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85 lines
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HTML
85 lines
4.0 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>获取已注册的流类型</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.stream-get-wrappers" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">stream_get_wrappers</h1>
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<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">stream_get_wrappers</span> — <span class="dc-title">获取已注册的流类型</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.stream-get-wrappers-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>stream_get_wrappers</strong></span>
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( <span class="methodparam">void</span>
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) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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获取在当前运行系统中已经注册并可使用的流类型列表。
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.stream-get-wrappers-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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返回一个索引数组，该数组里包含了当前运行系统中可使用的流类型的名称。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.stream-get-wrappers-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-4826">
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<p><strong>Example #1 <span class="function"><strong>stream_get_wrappers()</strong></span> 例子</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 />print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">stream_get_wrappers</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 class="example-contents"><p>以上例程的输出类似于：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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Array
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(
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[0] => php
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[1] => file
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[2] => http
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[3] => ftp
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[4] => compress.bzip2
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[5] => compress.zlib
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)
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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="stream-context-get-default.example.basic">
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<p><strong>Example #2 检查一个流类型是否存在</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">// check for the existence of the bzip2 stream wrapper<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">in_array</span><span style="color: #007700">(</span><span style="color: #DD0000">'compress.bzip2'</span><span style="color: #007700">, </span><span style="color: #0000BB">stream_get_wrappers</span><span style="color: #007700">())) {<br /> echo </span><span style="color: #DD0000">'compress.bzip2:// support enabled.'</span><span style="color: #007700">;<br />} else {<br /> echo </span><span style="color: #DD0000">'compress.bzip2:// support not enabled.'</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>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.stream-get-wrappers-seealso">
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<h3 class="title">参见</h3>
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="stream_wrapper_register.html" class="function" rel="rdfs-seeAlso">stream_wrapper_register()</a> - 注册一个用 PHP 类实现的 URL 封装协议</span></li>
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</ul>
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</div>
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</div></div></div></body></html> |