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<?php $_SESSION['var'] = 1; function func1() { global $ref; global $nonRef; $ref = &$_SESSION['var']; $nonRef = $_SESSION['var']; } func1(); var_dump($_SESSION['var']); var_dump($ref); var_dump($nonRef);
Output for git.master, git.master_jit, rfc.property-hooks
int(1) NULL int(1)

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