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257 lines
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257 lines
12 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>给出文件的信息</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.stat" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">stat</h1>
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<p class="verinfo">(PHP 4, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">stat</span> — <span class="dc-title">给出文件的信息</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.stat-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>stat</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="type">array</span></div>
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<p class="para rdfs-comment">
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获取由 <code class="parameter">filename</code> 指定的文件的统计信息。如果
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<code class="parameter">filename</code>
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是符号连接，则统计信息是关于被连接文件本身的，而不是符号连接。
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</p>
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<p class="para">
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<span class="function"><a href="lstat.html" class="function">lstat()</a></span>
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和 <span class="function"><strong>stat()</strong></span> 相同，只除了它会返回符号连接的状态。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.stat-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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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.stat-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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<table class="doctable table">
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<caption><strong><span class="function"><strong>stat()</strong></span> 和 <span class="function"><a href="fstat.html" class="function">fstat()</a></span> 返回格式</strong></caption>
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<thead>
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<tr>
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<th>数字下标</th>
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<th>关联键名（自 PHP 4.0.6）</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>0</td>
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<td>dev</td>
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<td>device number - 设备名</td>
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</tr>
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<tr>
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<td>1</td>
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<td>ino</td>
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<td>inode number - inode 号码</td>
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</tr>
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<tr>
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<td>2</td>
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<td>mode</td>
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<td>inode protection mode - inode 保护模式</td>
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</tr>
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<tr>
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<td>3</td>
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<td>nlink</td>
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<td>number of links - 被连接数目</td>
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</tr>
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<tr>
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<td>4</td>
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<td>uid</td>
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<td>userid of owner - 所有者的用户 id</td>
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</tr>
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<tr>
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<td>5</td>
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<td>gid</td>
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<td>groupid of owner- 所有者的组 id</td>
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</tr>
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<tr>
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<td>6</td>
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<td>rdev</td>
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<td>device type, if inode device * - 设备类型，如果是 inode 设备的话</td>
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</tr>
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<tr>
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<td>7</td>
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<td>size</td>
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<td>size in bytes - 文件大小的字节数</td>
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</tr>
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<tr>
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<td>8</td>
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<td>atime</td>
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<td>time of last access (unix timestamp) - 上次访问时间（Unix 时间戳）</td>
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</tr>
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<tr>
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<td>9</td>
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<td>mtime</td>
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<td>time of last modification (unix timestamp) - 上次修改时间（Unix 时间戳）</td>
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</tr>
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<tr>
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<td>10</td>
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<td>ctime</td>
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<td>time of last change (unix timestamp) - 上次改变时间（Unix 时间戳）</td>
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</tr>
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<tr>
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<td>11</td>
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<td>blksize</td>
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<td>blocksize of filesystem IO * - 文件系统 IO 的块大小</td>
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</tr>
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<tr>
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<td>12</td>
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<td>blocks</td>
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<td>number of blocks allocated - 所占据块的数目</td>
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</tr>
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</tbody>
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</table>
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* Windows 下总是 0。
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</p>
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<p class="para">
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* - 仅在支持 st_blksize 类型的系统下有效。其它系统（如 Windows）返回 -1。
