PHP lstat( )用法及代码示例

PHP中的lstat()函数用于返回有关文件或符号链接的信息。它收集文件的统计信息，该统计信息作为参数发送到lstat()函数。该函数返回一个数组，其中包含有关以下元素的信息：

• [0]或[dev]-设备号
• [1]或[ino]-索引节点编号
• [2]或[mode]-索引节点保护模式
• [3]或[nlink]-链接数
• [4]或[uid]-所有者的用户ID
• [5]或[gid]-所有者的组ID
• [6]或[rdev]-Inode设备类型
• [7]或[size]-字节大小
• [8]或[atime]-上次访问(如Unix时间戳记)
• [9]或[mtime]-最后修改时间(如Unix时间戳记)
• [10]或[ctime]-最后的inode更改(如Unix时间戳记)
• [11]或[blksize]-文件系统IO的块大小(如果支持)
• [12]或[blocks]-分配的块数

注意：

This function is similar to stat(), except that if the file parameter is a symbolic link, the status of the symlink is return not the status of the file pointed to by the symlink.

用法:

lstat(file)

使用的参数：
PHP中的lstat()函数接受一个参数。

• file:它是指定文件的必需参数。

返回值：
它返回一个包含上述元素的数组。

异常：

1. lstat()函数的结果因服务器而异。
2. 此函数的结果被缓存，因此使用clearstatcache()函数清除缓存。
3. 失败时发出E_WARNING。

范例：1

Input:print_r(lstat("gfg.txt"));

Output:
Array
(
[0] => 0
[1] => 0
[2] => 33206
[3] => 1
[4] => 0
[5] => 0
[6] => 0
[7] => 92
[8] => 1141633430
[9] => 1141298003
[10] => 1138609592
[11] => -1
[12] => -1
[dev] => 0
[ino] => 0
[mode] => 33206
[nlink] => 1
[uid] => 0
[gid] => 0
[rdev] => 0
[size] => 92
[atime] => 1141633430
[mtime] => 1141298003
[ctime] => 1138609592
[blksize] => -1
[blocks] => -1
)

示例：2

Input:symlink('gfg.php', 'gfg');
        array_diff(stat('gfg'), lstat('gfg'));
Output:
Array
(
    [ino] => 97236376
    [mode] => 33188
    [size] => 34
    [atime] => 1223580003
    [mtime] => 1223581848
    [ctime] => 1223581848
    [blocks] => 8
)

Explanation:Difference of the resluts of stat() and lstat() function

以下示例程序旨在说明lstat()函数。

程序1:

<?php  
// displaying information using lstat() function 
print_r(lstat("gfg.txt")); 
?>

输出：

Array
(
[0] => 0
[1] => 0
[2] => 33206
[3] => 1
[4] => 0
[5] => 0
[6] => 0
[7] => 92
[8] => 1141633430
[9] => 1141298003
[10] => 1138609592
[11] => -1
[12] => -1
[dev] => 0
[ino] => 0
[mode] => 33206
[nlink] => 1
[uid] => 0
[gid] => 0
[rdev] => 0
[size] => 92
[atime] => 1141633430
[mtime] => 1141298003
[ctime] => 1138609592
[blksize] => -1
[blocks] => -1
)

程序2:

<?php  
  
// creating a symbolic link 
symlink('gfg.php', 'gfg'); 
  
// comparing information returned 
//  by stat() and lstat() function 
array_diff(stat('gfg'), lstat('gfg')); 
?>

输出：

Array
(
    [ino] => 97236376
    [mode] => 33188
    [size] => 34
    [atime] => 1223580003
    [mtime] => 1223581848
    [ctime] => 1223581848
    [blocks] => 8
)

程序3:

<?php  
// displaying information of  
// zip file using lstat() function 
$myfile = lstat("./gfg.zip"); 
echo($myfile); 
?>

输出：

Array (
[0] => 2161 
[1] => 18351063 
[2] => 33188 
[3] => 1 
[4] => 1036 
[5] => 1036 
[6] => 0 
[7] => 270081 
[8] => 1382409024 
[9] => 1382409631 
[10] => 1382409631 
[11] => 4096 
[12] => 528
[dev] => 2161 
[ino] => 18351063 
[mode] => 33188 
[nlink] => 1 
[uid] => 1036 
[gid] => 1036 
[rdev] => 0 
[size] => 270081 
[atime] => 1382409024 
[mtime] => 1382409631 
[ctime] => 1382409631 
[blksize] => 4096 
[blocks] => 528 )

相关文章： PHP - stat( )用法及代码示例

参考：
http://php.net/manual/en/function.lstat.php