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<?php class Check { private static $instance; public function getInstance($name) { if (isset(self::$instance)) { return self::$instance; } self::$instance = $name; return self::$instance; } } $a = new Check; var_dump($a->getInstance('a')); $b = new Check; var_dump($b->getInstance('b')); var_dump($a->getInstance());
Output for git.master, git.master_jit, rfc.property-hooks
string(1) "a" string(1) "a" Fatal error: Uncaught ArgumentCountError: Too few arguments to function Check::getInstance(), 0 passed in /in/6Pjsv on line 26 and exactly 1 expected in /in/6Pjsv:7 Stack trace: #0 /in/6Pjsv(26): Check->getInstance() #1 {main} thrown in /in/6Pjsv on line 7
Process exited with code 255.

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