check associative array contains value

Question

    Array (    
    [0] => Array ( 
               [questionID] => 47
               [surveyID] => 51
               [userID] => 31 
               [question         


        

Answer 1

foreach($mainarray as $array ){ //check for each 
  if($array['required']==1)
   //doSome Task
  if($array['required']==0)