3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $A = [3,45,67,8]; $B = [ 1 => [1,6,8], 2 => [5,67,3,4,5,66,6], 3 => [55,56,57,58], 4 => [45,80,81,82] ]; $result = []; foreach ($A as $needle) { if ($found = array_keys($B, $needle)) { // something qualified echo "\nFound: "; var_export($found); //$result = array_merge($result, $found); // store the new key(s) //$B = array_intersect_key($B, $found); // reduce the haystack } //echo "Needle: $needle\n"; //var_export($B); //echo "\n--\n"; //var_export($result); //echo "\n----\n"; }
based on h4LJ2
Output for 5.6.38 - 7.3.0rc3