but may also return a non-Boolean value whichevaluates to <b><tt>FALSE</tt></b>, such as <i>0</i> or"". Please read the section on <a href="language.types.boolean.html" class="link">Booleans</a> for moreinformation. Use <a href="language.operators.comparison.html" class="link">the ===operator</a> for testing the return value of thisfunction.</p></div> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 A simple <b>strripos()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$haystack </span><span style="color: #007700">= </span><span style="color: #DD0000">'ababcd'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$needle </span><span style="color: #007700">= </span><span style="color: #DD0000">'aB'</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$pos </span><span style="color: #007700">= </span><span style="color: #0000BB">strripos</span><span style="color: #007700">(</span><span style="color: #0000BB">$haystack</span><span style="color: #007700">, </span><span style="color: #0000BB">$needle</span><span style="color: #007700">);<br /><br />if (</span><span style="color: #0000BB">$pos </span><span style="color: #007700">=== </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"Sorry, we did not find ($needle) in ($haystack)"</span><span style="color: #007700">;<br />} else {<br /> echo </span><span style="color: #DD0000">"Congratulations!\n"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"We found the last ($needle) in ($haystack) at position ($pos)"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre> Congratulations! We found the last (aB) in (ababcd) at position (2)</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.strpos.html" class="function" rel="rdfs-seeAlso">strpos()</a></li> <li class="member"><a href="function.stripos.html" class="function" rel="rdfs-seeAlso">stripos()</a></li> <li class="member"><a href="function.strrchr.html" class="function" rel="rdfs-seeAlso">strrchr()</a></li> <li class="member"><a href="function.substr.html" class="function" rel="rdfs-seeAlso">substr()</a></li> <li class="member"><a href="function.stristr.html" class="function" rel="rdfs-seeAlso">stristr()</a></li> <li class="member"><a href="function.strstr.html" class="function" rel="rdfs-seeAlso">strstr()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.strrev.html">strrev</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.strrpos.html">strrpos</a></div> <div class="up"><a href="ref.strings.html">String Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
复制代码Ctrl + C
搜索代码Ctrl + F
全屏模式F11
增大字号Ctrl + =
减小字号Ctrl + -
显示快捷键?