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$this can not be used in static methods. #26279

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OliverLeitner opened this issue Feb 23, 2018 · 2 comments
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$this can not be used in static methods. #26279

OliverLeitner opened this issue Feb 23, 2018 · 2 comments
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@OliverLeitner
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Q A
Bug report? yes
Feature request? no
BC Break report? no
RFC? yes
Symfony version current master

file: symfony/console/Tests/Command.php

    private static function createClosure()
    {
        return function (InputInterface $input, OutputInterface $output) {
            $output->writeln(isset($this) ? 'bound' : 'not bound');
        };
    }

Causes linter error in visual studio code:

file: 'file:///.../symfony/console/Tests/Command/CommandTest.php'
severity: 'Error'
message: '$this can not be used in static methods.'
at: '401,36'
source: 'php'
code: 'undefined'

and yes... one could disable the linter...

anyways... i am sure youre already aware of this and a good solid fix is already on the way, just wanted to check in and say hi;-)
@prisis
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prisis commented Feb 23, 2018

Hey :), you need to use self:: instead of $this-> for static methods.

For more infos http://www.brainbell.com/tutorials/php/Static_Methods.html

@xabbuh xabbuh added the Console label Feb 23, 2018
@xabbuh
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xabbuh commented Feb 23, 2018

$this is not used by the static method, but it is part of the closure for which Closure::bind() makes sure that the context is set (see #20847).

@xabbuh xabbuh closed this as completed Feb 23, 2018
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@xabbuh @prisis @OliverLeitner