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run code in 200+ php & hhvm versions
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<?php $a = [2]; $b = [2]; var_dump($a == $b);
Output for 5.4.9 - 7.2.0
bool(true)
Output for 5.3.19 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/M5dp9 on line 3
Process exited with code 255.