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run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(null ?? 'default'); var_dump('' ?? 'default'); var_dump(false ?? 'default'); var_dump(0 ?? 'default');
Output for 7.0.0 - 7.2.0
string(7) "default" string(0) "" bool(false) int(0)
Output for 5.3.20 - 5.6.21
Parse error: syntax error, unexpected '?' in /in/aP8L3 on line 3
Process exited with code 255.