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run code in 150+ php & hhvm versions
Bugs & Features
<?php $o = new stdClass; var_dump(empty($o)); var_dump(empty((array) $o));
based on tg49n
Output for 5.5.24 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
bool(false) bool(true)
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.4.45
Parse error: syntax error, unexpected '(array)' (array) (T_ARRAY_CAST) in /in/asqrX on line 6
Process exited with code 255.
Output for 5.3.0 - 5.3.29
Parse error: syntax error, unexpected T_ARRAY_CAST in /in/asqrX on line 6
Process exited with code 255.
Output for 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_ARRAY_CAST, expecting T_STRING or T_VARIABLE or '$' in /in/asqrX on line 6
Process exited with code 255.
Output for 5.0.0 - 5.0.5
Parse error: parse error, unexpected T_ARRAY_CAST, expecting T_STRING or T_VARIABLE or '$' in /in/asqrX on line 6
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_ARRAY_CAST, expecting T_VARIABLE or '$' in /in/asqrX on line 6
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1
Parse error: parse error, unexpected T_ARRAY_CAST, expecting T_VARIABLE or '$' in /in/asqrX on line 6
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/asqrX on line 6
Process exited with code 255.