php-Arrays function-array_diff_assoc-calculates the difference of arrays with index check_PHP tutorial

array_diff_assoc() function calculates the difference set of arrays with index check

【Function】
This function will return an array,
This array contains all values ​​in array1 that are not in any other parameter array.
【Scope of use】
           >=4.3.0, php5
【Use】
array array_diff_assoc( 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]

          $arr1 = array( "key1" => "val1", "key2" => "val2" );
          $arr2 = array( "key1" => "val1", "key3" => "val2" );
          $arr3 = array( "key2" => "val2" );
            print_r( array_diff_assoc( $arr1, $arr2 ) );
            print_r( array_diff_assoc( $arr1, $arr3 ) );
            print_r( array_diff_assoc( $arr1, $arr2, $arr3 ) );
/*
Array
(
[key2] => val2
)
Array
(
[key1] => val1
)
Array
(
)
*/

Excerpted from zuodefeng’s notes