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@ 2020-02-11T05:03:16Z

<?php

class Foo {
    public $fn = 'key';
    
    public function bar() {
        return [
            $this->fn => 'value',
        ];
    }
}

$foo = new Foo();
$array = $foo->bar();
var_dump($array);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive previewkey bindings

27.69 ms | 404 KiB | 5 Q