PHP lstat( )用法及代碼示例

PHP中的lstat()函數用於返回有關文件或符號鏈接的信息。它收集文件的統計信息，該統計信息作為參數發送到lstat()函數。該函數返回一個數組，其中包含有關以下元素的信息：

• [0]或[dev]-設備號
• [1]或[ino]-索引節點編號
• [2]或[mode]-索引節點保護模式
• [3]或[nlink]-鏈接數
• [4]或[uid]-所有者的用戶ID
• [5]或[gid]-所有者的組ID
• [6]或[rdev]-Inode設備類型
• [7]或[size]-字節大小
• [8]或[atime]-上次訪問(如Unix時間戳記)
• [9]或[mtime]-最後修改時間(如Unix時間戳記)
• [10]或[ctime]-最後的inode更改(如Unix時間戳記)
• [11]或[blksize]-文件係統IO的塊大小(如果支持)
• [12]或[blocks]-分配的塊數

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)

使用的參數：
PHP中的lstat()函數接受一個參數。

• file:它是指定文件的必需參數。

返回值：
它返回一個包含上述元素的數組。

異常：

1. lstat()函數的結果因服務器而異。
2. 此函數的結果被緩存，因此使用clearstatcache()函數清除緩存。
3. 失敗時發出E_WARNING。

範例：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

以下示例程序旨在說明lstat()函數。

程序1:

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

輸出：

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')); 
?>

輸出：

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); 
?>

輸出：

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 )

相關文章： PHP - stat( )用法及代碼示例

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