PHP - Function array_intersect_ukey()

Syntax

array_intersect_ukey ( $array1, $array2 [, $array3..., callback $key_compare_func] );

Definition and Usage

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

Parameters

Return Values

It returns FALSE if there is any error.

Example

Try out following example −

<?php
   function key_compare_func($k1, $k2) {
      if ($k1 == $k2)
         return 0;
      
      else if ($k1 > $k2)
         return 1;
      
      else
         return -1;
   }
	
   $input1 = array('blue'=>1, 'red'=>2, 'green'=>3, 'purple'=>4);
   $input2 = array('green'=>5, 'blue'=>6, 'pink'=>7, 'black'=>8);
   
   $result = array_intersect_ukey($input1, $input2, "key_compare_func");
   var_dump($result);
?> 

This will produce the following result −

array(2) {
  ["blue"]=>
  int(1)
  ["green"]=>
  int(3)
}