php-Arrays function-array_intersect-calculate the intersection of arrays_PHP tutorial

array_intersect() calculates the intersection of arrays

【Function】
This function will return an array,
This array contains the values ​​of all keys that are in array1 but are not in any other parameter array.
                                                                                                    Note that the key names remain unchanged
【Scope of use】
​​​​​ php 4>4.0.1, php5.
【Use】
array array_intersect_ukey( array array1, array array2[,array...] )
           array1/required/array1
           array2/required/comparable array must have at least one
           array.../optional/array used for comparison
【Example】
[php]
//Define two arrays respectively
$array1 = array("blue"=>5,"red"=>2,"green"=>3,"purple"=>4);
$array2 = array("green"=>5,"blue"=>6,"yellow"=>7,"cyan"=>8);
var_dump(array_intersect( $array1,$array2));
/*
array(1) {
["blue"]=>
int(5)
}
*/

Excerpted from zuodefeng’s notes