PHP查询中的MySQL语法错误未显示在浏览器中

Question

Let's say that I have an error in a php/mysql query :

$query = "SELECT * ROM users WHERE _id = :user_id";

Here, FROM is missing an "F". When I launch this php file in localhost, my browser is not reacting, it should display something like that:

You have an error in your SQL syntax; check the manual that corresponds to your MySQL server 

But it doesn't, only blank page... How do I enable this option?

EDIT: I'm using PDO.

Answer 1

• If you use mysql_* functions you have to do something like: mysql_query($sql) or die(mysql_error());
• If you use mysqli_* : mysqli_query($sql) or die(mysqli_error());
• If you use PDO : $stmt->execute() or die(print_r($stmt->errorInfo)); //$stmt is instance of PDOStatemen $stmt->execute() or die(print_r($stmt->errorInfo)); //$stmt is instance of PDOStatemen

If you still use mysql_* I strongly recommend to stop using (sql injection I mean).

Answer 2

• First use mysql_error() function in your code in case if query is not executed successfully. something like this :

   if(!mysql_query($query)){ echo mysql_error(); } 

• Secondly, check in your php.ini whether error_reporting is on or off.

Then check on the browser for the error.