PHP：阵列从阵列变量除去specifed键

Question

我有一个数组，该数组项包含文件的名称和数组值将是包含sfile大小另一个数组，日期等

在这些数组列表，我想要仅存储xls和xlsx文件。我需要删除所有其他扩展名的文件。

PHP中是否有预定义的函数？

注：我有恒定变量此varaible包含等VAR_FILE_EXT =“XLS，XLSX，CSV”

[sample.xls] => Array (
      [size] => 3353 
      [uid] => 1012 
      [gid] => 1013 
      [permissions] => 33188 
      [atime] => 1338497357 
      [mtime] => 1338497357 
      [type] => 1 
     ) 

[sample.csv] => Array (
      [size] => 3353 
      [uid] => 1012 
      [gid] => 1013 
      [permissions] => 33188 
      [atime] => 1338497357 
      [mtime] => 1338497357 
      [type] => 1 
     ) 

[sample.txt] => Array (
      [size] => 3353 
      [uid] => 1012 
      [gid] => 1013 
      [permissions] => 33188 
      [atime] => 1338497357 
      [mtime] => 1338497357 
      [type] => 1 
     ) 

在这个例子中我想要只删除sample.txt的数组键和与其对应的值

。

Answer 1

$filtered = array_intersect_key(
    $array, 
    array_filter(array_keys($array), function ($name) { return preg_match('/\.xlsx?$/', $name); }) 
); 

Answer 2

$your_array = array(
    'sample.xls' => ... 
    'sample.csv' => ... 
    'sample.txt' => ... 
); 

$extensions = '/('.str_replace(', ', '|', $VAR_FILE_EXT).')$/i'; 
$new_array = array(); 

foreach ($your_array as $file => $stuff) { 
    if (preg_match($extensions, $file)) { 
     $new_array[$file] => $stuff; 
    } 
} 

然后使用$ new_array。