CODEWITHSUNDEEP
phpautoloadpsr-0
Ryan
Ryan

Reputation: 10101

Should I always use fully qualified class name in PHP?

I see some example code such as

$log = new Monolog\Logger('name');

Why not always use the fully qualified class name instead?

$log = new \Monolog\Logger('name');

So you don't need to worry if this file is being used in whatever namespace, right?

Upvotes: 3

Views: 980

Answers (1)

Brobin
Brobin

Reputation: 3326

You would use a fully qualified namespace if you are referencing a class from a separate namespace. For example:

<?php
namespace Foo\Bar;

class ClassName
{
    function __construct()
    {
        $this->foobar = new Monolog\Logger;
    }
}

In this situation, $this->foobar would be resolved to an instance of Foo\Bar\Monolog\Logger.

If Monolog is a completely different package from Foo\Bar, we don't want this to happen, so we use the fully qualififed namespace.

If you used the fully-qualified namespace of \Monolog\Logger, $this->foobar would be an instance of Monolog\Logger.

Use the fully-qualified namespaces if you are using classes from a separate package/namespace in a namespace of your own. Use just the qualified namespace if you are using classes within the same namespace.

Upvotes: 2

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