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run code in 200+ php & hhvm versions
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<?php $teste = 'oi'; echo $teste ?? 'olá';
based on J9TkZ
Output for 7.0.0 - 7.2.0
oi
Output for 5.3.21 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/kDhU6 on line 5
Process exited with code 255.