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Sort bidimensional array by one of it keys

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Simple function that sorts a bi-dimensional array by one of it keys.

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  1. /**
  2.  * sort_array_by_key()
  3.  * 
  4.  * @param array $array
  5.  * @param string|int $key
  6.  * @return array
  7.  * 
  8.  * @author Alejo
  9.  */
  10. function array_sort_by_key($array, $key)
  11. {
  12.     $tmpArKeys = array();
  13.     foreach ($array as $ar_item)
  14.     {
  15.         $tmpArKeys[] = $ar_item[$key];
  16.     }
  17.     asort($tmpArKeys);
  18.  
  19.     $newAr = array();
  20.     foreach ($tmpArKeys as $n_key => $n_val)
  21.     {
  22.         $newAr[] = $array[$n_key];
  23.     }
  24.     return $newAr;
  25. }
  26.  
  27.  
  28. /// Example
  29.  
  30. $people = array(
  31.                 array(
  32.                 'Name' => 'John',
  33.                 'Lastname' => 'Doe',
  34.                 'E-mail' => '[email protected]'
  35.                 ),
  36.                 array(
  37.                 'Name' => 'Harry',
  38.                 'Lastname' => 'Potter',
  39.                 'E-mail' => '[email protected]'
  40.                 ),
  41.                 array(
  42.                 'Name' => 'Lady',
  43.                 'Lastname' => 'Gaga',
  44.                 'E-mail' => '[email protected]'
  45.                 )
  46.  
  47.                 );
  48.  
  49. $sorted_people = array_sort_by_key($people, 'Name');
  50. print_r($sorted_people);
  51.  
  52. /// Example output:
  53. /*
  54. Array
  55. (
  56.     [0] => Array
  57.         (
  58.             [Name] => Harry
  59.             [Lastname] => Potter
  60.             [E-mail] => [email protected]
  61.         )
  62.  
  63.     [1] => Array
  64.         (
  65.             [Name] => John
  66.             [Lastname] => Doe
  67.             [E-mail] => [email protected]
  68.         )
  69.  
  70.     [2] => Array
  71.         (
  72.             [Name] => Lady
  73.             [Lastname] => Gaga
  74.             [E-mail] => [email protected]
  75.         )
  76.  
  77. )
  78.  
  79. */

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