array_intersect_key

PHP 5 >= 5.1.0, PHP 7, PHP 8
array_intersect_key - Computes the intersection of arrays using keys for comparison
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array_intersect_key( array$array, ... array$arrays ): array

array_intersect_key returns an array containing all the entries of array which have keys that are present in all the arguments.

Parameters

array

The array with master keys to check.

arrays

Arrays to compare keys against.

Return Values

Returns an associative array containing all the entries of array which have keys that are present in all arguments.

Related Functions

  • array_diff_assoc - Computes the difference of arrays with additional index check
  • array_diff_key - Computes the difference of arrays using keys for comparison
  • array_diff_uassoc - Computes the difference of arrays with additional index check which is performed by a user supplied callback function
  • array_diff_ukey - Computes the difference of arrays using a callback function on the keys for comparison
  • array_diff - Computes the difference 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_ukey - Computes the intersection of arrays using a callback function on the keys for comparison
  • array_intersect - Computes the intersection of arrays
  • 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_udiff - Computes the difference of arrays by using a callback function for data comparison

Example of array_intersect_key

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Function array_intersect_key:

Arrays Functions

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