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214 lines
9.6 KiB
HTML
214 lines
9.6 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>列出指定路径中的文件和目录</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.scandir" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">scandir</h1>
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<p class="verinfo">(PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">scandir</span> — <span class="dc-title">列出指定路径中的文件和目录</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.scandir-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>scandir</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$directory</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$sorting_order</code></span>
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[, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$context</code></span>
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]] ) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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返回一个 <span class="type"><a href="language.types.array.html" class="type array">array</a></span>，包含有
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<code class="parameter">directory</code> 中的文件和目录。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.scandir-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">directory</code></dt>
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<dd>
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<p class="para">
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要被浏览的目录
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</p>
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</dd>
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<dt>
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<code class="parameter">sorting_order</code></dt>
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<dd>
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<p class="para">
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默认的排序顺序是按字母升序排列。如果使用了可选参数
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<code class="parameter">sorting_order</code>（设为
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1），则排序顺序是按字母降序排列。
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</p>
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</dd>
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<dt>
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<code class="parameter">context</code></dt>
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<dd>
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<p class="para">
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<code class="parameter">context</code> 参数的说明见手册中的
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<a href="ref.stream.html" class="link">Streams API</a> 一章。
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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.scandir-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功则返回包含有文件名的 <span class="type"><a href="language.types.array.html" class="type array">array</a></span>，如果失败则返回
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<strong><code>FALSE</code></strong>。如果 <code class="parameter">directory</code>
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不是个目录，则返回布尔值 <strong><code>FALSE</code></strong> 并生成一条
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<strong><code>E_WARNING</code></strong> 级的错误。
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.scandir-changelog">
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<h3 class="title">更新日志</h3>
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<p class="para">
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<table class="doctable informaltable">
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<thead>
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<tr>
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<th>版本</th>
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<th>说明</th>
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</tr>
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</thead>
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<tbody class="tbody">
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<tr>
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<td>5.4.0</td>
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<td>
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<code class="parameter">sorting_order</code> now accepts constants. Any
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nonzero value caused descending order in previous versions.
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</td>
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</tr>
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</tbody>
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</table>
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.scandir-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-2754">
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<p><strong>Example #1 一个简单的 <span class="function"><strong>scandir()</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 />$dir </span><span style="color: #007700">= </span><span style="color: #DD0000">'/tmp'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$files1 </span><span style="color: #007700">= </span><span style="color: #0000BB">scandir</span><span style="color: #007700">(</span><span style="color: #0000BB">$dir</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$files2 </span><span style="color: #007700">= </span><span style="color: #0000BB">scandir</span><span style="color: #007700">(</span><span style="color: #0000BB">$dir</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$files1</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$files2</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] => .
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[1] => ..
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[2] => bar.php
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[3] => foo.txt
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[4] => somedir
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)
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Array
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(
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[0] => somedir
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[1] => foo.txt
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[2] => bar.php
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[3] => ..
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[4] => .
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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="example-2755">
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<p><strong>Example #2 <span class="function"><strong>scandir()</strong></span> 在 PHP 4 中的实现</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 />$dir </span><span style="color: #007700">= </span><span style="color: #DD0000">"/tmp"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$dh </span><span style="color: #007700">= </span><span style="color: #0000BB">opendir</span><span style="color: #007700">(</span><span style="color: #0000BB">$dir</span><span style="color: #007700">);<br />while (</span><span style="color: #0000BB">false </span><span style="color: #007700">!== (</span><span style="color: #0000BB">$filename </span><span style="color: #007700">= </span><span style="color: #0000BB">readdir</span><span style="color: #007700">(</span><span style="color: #0000BB">$dh</span><span style="color: #007700">))) {<br /> </span><span style="color: #0000BB">$files</span><span style="color: #007700">[] = </span><span style="color: #0000BB">$filename</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">sort</span><span style="color: #007700">(</span><span style="color: #0000BB">$files</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$files</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">rsort</span><span style="color: #007700">(</span><span style="color: #0000BB">$files</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$files</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] => .
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[1] => ..
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[2] => bar.php
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[3] => foo.txt
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[4] => somedir
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)
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Array
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(
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[0] => somedir
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[1] => foo.txt
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[2] => bar.php
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[3] => ..
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[4] => .
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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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</div>
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<div class="refsect1 notes" id="refsect1-function.scandir-notes">
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<h3 class="title">注释</h3>
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<div class="tip"><strong class="tip">Tip</strong><p class="simpara">如已启用<a href="filesystem.configuration.html#ini.allow_url_fopen" class="link">fopen 包装器</a>，在此函数中， URL 可作为文件名。关于如何指定文件名详见 <span class="function"><a href="fopen.html" class="function">fopen()</a></span>。各种
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wapper 的不同功能请参见 <a href="wrappers.html" class="xref">支持的协议和封装协议</a>，注意其用法及其可提供的预定义变量。</p></div>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.scandir-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="opendir.html" class="function" rel="rdfs-seeAlso">opendir()</a> - 打开目录句柄</span></li>
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<li class="member"><span class="function"><a href="readdir.html" class="function" rel="rdfs-seeAlso">readdir()</a> - 从目录句柄中读取条目</span></li>
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<li class="member"><span class="function"><a href="glob.html" class="function" rel="rdfs-seeAlso">glob()</a> - 寻找与模式匹配的文件路径</span></li>
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<li class="member"><span class="function"><a href="is_dir.html" class="function" rel="rdfs-seeAlso">is_dir()</a> - 判断给定文件名是否是一个目录</span></li>
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<li class="member"><span class="function"><a href="sort.html" class="function" rel="rdfs-seeAlso">sort()</a> - 对数组排序</span></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> |