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run code in 200+ php & hhvm versions
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<?php $var = $v ?? "test"; echo $var;
based on k2W5R
Output for 7.0.0 - 7.2.0
test
Output for 5.3.22 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/gJquf on line 2
Process exited with code 255.