php - Preg_match only working in order -

i having problems following code. getting users subjects using $_get sending server see if row contains subjects , if returns subject matches row each row matches. works fine if user enters lets "english,maths" , in database listed "maths, english" fail , not echo row although correct in different order. there doing wrong??

thanks,

curtisb

    $subjects = $_get["subjects"];       while ($row = mysql_fetch_array($result, mysql_assoc) , ($counter < $max))      {        if(preg_match('/'.$subjects.'/',$row['subjects'])){        echo "subject matches row";                  }     } 

update: tried code below, echoing every row if not correct subject.

 function is_matched($subjectsfromus, $subjectsfromdb){         $subjectsfromus = explode($subjectsfromus, ',');         $subjectsfromdb = explode($subjectsfromdb, ',');         foreach($subjects $s){             if(!in_array($s, subjectsfromdb))                 return false;         }         return true;     }   while ($row = mysql_fetch_array($result, mysql_assoc) , ($counter < $max))  {    if(is_matched($subjects,$row['subjects']) == true ){  echo "subjects matched"; } } 

i think shouldn't use regexp in such case. must explode $subjects parameter ',' , traverse array trough $row['subjects']:

  function is_matched($subjects, $subjectsfromdb){         $subjects = explode(',', $subjects);         $subjectsfromdb = explode(',', $subjectsfromdb);         foreach($subjects $s){             if(!in_array($s, $subjectsfromdb))                 return false;         }         return true;     }