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PHP Integrating PHP with Databases Using Relational Tables Preparing SQL Statements

Daniel Malek
Daniel Malek
20,140 Points
Posted by Daniel Malek
Daniel Malek
20,140 Points

use string variable and placeholders with mysql

My function works but

function alphabetical_car_list ($subsection) { include("dbconnection.php"); try { $results = $db->prepare( ' select * from ram_cars WHERE car_reg LIKE "'.$subsection.'%" ); $results->bindParam(1,$subsection,PDO::PARAM_STR, 12); $results->execute(); } catch(Exception $e) { echo "error: " . $e->getMessage(); } $cars = $results-> fetchAll(PDO::FETCH_ASSOC); return $cars;

}

if I use placeholder like that

function alphabetical_car_list ($subsection) { include("dbconnection.php"); try { $results = $db->prepare( ' select * from ram_cars WHERE car_reg LIKE "?%" ' ); $results->bindParam(1,$subsection,PDO::PARAM_STR, 12); $results->execute(); } catch(Exception $e) { echo "error: " . $e->getMessage(); } $cars = $results-> fetchAll(PDO::FETCH_ASSOC); return $cars;

}

it returns an empty array. I tried many combinations of double and single quotation marks. But my mistake might be somewhere else.

Ashish Mehra
Ashish Mehra
Courses Plus Student 33 Points

Hey Daniel Malek, Try to write script using bindValue

  function alphabetical_car_list ($subsection) { 
include("dbconnection.php");
 try { 
 $results = $db->prepare( ' select * from ram_cars WHERE car_reg LIKE  ? ' ); 
 $results->bindValue(1,$subsection."%",PDO::PARAM_STR); 
 $results->execute();
  } catch(Exception $e) { 
  echo "error: " . $e->getMessage(); 
  } 
  $cars = $results-> fetchAll(PDO::FETCH_ASSOC);
   return $cars;

}

1 Answer

Daniel Malek
Daniel Malek
20,140 Points
Daniel Malek
Daniel Malek
20,140 Points

works perfectly :) Thank You Ashish Mehra