mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-18 13:57:03 +08:00
165 lines
9.0 KiB
HTML
165 lines
9.0 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
<html>
|
||
<head>
|
||
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
|
||
<title>查找字符串首次出现的位置（不区分大小写）</title>
|
||
</head>
|
||
<body class="docs"><div id="layout">
|
||
<div id="layout-content"><div id="function.stripos" class="refentry">
|
||
<div class="refnamediv">
|
||
<h1 class="refname">stripos</h1>
|
||
<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">stripos</span> — <span class="dc-title">查找字符串首次出现的位置（不区分大小写）</span></p>
|
||
|
||
</div>
|
||
|
||
<div class="refsect1 description" id="refsect1-function.stripos-description">
|
||
<h3 class="title">说明</h3>
|
||
<div class="methodsynopsis dc-description">
|
||
<span class="methodname"><strong>stripos</strong></span>
|
||
( <span class="methodparam"><span class="type">string</span> <code class="parameter">$haystack</code></span>
|
||
, <span class="methodparam"><span class="type">string</span> <code class="parameter">$needle</code></span>
|
||
[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$offset</code><span class="initializer"> = 0</span></span>
|
||
] ) : <span class="type">int</span></div>
|
||
|
||
<p class="para rdfs-comment">
|
||
返回在<span class="type"><span class="type 字符串">字符串</span></span> <code class="parameter">haystack</code> 中 <code class="parameter">needle</code> 首次出现的数字位置。
|
||
</p>
|
||
<p class="para">
|
||
与 <span class="function"><a href="strpos.html" class="function">strpos()</a></span> 不同，<span class="function"><strong>stripos()</strong></span> 不区分大小写。
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 parameters" id="refsect1-function.stripos-parameters">
|
||
<h3 class="title">参数</h3>
|
||
<p class="para">
|
||
<dl>
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">haystack</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
在该字符串中查找。
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">needle</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
注意 <code class="parameter">needle</code> 可以是一个单字符或者多字符的字符串。
|
||
</p>
|
||
<p class="para">
|
||
如果 <code class="parameter">needle</code> 不是一个字符串，那么它将被转换为整型并被视为字符顺序值。
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
|
||
<dt>
|
||
<code class="parameter">offset</code></dt>
|
||
|
||
<dd>
|
||
|
||
<p class="para">
|
||
可选的 <code class="parameter">offset</code> 参数，从字符此数量的开始位置进行搜索。
|
||
如果是负数，就从字符末尾此数量的字符数开始统计。
|
||
</p>
|
||
</dd>
|
||
|
||
|
||
</dl>
|
||
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 returnvalues" id="refsect1-function.stripos-returnvalues">
|
||
<h3 class="title">返回值</h3>
|
||
<p class="para">
|
||
返回 needle 存在于 <code class="parameter">haystack</code> 字符串开始的位置(独立于偏移量)。同时注意字符串位置起始于 0，而不是 1。
|
||
</p>
|
||
<p class="para">
|
||
如果未发现 needle 将返回 <strong><code>FALSE</code></strong>。
|
||
</p>
|
||
<div class="warning"><strong class="warning">Warning</strong><p class="simpara">此函数可能返回布尔值
|
||
<strong><code>FALSE</code></strong>，但也可能返回等同于 <strong><code>FALSE</code></strong> 的非布尔值。请阅读 <a href="language.types.boolean.html" class="link">布尔类型</a>章节以获取更多信息。应使用
|
||
<a href="language.operators.comparison.html" class="link">===
|
||
运算符</a>来测试此函数的返回值。</p></div>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 changelog" id="refsect1-function.stripos-changelog">
|
||
<h3 class="title">更新日志</h3>
|
||
<table class="doctable informaltable">
|
||
|
||
<thead>
|
||
<tr>
|
||
<th>版本</th>
|
||
<th>说明</th>
|
||
</tr>
|
||
|
||
</thead>
|
||
|
||
<tbody class="tbody">
|
||
<tr>
|
||
<td>7.1.0</td>
|
||
<td>
|
||
开始支持负数的 <code class="parameter">offset</code>。
|
||
</td>
|
||
</tr>
|
||
|
||
</tbody>
|
||
|
||
</table>
|
||
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 examples" id="refsect1-function.stripos-examples">
|
||
<h3 class="title">范例</h3>
|
||
<p class="para">
|
||
<div class="example" id="example-5966">
|
||
