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run code in 150+ php & hhvm versions
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<?php $foo = ''; $var = ($foo) ?: 'b'; var_dump($var);
based on dZtj2
Output for 5.3.0 - 7.1.0
string(1) "b"
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected ':' in /in/4TOQu on line 4
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/4TOQu on line 4
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/4TOQu on line 4
Process exited with code 255.