3v4l.org

run code in 300+ PHP versions simultaneously
<?php function test($blah1, &$blah2){ $blah1 = 42; $blah2 = 42; } test($undeclared1,$undeclared2);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $undeclared1 in /in/eVjNK on line 8

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