PHP array_uintersect_uassoc() function

The array_uintersect_uassoc function compares keys and values of two or more arrays based on a user-defined key and value comparison function and returns the matching results.

This function uses two user-defined functions, the first user-defined function takes the keys and the second takes the values.

What is the syntax of the array_uintersect_uassoc function in PHP?

array_uintersect_uassoc(array1, array2, array3, ..., myfunc_key, myfunc_value)

Parameters	Details
array1	The first array to compare with other arrays – required
array2	Second array to make a comparison against- required
array3, ...	Further arrays to compare against – optional
user-defined keys function	User-defined function to compare the keys of arrays. The function must return an integer <, = or > than 0 if the first argument is <, + or > than the second argument.
user-defined values function	User-defined function to compare the values of arrays. The function must return an integer <, = or > than 0 if the first argument is <, + or > than the second argument.

Example of array_uintersect_uassoc function

Example 1. Compare keys and values of two arrays using a built-in function for the comparison of keys and a user-defined function for the comparison of values and return the matches.

<?php
function my_key_function($x,$y)
{
if ($x==$y)
  {
  return 0;
  }
  return ($x>$y)?1:-1;
}

function my_value_function($x,$y)
{
if ($x==$y)
  {
  return 0;
  }
  return ($x>$y)?1:-1;
}
$array_1=array("a"=>"R","b"=>"G","c"=>"B");
$array_2=array("a"=>"R","b"=>"B","c"=>"G");

$result=array_uintersect_uassoc($array_1,$array_2,"my_key_function", "my_value_function");
print_r($result);
?>