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@ 2015-09-17T16:53:35Z

<?php

class Config
{
    public function getConfig()
    {
        return $this->config ?? 'tst';
    }
}

var_dump((new Config())->getConfig());

Output
Performance
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var_dump: documentation ( source)

preferences:dark modelive preview

36.07 ms | 402 KiB | 5 Q