PHP - Function array_intersect_key()


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Syntax

array array_intersect_key ( array $array1, array $array2 [, array $array3 ...] );

Definition and Usage

Returns an array containing all the values of array1 which have matching keys that are present in all the arguments.

Parameters

Sr.No Parameter & Description
1

array1

Required. The first array is the array that the others will be compared with.

2

array2

Required. An array to be compared with the first array

3

array3

Optional. An array to be compared with the first array

Return Values

Returns FALSE if there is any error.

Example

Try out following example −

<?php
   $array1 = array('blue'  => 1, 'red'  => 2, 'green'  => 3 );
   $array2 = array('green' => 4, 'blue' => 5, 'yellow' => 6,);
   
   $result = array_intersect_key($array1, $array2);
   print_r($result);
?> 

This will produce the following result −

Array ( [blue]  => 1 [green] => 3 )

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