Php-Arrays function-array_intersect_key-use a key name to compare and calculate the intersection of Arrays

Array_intersect_key () use the key name to compare and calculate the intersection of Arrays

[Function]
This function returns an array,
This array contains all values in the array of array1 but not in any other parameter.
Scope of use]
Php5> php5.1.0.
[Use]
Array array_intersect_key (array array1, array array2 [, array...])
Array1/required/array 1
Array2/required/compared arrays must have at least one
Array.../optional/array for comparison
[Example]
[Php]
<? Php
// Define two arrays respectively
$ Array1 = array ("blue" => 6, "red" => 2, "green" => 3, "purple" => 4 );
$ Array2 = array ("green" => 5, "blue" => 6, "yellow" => 7, "cyan" => 8 );
Print_r (array_intersect_key ($ array1, $ array2 ));
/*
Array
(
[Blue] => 6
[Green] => 3
)*/
[Php]

 

Taken from zuodefeng's note