Question

Hy,

I have a users table in mysql with username and alias set to UNIQUE .If i try to insert something that already is there i get the error : #1062 - Duplicate entry 'Ramocea' for key 'alias' which is good.

But i want to show the users messages like this :

Alias already exist in database and Username already exist in the database not that mysql_error .

Is there need for a check to the database and if $mysqi->num_rows > 0 - return false; ? Or is there a method to manipulate what mysql throws as error and replace the messages ?

Thank you very much …

Answer 1

If you want to do everything in one query:

if (!mysql_query("INSERT INTO table ...")) {
    switch (mysql_errno()) {
        case 1062:
           echo ""; // parse mysql_error() here for a key
           break;
        //case ...
    }
}

But I would recommend you to check for existing values beforehand:

$res = mysql_query("SELECT 1 FROM table WHERE unique_field = ...");
if (mysql_num_rows($res)) {
    echo "Something already exist in database";
}