PHP-----文件系统的交互

本文讲解php中于文件交互中所使用的函数

代码示例

<html>
  <head>
   <title> File Detail </title>
  </head>
  <body>

<?php
 date_default_timezone_set("PRC");

$path = "/Library/WebServer/Documents/uploads/";
$file = basename($path);
echo "<h1>Details of file:".$file."</h1>";
echo "<h2>File Data</h2>";
echo 'File last accessed :  '.date('j F Y H i', fileatime($file)).'<br />';
echo 'File last modified :  '.date('j F Y H i', filemtime($file)).'<br />';

$user = posix_getpwuid(fileowner($file));
echo 'File owner:  '.$user['name'].'<br />';

$group = posix_getgrgid(filegroup($file));
echo 'File group:  '.$group['name'].'<br />';

echo 'File permissions:  '.decoct(fileperms($file)).'<br />';

echo 'File type:  '.filetype($file).'<br />';

echo 'File size:  '.filesize($file).'bytes<br />';

echo "<h2>File Tests</h2>";
echo 'is_dir:  '.(is_dir($file) ? 'true' : 'false').'<br />';
echo 'is_executable:  '.(is_executable($file) ? 'true' : 'false').'<br />';
echo 'is_file:  '.(is_file($file) ? 'true' : 'false').'<br />';
echo 'is_link:  '.(is_link($file) ? 'true' : 'false').'<br />';
echo 'is_readable:  '.(is_readable($file) ? 'true' : 'false').'<br />';
echo 'is_writable:  '.(is_writable($file) ? 'true' : 'false').'<br />';
?>

  </body>
</html>

运行结果

Details of file:uploads

File Data

File last accessed : 12 October 2016 10 42
File last modified : 12 October 2016 10 36
File owner: XXXX
File group: wheel
File permissions: 40777
File type: dir
File size: 170bytes
File Tests

is_dir: true
is_executable: true
is_file: false
is_link: false
is_readable: true
is_writable: true

详解

更改文件属性

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