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181 lines
11 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Perform a regular expression search and replace with multibyte support using a callback</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.mb-ereg-replace-callback" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mb_ereg_replace_callback</h1>
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<p class="verinfo">(PHP 5 >= 5.4.1, PHP 7)</p><p class="refpurpose"><span class="refname">mb_ereg_replace_callback</span> — <span class="dc-title">Perform a regular expression search and replace with multibyte support using a callback
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</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.mb-ereg-replace-callback-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>mb_ereg_replace_callback</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$pattern</code></span>
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, <span class="methodparam"><span class="type"><a href="language.types.callable.html" class="type callable">callable</a></span> <code class="parameter">$callback</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$string</code></span>
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[, <span class="methodparam"><span class="type">string</span> <code class="parameter">$option</code><span class="initializer"> = "msr"</span></span>
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] ) : <span class="type">string</span></div>
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<p class="para rdfs-comment">
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Scans <code class="parameter">string</code> for matches to
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<code class="parameter">pattern</code>, then replaces the matched text
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with the output of <code class="parameter">callback</code> function.
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</p>
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<p class="para">
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The behavior of this function is almost identical to <span class="function"><a href="mb_ereg_replace.html" class="function">mb_ereg_replace()</a></span>,
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except for the fact that instead of
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<code class="parameter">replacement</code> parameter, one should specify a
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<code class="parameter">callback</code>.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.mb-ereg-replace-callback-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">pattern</code></dt>
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<dd>
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<p class="para">
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The regular expression pattern.
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</p>
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<p class="para">
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Multibyte characters may be used in <code class="parameter">pattern</code>.
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</p>
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</dd>
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<dt>
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<code class="parameter">callback</code></dt>
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<dd>
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<p class="para">
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A callback that will be called and passed an array of matched elements
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in the <code class="parameter">subject</code> string. The callback should
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return the replacement string.
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</p>
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<p class="para">
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You'll often need the <code class="parameter">callback</code> function
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for a <span class="function"><strong>mb_ereg_replace_callback()</strong></span> in just one place.
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In this case you can use an
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<a href="functions.anonymous.html" class="link">anonymous function</a> to
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declare the callback within the call to
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<span class="function"><strong>mb_ereg_replace_callback()</strong></span>. By doing it this way
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you have all information for the call in one place and do not
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clutter the function namespace with a callback function's name
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not used anywhere else.
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</p>
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</dd>
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<dt>
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<code class="parameter">string</code></dt>
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<dd>
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<p class="para">
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The <span class="type"><a href="language.types.string.html" class="type string">string</a></span> being checked.
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</p>
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</dd>
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<dt>
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<code class="parameter">option</code></dt>
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<dd>
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<p class="para">
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The search option. See <span class="function"><a href="mb_regex_set_options.html" class="function">mb_regex_set_options()</a></span> for explanation.
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.mb-ereg-replace-callback-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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The resultant <span class="type"><a href="language.types.string.html" class="type string">string</a></span> on success, or <strong><code>FALSE</code></strong> on error.
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</p>
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</div>
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<div class="refsect1 notes" id="refsect1-function.mb-ereg-replace-callback-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>: <p class="para"><span class="function"><a href="mb_regex_encoding.html" class="function">mb_regex_encoding()</a></span>
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指定的内部编码或字符编码将会当作此函数用的字符编码。</p></p></blockquote>
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</div>
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<div class="refsect1 examples" id="refsect1-function.mb-ereg-replace-callback-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-3186">
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<p><strong>Example #1 <span class="function"><strong>mb_ereg_replace_callback()</strong></span> example</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// this text was used in 2002<br />// we want to get this up to date for 2003<br /></span><span style="color: #0000BB">$text </span><span style="color: #007700">= </span><span style="color: #DD0000">"April fools day is 04/01/2002\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$text</span><span style="color: #007700">.= </span><span style="color: #DD0000">"Last christmas was 12/24/2001\n"</span><span style="color: #007700">;<br /></span><span style="color: #FF8000">// the callback function<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">next_year</span><span style="color: #007700">(</span><span style="color: #0000BB">$matches</span><span style="color: #007700">)<br />{<br /> </span><span style="color: #FF8000">// as usual: $matches[0] is the complete match<br /> // $matches[1] the match for the first subpattern<br /> // enclosed in '(...)' and so on<br /> </span><span style="color: #007700">return </span><span style="color: #0000BB">$matches</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">].(</span><span style="color: #0000BB">$matches</span><span style="color: #007700">[</span><span style="color: #0000BB">2</span><span style="color: #007700">]+</span><span style="color: #0000BB">1</span><span style="color: #007700">);<br />}<br />echo </span><span style="color: #0000BB">mb_ereg_replace_callback</span><span style="color: #007700">(<br /> </span><span style="color: #DD0000">"(\d{2}/\d{2}/)(\d{4})"</span><span style="color: #007700">,<br /> </span><span style="color: #DD0000">"next_year"</span><span style="color: #007700">,<br /> </span><span style="color: #0000BB">$text</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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April fools day is 04/01/2003
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Last christmas was 12/24/2002
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</pre></div>
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</div>
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</div>
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</p>
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<p class="para">
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<div class="example" id="example-3187">
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<p><strong>Example #2 <span class="function"><strong>mb_ereg_replace_callback()</strong></span> using anonymous function
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supported in PHP 5.3.0 or later</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// this text was used in 2002<br />// we want to get this up to date for 2003<br /></span><span style="color: #0000BB">$text </span><span style="color: #007700">= </span><span style="color: #DD0000">"April fools day is 04/01/2002\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$text</span><span style="color: #007700">.= </span><span style="color: #DD0000">"Last christmas was 12/24/2001\n"</span><span style="color: #007700">;<br /><br />echo </span><span style="color: #0000BB">mb_ereg_replace_callback</span><span style="color: #007700">(<br /> </span><span style="color: #DD0000">"(\d{2}/\d{2}/)(\d{4})"</span><span style="color: #007700">,<br /> function (</span><span style="color: #0000BB">$matches</span><span style="color: #007700">) {<br /> return </span><span style="color: #0000BB">$matches</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">].(</span><span style="color: #0000BB">$matches</span><span style="color: #007700">[</span><span style="color: #0000BB">2</span><span style="color: #007700">]+</span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /> },<br /> </span><span style="color: #0000BB">$text</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.mb-ereg-replace-callback-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="mb_regex_encoding.html" class="function" rel="rdfs-seeAlso">mb_regex_encoding()</a> - Set/Get character encoding for multibyte regex</span></li>
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<li class="member"><span class="function"><a href="mb_ereg_replace.html" class="function" rel="rdfs-seeAlso">mb_ereg_replace()</a> - Replace regular expression with multibyte support</span></li>
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<li class="member"><a href="functions.anonymous.html" class="link">Anonymous functions</a></li>
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<li class="member"><a href="language.pseudo-types.html#language.types.callback" class="link">callback</a> 类型的信息</li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |