Get a subset of an array based on an array of keys

Question

I wrote this function to get a subset of an array. Does php have a built in function for this. I can\'t find one in the docs. Seems like a waste if I\'m reinventing the whee

Answer 1

There is no direct function I think in PHP to get a subset from an array1 with compare to another array2 where the values are the list of key name which we fetch.

Like: array_only($array1, 'field1','field2');

But this way can be achieved the same.

 '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 );