### Q(Question):

I have a question but not a problem.

I have 2 arrays.

$array_1 = array("a", "b");

$array_2 = array("a" => "x1", "b" => "x2", "c" => "x3");

Is there php function that would return array("a" => "x1", "b" => "x2") if passed $array_1 and $array_2 or I have to write it. Looked at the manual and couldn’t find it.

Thanks

### A(Answer):

you dont need a whole new function

` array_intersect_key($array_2, array_flip($array_1)); `

### A(Answer):

Try array_intersect_key() for this one

array array_intersect_key ( array array1, array array2 [, array …] )

array_intersect_key() returns an array containing all the values of array1 which have matching keys that are present in all the arguments.

But you will need to array_flip() $array1 to make values the key. So…

` array_intersect_key($array2,array_filp($array1); `

..I think

### A(Answer):

Ive tested that, it works.

### A(Answer):

Excellent

Thank you

### A(Answer):

Dormilich. You pipped me by one minute. But same solution.

### A(Answer):

its the obvious solution, after all.