<p><strong>Example #1 <span class="function"><strong>stripos()</strong></span> 范例</strong></p>
|
||
<div class="example-contents">
|
||
<div class="phpcode"><pre><span style="color: #000000">
|
||
<span style="color: #0000BB"><?php<br />$findme </span><span style="color: #007700">= </span><span style="color: #DD0000">'a'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$mystring1 </span><span style="color: #007700">= </span><span style="color: #DD0000">'xyz'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$mystring2 </span><span style="color: #007700">= </span><span style="color: #DD0000">'ABC'</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$pos1 </span><span style="color: #007700">= </span><span style="color: #0000BB">stripos</span><span style="color: #007700">(</span><span style="color: #0000BB">$mystring1</span><span style="color: #007700">, </span><span style="color: #0000BB">$findme</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$pos2 </span><span style="color: #007700">= </span><span style="color: #0000BB">stripos</span><span style="color: #007700">(</span><span style="color: #0000BB">$mystring2</span><span style="color: #007700">, </span><span style="color: #0000BB">$findme</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// 'a' 当然不在 'xyz' 中<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">$pos1 </span><span style="color: #007700">=== </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"The string '</span><span style="color: #0000BB">$findme</span><span style="color: #DD0000">' was not found in the string '</span><span style="color: #0000BB">$mystring1</span><span style="color: #DD0000">'"</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #FF8000">// 注意这里使用的是 ===。简单的 == 不能像我们期望的那样工作，<br />// 因为 'a' 的位置是 0（第一个字符）。<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">$pos2 </span><span style="color: #007700">!== </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"We found '</span><span style="color: #0000BB">$findme</span><span style="color: #DD0000">' in '</span><span style="color: #0000BB">$mystring2</span><span style="color: #DD0000">' at position </span><span style="color: #0000BB">$pos2</span><span style="color: #DD0000">"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span>
|
||
</span>
|
||
</pre></div>
|
||
</div>
|
||
|
||
</div>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 notes" id="refsect1-function.stripos-notes">
|
||
<h3 class="title">注释</h3>
|
||
<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数可安全用于二进制对象。</span></p></blockquote>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 seealso" id="refsect1-function.stripos-seealso">
|
||
<h3 class="title">参见</h3>
|
||
<p class="para">
|
||
<ul class="simplelist">
|
||
<li class="member"><span class="function"><a href="mb_stripos.html" class="function" rel="rdfs-seeAlso">mb_stripos()</a> - 大小写不敏感地查找字符串在另一个字符串中首次出现的位置</span></li>
|
||
<li class="member"><span class="function"><a href="strpos.html" class="function" rel="rdfs-seeAlso">strpos()</a> - 查找字符串首次出现的位置</span></li>
|
||
<li class="member"><span class="function"><a href="strrpos.html" class="function" rel="rdfs-seeAlso">strrpos()</a> - 计算指定字符串在目标字符串中最后一次出现的位置</span></li>
|
||
<li class="member"><span class="function"><a href="strripos.html" class="function" rel="rdfs-seeAlso">strripos()</a> - 计算指定字符串在目标字符串中最后一次出现的位置（不区分大小写）</span></li>
|
||
<li class="member"><span class="function"><a href="stristr.html" class="function" rel="rdfs-seeAlso">stristr()</a> - strstr 函数的忽略大小写版本</span></li>
|
||
<li class="member"><span class="function"><a href="substr.html" class="function" rel="rdfs-seeAlso">substr()</a> - 返回字符串的子串</span></li>
|
||
<li class="member"><span class="function"><a href="str_ireplace.html" class="function" rel="rdfs-seeAlso">str_ireplace()</a> - str_replace 的忽略大小写版本</span></li>
|
||
</ul>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
</div></div></div></body></html> |