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run code in 200+ php & hhvm versions
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<?php $one = ['foo']; $two = ['bar']; if(($foo=array_pop($one) and false) or ($bar=array_pop($two) and false) or true) { var_dump($foo, $bar);//"foo" & null }

Abusive script

This script was stopped while abusing our resources

Output for 5.4.0 - 5.6.30, hhvm-3.13.2, hhvm-3.17.3, 7.0.0 - 7.1.7
string(3) "foo" string(3) "bar"
Output for hhvm-3.10.1 - 3.12.14, hhvm-3.15.4

Process exited with code 137.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[' in /in/jGt7o on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[' in /in/jGt7o on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/jGt7o on line 3
Process exited with code 255.