using or in php

[sandeep.nami]

hi guys

i have seen this new line of code and surprised!

mysql_connect('localhost','root','') or testFun();

i know that this is used in db connections

i want to know all the applications of 'or'
guys plz help me

[pritaeas]

It can be used in any boolean expression.

http://nl2.php.net/manual/en/language.operators.logical.php

[samarudge]

Well in that expression it meens if it fails to connect to the database (IE the function returns a FALSE value) it will run testFun(); Probably the most common use in that format is

mysql_connect('localhost', 'root', 'password') or die(mysql_error());

which trys to connect to mysql and if it fails it returns the error text and exits the script