php - How can I get the key intersect of two arrays? -

i have 2 arrays shown blow

//array 1 array (     [0] => 223     [1] => 216 )  /array 2 array (     [221] => bakers     [220] => construction     [223] => information technology     [216] => jewellery     [217] => photography     [222] => retailers ) 

i want text key (values) of first array matches second array (keys).

expected result:

information technology, jewellery 

$result = array(); foreach( $array1 $index ) {   $result[] = $array2[ $index ]; } echo implode( ', ', $result );