Online PHP editor | output for 5HGLk

<?php $classType = [ ["class" => "1", "type" => "A"], ["class" => "2", "type" => "A"], ["class" => "3", "type" => "B"] ]; $clollege['studentDetails'] = [ ["grade" => "2", "hobbies" => ["A" , "B"] ], ["grade" => "2", "hobbies" => ["A" ] ], ["grade" => "3", "hobbies" => [ "C" ] ] ]; foreach($clollege['studentDetails'] as $key => &$val){ $grade = $val['grade']; $val['type'] = array_reduce($classType, function($r, $item) use ($grade){ return ($item['class'] == $grade) ? $item['type'] : $r; }); } print_r($clollege);