This is a simple way to get a subset of associative array elements using an array of keys; basically you extract out the elements you want from a bigger array by listing the keys you need.
| <?php | |
| $associative_array = ['firstname' => 'John', 'lastname' => 'Smith', 'DOB' => '2000-10-10', 'country' => 'Ireland' ]; | |
| $subset = array_intersect_key( $associative_array, array_flip( [ 'lastname', 'country' ] ) ); | |
| print_r( $subset ); | |
| // Outputs… | |
| // Array ( [lastname] => Smith [country] => Ireland ); |
I have come by this before when searching an associative array using a wildcard.
