A brief introduction to the method of obtaining file attributes in PHP_PHP tutorial

PHP Get file attributes to get the latest modification time:

<ol class="dp-xml"><li class="alt"><span><span class="tag"><</span><span> ?php  </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></span></li></ol>

Return Speaking of Unix timestamps, this is commonly used in caching technology.

Related PHP acquisition of file attributes also includes obtaining the last access time fileatime(), filectime() when the file permissions, owner, owner The time when the metadata in the group or other inodes is updated, the fileowner() function returns the file owner

$owner = posix_getpwuid(fileowner($file));

(non-window system), ileperms() gets the permissions of the file,

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><</span><span> ?php  </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></span></li>
<li><span> </span></li>
</ol>

filesize() returns the number of bytes of the file size:

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><</span><span> ?php  </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></span></li>
<li><span> </span></li>
</ol>

PHP has a function stat() function that returns an array to get all the information about file attributes:

<ol class="dp-xml">
<li class="alt"><span><span class="tag"><</span><span> ?php  </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></span></li>
<li><span> </span></li>
</ol>

http://www.bkjia.com/PHPjc/445971.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/445971.htmlTechArticlePHP gets file attributes to get the latest modification time: ?php $ file = 'test.txt' ; echodate(' r', filemtime($file)); ? Returns the unix timestamp, which is commonly used in caching technology. Related PHP acquisition...