Search Filtering with PHP/MySQL

Question

I\'m trying to create a search/filtering option in my blood donor application. Where donor can be searched by sex, name, blood group or by selecting all three. Here is my code

Answer 1

There in Your code there is problem in query where condition . Here your query will be like select * from donar where by_name = "A" by_group = "N" there is No And/Or to make where condition properly. Please try code like given below.

$search_query = "SELECT * FROM donar";
$query_cond = "";

if($by_name !="") {
      $query_cond .= " name='$by_name'";
}
if($by_sex !="") {

      if(!empty($query_cond)){
          $query_cond .= " AND ";
       }

      $query_cond .= " sex='$by_sex'";
}

if($by_group !="") {

      if(!empty($query_cond)){
          $query_cond .= " AND ";
       }

      $query_cond .= " blood_group='$by_group'";
}

if($by_level !="") {

      if(!empty($query_cond)){
          $query_cond .= " OR ";
       }

      $query_cond .= " e_level='$by_level'";
 }

 if(!empty($query_cond)){
      $query_cond = " Where ".$query_cond;
      $search_query.$query_cond;
 }

Here in code First we take $query_cond variable empty and make condition according code. and manage AND operator according that. And in last if We found $query_cond not empty then add it to $select_query.

I hope it will be helpful for you.

thanks