Question

I have the following line of code :

mysql_query("SELECT name FROM details WHERE md5(name) = '".md5($input_name)."'");

This query works just fine , however , when i change the query to the following :

mysql_query("SELECT name FROM details WHERE salt(name) = '".salt($input_name)."'");

The query doesn’t seem to work.

The salt function is as follows :

function salt ($name) {


global $salt;



return $salt.$name;

}

where $salt is a global variable ( an md5 hash)

Why doesn’t the second query work ?

Answer 1

MySQL has no access to functions you define in PHP. You can only use functions that MySQL defines in a MySQL query, or functions that you have written in SQL. You’ll have to rethink what you’re doing and express it in a way that does not require MySQL to use PHP functions.