Question

I’ve a PHP application that works with MySQL through PDO. I have a table with different records and I have to prevenet inserting a duplicate one. But when I want to check existing items, select statement does not return a true value. This is my code:

$sql = "SELECT COUNT(id) FROM tbl_product_category1 WHERE title = '?'";
$q = $db->prepare($sql);
$q->execute(array($title));
if ($q->fetchColumn() == 0)
{
    ...

I also tested this one:

$sql = "SELECT id FROM tbl_product_category1 WHERE title = '?'";
$q = $db->prepare($sql);
$q->execute(array($title));
$rows = $q->rowCount();
if ($rows == 0)
{
    ...

Imagine $title=1. I have 4 records with this value. But I can not see anything in SELECT statement. What is wrong here ?

Answer 1

try this: (don’t wrap the value of the title with single quotes)

$sql = "SELECT COUNT(id) FROM tbl_product_category1 WHERE title = ? ";