array_diff_key

Computes the difference of arrays using keys for comparison

array **array_diff_key** array $array array $arrays

Compares the keys from against the keys from and returns the difference. This function is like except the comparison is done on the keys instead of the values. array``arrays``array_diff

arrayThe array to compare from

arraysArrays to compare against

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

Voorbeeld: example

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

<?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));
?>

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));
?>

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

Opmerking: > 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]);

array_diff``array_udiff``array_diff_assoc``array_diff_uassoc``array_udiff_assoc``array_udiff_uassoc``array_diff_ukey``array_intersect``array_intersect_assoc``array_intersect_uassoc``array_intersect_key``array_intersect_ukey

Vorige ← array_diff_assoc Volgende array_diff_uassoc →

array_diff_key

array_diff_key

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