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112 lines
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HTML
112 lines
5.8 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>改变文件所属的组</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.chgrp" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">chgrp</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">chgrp</span> — <span class="dc-title">改变文件所属的组</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.chgrp-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>chgrp</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$filename</code></span>
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, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$group</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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尝试将文件 <code class="parameter">filename</code> 所属的组改成
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<code class="parameter">group</code>（通过组名或组 ID
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指定）。
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</p>
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<p class="para">
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只有超级用户可以任意修改文件的组，其它用户可能只能将文件的组改成该用户自己所在的组。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.chgrp-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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文件的路径。
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</p>
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</dd>
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<dt>
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<code class="parameter">group</code></dt>
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<dd>
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<p class="para">
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组的名称或数字。
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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.chgrp-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.chgrp-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-2762">
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<p><strong>Example #1 改变文件所属的组</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 />$filename </span><span style="color: #007700">= </span><span style="color: #DD0000">'shared_file.txt'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$format </span><span style="color: #007700">= </span><span style="color: #DD0000">"%s's Group ID @ %s: %d\n"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #0000BB">$format</span><span style="color: #007700">, </span><span style="color: #0000BB">$filename</span><span style="color: #007700">, </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'r'</span><span style="color: #007700">), </span><span style="color: #0000BB">filegroup</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">));<br /></span><span style="color: #0000BB">chgrp</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</span><span style="color: #007700">, </span><span style="color: #0000BB">8</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">clearstatcache</span><span style="color: #007700">(); </span><span style="color: #FF8000">// do not cache filegroup() results<br /></span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #0000BB">$format</span><span style="color: #007700">, </span><span style="color: #0000BB">$filename</span><span style="color: #007700">, </span><span style="color: #0000BB">date</span><span style="color: #007700">(</span><span style="color: #DD0000">'r'</span><span style="color: #007700">), </span><span style="color: #0000BB">filegroup</span><span style="color: #007700">(</span><span style="color: #0000BB">$filename</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 notes" id="refsect1-function.chgrp-notes">
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<h3 class="title">注释</h3>
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<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数不能作用于<a href="features.remote_files.html" class="link">远程文件</a>，被检查的文件必须是可通过服务器的文件系统访问的。</span></p></blockquote>
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<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">当启用
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<a href="features.safe_mode.html" class="link">安全模式</a>时，
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PHP 会检查被操作的文件或目录是否与被执行的脚本有相同的 UID（所有者）。</span></p></blockquote>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.chgrp-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="chown.html" class="function" rel="rdfs-seeAlso">chown()</a> - 改变文件的所有者</span></li>
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<li class="member"><span class="function"><a href="chmod.html" class="function" rel="rdfs-seeAlso">chmod()</a> - 改变文件模式</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> |