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</p>
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<p class="para">
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如果出错，<span class="function"><strong>stat()</strong></span> 返回 <strong><code>FALSE</code></strong>。
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">
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因为 PHP 的整数类型是有符号整型而且很多平台使用 32 位整型，对 2GB
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以上的文件，一些文件系统函数可能返回无法预期的结果 。</span></p></blockquote>
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</div>
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<div class="refsect1 errors" id="refsect1-function.stat-errors">
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<h3 class="title">错误／异常</h3>
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<p class="para">
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错误时会产生 <strong><code>E_WARNING</code></strong> 级别的错误。
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</p>
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</div>
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<div class="refsect1 changelog" id="refsect1-function.stat-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>4.0.6</td>
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<td>
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返回一个数组包含有文件的统计信息，该数组具有以下列出的单元，数组下标从零开始。除了数字索引之外自还可以通过关联索引来访问。
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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.stat-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-2844">
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<p><strong>Example #1 <span class="function"><strong>stat()</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 /></span><span style="color: #FF8000">/* Get file stat */<br /></span><span style="color: #0000BB">$stat </span><span style="color: #007700">= </span><span style="color: #0000BB">stat</span><span style="color: #007700">(</span><span style="color: #DD0000">'C:\php\php.exe'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/*<br /> * Print file access time, this is the same <br /> * as calling fileatime()<br /> */<br /></span><span style="color: #007700">echo </span><span style="color: #DD0000">'Access time: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">$stat</span><span style="color: #007700">[</span><span style="color: #DD0000">'atime'</span><span style="color: #007700">];<br /><br /></span><span style="color: #FF8000">/*<br /> * Print file modification time, this is the <br /> * same as calling filemtime()<br /> */<br /></span><span style="color: #007700">echo </span><span style="color: #DD0000">'Modification time: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">$stat</span><span style="color: #007700">[</span><span style="color: #DD0000">'mtime'</span><span style="color: #007700">];<br /><br /></span><span style="color: #FF8000">/* Print the device number */<br /></span><span style="color: #007700">echo </span><span style="color: #DD0000">'Device number: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">$stat</span><span style="color: #007700">[</span><span style="color: #DD0000">'dev'</span><span style="color: #007700">];<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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</div>
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</p>
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<p class="para">
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<div class="example" id="example-2845">
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<p><strong>Example #2 Using <span class="function"><strong>stat()</strong></span> information together with <span class="function"><a href="touch.html" class="function">touch()</a></span></strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">/* Get file stat */<br /></span><span style="color: #0000BB">$stat </span><span style="color: #007700">= </span><span style="color: #0000BB">stat</span><span style="color: #007700">(</span><span style="color: #DD0000">'C:\php\php.exe'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* Did we failed to get stat information? */<br /></span><span style="color: #007700">if (!</span><span style="color: #0000BB">$stat</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">'stat() call failed...'</span><span style="color: #007700">;<br />} else {<br /> </span><span style="color: #FF8000">/*<br /> * We want the access time to be 1 week <br /> * after the current access time.<br /> */<br /> </span><span style="color: #0000BB">$atime </span><span style="color: #007700">= </span><span style="color: #0000BB">$stat</span><span style="color: #007700">[</span><span style="color: #DD0000">'atime'</span><span style="color: #007700">] + </span><span style="color: #0000BB">604800</span><span style="color: #007700">;<br /><br /> </span><span style="color: #FF8000">/* Touch the file */<br /> </span><span style="color: #007700">if (!</span><span style="color: #0000BB">touch</span><span style="color: #007700">(</span><span style="color: #DD0000">'some_file.txt'</span><span style="color: #007700">, </span><span style="color: #0000BB">time</span><span style="color: #007700">(), </span><span style="color: #0000BB">$atime</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'Failed to touch file...'</span><span style="color: #007700">;<br /> } else {<br /> echo </span><span style="color: #DD0000">'touch() returned success...'</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 notes" id="refsect1-function.stat-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">注意：不同文件系统对时间的判断方法可能是不相同的。</p></p></blockquote>
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<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数的结果会被缓存。参见
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<span class="function"><a href="clearstatcache.html" class="function">clearstatcache()</a></span> 以获得更多细节。</span></p></blockquote>
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<div class="tip"><strong class="tip">Tip</strong><p class="simpara">自 PHP 5.0.0 起, 此函数也用于<em class="emphasis">某些</em>
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URL 包装器。请参见 <a href="wrappers.html" class="xref">支持的协议和封装协议</a>以获得支持 <span class="function"><strong>stat()</strong></span> 系列函数功能的包装器列表。</p></div>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.stat-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="lstat.html" class="function" rel="rdfs-seeAlso">lstat()</a> - 给出一个文件或符号连接的信息</span></li>
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<li class="member"><span class="function"><a href="fstat.html" class="function" rel="rdfs-seeAlso">fstat()</a> - 通过已打开的文件指针取得文件信息</span></li>
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<li class="member"><span class="function"><a href="filemtime.html" class="function" rel="rdfs-seeAlso">filemtime()</a> - 取得文件修改时间</span></li>
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<li class="member"><span class="function"><a href="filegroup.html" class="function" rel="rdfs-seeAlso">filegroup()</a> - 取得文件的组</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> |