I don't understand why backslash is used in extends class in php code

Question

class SwiftMailerTestCase extends \PHPUnit_Framework_TestCase

why coder uses backslash in extends class in above php code

This is a `namespace` http://php.net/manual/en/language.namespaces.php — Klemen Tusar, Apr 16 '17 at 11:54

Adarsh Sojitra · Accepted Answer · 2017-04-16T11:57:59.077

2

It is used to let PHP know where the class exists. For example, \app\classes\TestClass will let it know that the class exists in app\classes directory/namespace. If you will not add the path, It will look for the class in the same Namespace!

edited Apr 16 '17 at 11:57

answered Apr 16 '17 at 11:54

Adarsh Sojitra

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Yes! Exactly! I mean namespace! – Adarsh Sojitra Apr 16 '17 at 11:58
but why backslash used in the front of "PHPUnit_Framework_TestCase" look \PHPUnit_Framework_TestCase. this is the full code from swiftmailer is – zahid Apr 16 '17 at 12:18
to let it know that the class exist at root of the application! – Adarsh Sojitra Apr 16 '17 at 12:24
Thanks a lot Adarsh Sojitra – zahid Apr 24 '17 at 08:11

I don't understand why backslash is used in extends class in php code

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