How to create a dynamic WHERE clause [duplicate]

Answer 1

Try to build where array

$where = array();


if ((int) $studentID >0) {
   $where[] = " studentID = '{$studentID}' ";
}
if ((int) $QuestionId  >0) {
   $where[] = " QuestionId  = '{$QuestionId }' ";
}

and at end implode $where by AND statment

if (!empty($where)) 
$query['where'] = ' WHERE '. implode(' AND ', $where);

It's only a way. I did not debug this code.