简单介绍PHP获取文件属性方法_PHP教程
- WBOY原创
- 2016-07-15 13:34:311153浏览
PHP获取文件属性之获取最近修改时间:
<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?php </span></span></span></li>
<li>
<span>$</span><span class="attribute">file</span><span> = </span><span class="attribute-value">'test.txt'</span><span>; </span>
</li>
<li class="alt"><span>echo date('r', <br>filemtime($file)); </span></li>
<li>
<span class="tag">?></span><span> </span>
</li>
</ol>
返回的说unix的时间戳,这在缓存技术常用.
相关PHP获取文件属性的还有获取上次被访问的时间fileatime(),filectime()当文件的权限，所有者，所有组或其它 inode 中的元数据被更新时间,fileowner()函数返回文件所有者
$owner = posix_getpwuid(fileowner($file));
(非window系统),ileperms()获取文件的权限,
<ol class="dp-xml">
<li class="alt"><span><span class="tag"><span> ?php </span></span></span></li>
<li>
<span>$</span><span class="attribute">file</span><span> = </span><span class="attribute-value">'dirlist.php'</span><span>; </span>
</li>
<li class="alt">
<span>$</span><span class="attribute">perms</span><span> = </span><span class="attribute-value">substr</span><span>(sprintf<br>('%o', fileperms($file))<br>, -4); </span>
</li>
<li><span>echo $perms; </span></li>
<li class="alt">
<span class="tag">?></span><span> </span>
</li>
<li><span> </span></li>
</ol>
filesize()返回文件大小的字节数:
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span> ?php </span></span></span></li> <li><span>// 输出类似：somefile.txt:<br> 1024 bytes </span></li> <li class="alt"> <span>$</span><span class="attribute">filename</span><span> = </span><span class="attribute-value">'somefile.txt'</span><span>; </span> </li> <li><span>echo $filename . ': ' <br>. filesize($filename) . ' bytes'; </span></li> <li class="alt"> <span class="tag">?></span><span> </span> </li> <li><span> </span></li> </ol>
PHP获取文件属性的全部信息有个返回数组的函数stat()函数:
<ol class="dp-xml"> <li class="alt"><span><span class="tag"><span> ?php </span></span></span></li> <li> <span>$</span><span class="attribute">file</span><span> = </span><span class="attribute-value">'dirlist.php'</span><span>; </span> </li> <li class="alt"> <span>$</span><span class="attribute">perms</span><span> = </span><span class="attribute-value">stat</span><span>($file); </span> </li> <li><span>var_dump($perms); </span></li> <li class="alt"> <span class="tag">?></span><span> </span> </li> <li><span> </span></li> </ol>
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