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docs/php/xattr_list.html
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docs/php/xattr_list.html
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<!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>Get a list of extended attributes</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.xattr-list" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">xattr_list</h1>
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<p class="verinfo">(PECL xattr >= 0.9.0)</p><p class="refpurpose"><span class="refname">xattr_list</span> — <span class="dc-title">
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Get a list of extended attributes
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</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.xattr-list-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>xattr_list</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$flags</code><span class="initializer"> = 0</span></span>
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] ) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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This functions gets a list of names of extended attributes of a file.
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</p>
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<p class="para">扩展的属性有两种 不同的命名空间：user
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和 root。user 命名空间对所有用户均有效，而 root
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命名空间仅对拥有 root 权限的用户有效。
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xattr 默认在 user 命名空间上操作，但可使用
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<code class="parameter">flags</code> 参数进行更改。</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.xattr-list-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">filename</code></dt>
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<dd>
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<p class="para">
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The path of the file.
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</p>
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</dd>
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<dt>
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<code class="parameter">flags</code></dt>
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<dd>
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<p class="para">
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<table class="doctable table">
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<caption><strong>Supported xattr flags</strong></caption>
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<tbody class="tbody">
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<tr>
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<td><strong><code>XATTR_DONTFOLLOW</code></strong></td>
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<td>Do not follow the symbolic link but operate on symbolic link itself.</td>
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</tr>
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<tr>
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<td><strong><code>XATTR_ROOT</code></strong></td>
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<td>Set attribute in root (trusted) namespace. Requires root privileges.</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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</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.xattr-list-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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This function returns an array with names of extended attributes.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.xattr-list-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-2858">
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<p><strong>Example #1 Prints names of all extended attributes of file</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 />$file </span><span style="color: #007700">= </span><span style="color: #DD0000">'some_file'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$root_attributes </span><span style="color: #007700">= </span><span style="color: #0000BB">xattr_list</span><span style="color: #007700">(</span><span style="color: #0000BB">$file</span><span style="color: #007700">, </span><span style="color: #0000BB">XATTR_ROOT</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$user_attributes </span><span style="color: #007700">= </span><span style="color: #0000BB">xattr_list</span><span style="color: #007700">(</span><span style="color: #0000BB">$file</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #DD0000">"Root attributes: \n"</span><span style="color: #007700">;<br />foreach (</span><span style="color: #0000BB">$root_attributes </span><span style="color: #007700">as </span><span style="color: #0000BB">$attr_name</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$attr_name</span><span style="color: #007700">);<br />}<br /><br />echo </span><span style="color: #DD0000">"\n User attributes: \n"</span><span style="color: #007700">;<br />foreach (</span><span style="color: #0000BB">$attributes </span><span style="color: #007700">as </span><span style="color: #0000BB">$attr_name</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"%s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$attr_name</span><span style="color: #007700">);<br />}<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.xattr-list-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="xattr_get.html" class="function" rel="rdfs-seeAlso">xattr_get()</a> - Get an extended attribute</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>
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