array_diff_key

(PHP 5 >= 5.1.0, PHP 7)

array_diff_keyComputes the difference of arrays using keys for comparison

Descrierea

array_diff_key ( array $array1 , array $array2 [, array $... ] ) : array

Compares the keys from array1 against the keys from array2 and returns the difference. This function is like array_diff() except the comparison is done on the keys instead of the values.

Parametri

array1

The array to compare from

array2

An array to compare against

...

More arrays to compare against

Valorile întoarse

Returns an array containing all the entries from array1 whose keys are absent from all of the other arrays.

Exemple

Example #1 array_diff_key() example

The two keys from the key => value pairs are considered equal only if (string) $key1 === (string) $key2 . In other words a strict type check is executed so the string representation must be the same.

<?php
$array1 
= array('blue' => 1'red' => 2'green' => 3'purple' => 4);
$array2 = array('green' => 5'yellow' => 7'cyan' => 8);

var_dump(array_diff_key($array1$array2));
?>

Exemplul de mai sus va afișa:

array(3) {
  ["blue"]=>
  int(1)
  ["red"]=>
  int(2)
  ["purple"]=>
  int(4)
}
<?php
$array1 
= array('blue' => 1'red'  => 2'green' => 3'purple' => 4);
$array2 = array('green' => 5'yellow' => 7'cyan' => 8);
$array3 = array('blue' => 6'yellow' => 7'mauve' => 8);

var_dump(array_diff_key($array1$array2$array3));
?>

Exemplul de mai sus va afișa:

array(2) {
  ["red"]=>
  int(2)
  ["purple"]=>
  int(4)
}

Note

Notă:

This function only checks one dimension of a n-dimensional array. Of course you can check deeper dimensions by using array_diff_key($array1[0], $array2[0]);.

A se vedea și

  • array_diff() - Calculează diferența dintre tablouri
  • array_udiff() - Computes the difference of arrays by using a callback function for data comparison
  • array_diff_assoc() - Computes the difference of arrays with additional index check
  • array_diff_uassoc() - Computes the difference of arrays with additional index check which is performed by a user supplied callback function
  • array_udiff_assoc() - Computes the difference of arrays with additional index check, compares data by a callback function
  • array_udiff_uassoc() - Computes the difference of arrays with additional index check, compares data and indexes by a callback function
  • array_diff_ukey() - Computes the difference of arrays using a callback function on the keys for comparison
  • array_intersect() - Computes the intersection of arrays
  • array_intersect_assoc() - Computes the intersection of arrays with additional index check
  • array_intersect_uassoc() - Computes the intersection of arrays with additional index check, compares indexes by a callback function
  • array_intersect_key() - Computes the intersection of arrays using keys for comparison
  • array_intersect_ukey() - Computes the intersection of arrays using a callback function on the keys for comparison

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top