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run code in 200+ php & hhvm versions
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<?php //$var1 = "1"; $var2 = "2"; function foo() { global $var1, $var2; var_dump($var1 ?? $var2); } foo();
based on t69Tr
Output for 7.0.0 - 7.2.0
string(1) "2"
Output for 5.3.19 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/DncjP on line 8
Process exited with code 255.