Introduction to the usage of the PHP at (@) symbol _php Tips

Here's how to use it.

For example:

Copy Code code as follows:

function Db_connect ()//Connection database
{
@ $db =mysql_connect (' localhost ', ' root ', ' test ');
if (! $db)
throw new Exception (' failed to connect to database! Please try again! ');
mysql_select_db (' book ');
return $db;
}

If the connection to the database is unsuccessful, the front of the "@" can be displayed to suppress the error, that is, will not display errors, and then throw an exception, show their definition of exception handling, add this is only to allow viewers do not see, unfriendly page, can not suppress the error, can only suppress the display error! @ Use where you think you might be wrong in the future, @ after a space! It's best to use less, as if you're adding system overhead.