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run code in 150+ php & hhvm versions
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<?php array_map( function ($token) { if (is_array($token)) { echo token_name($token[0]); } }, token_get_all('<?php $a = [1]') );
Output for 5.3.0 - 5.6.28, hhvm-3.12.0, 7.0.0 - 7.1.0
T_OPEN_TAGT_VARIABLET_WHITESPACET_WHITESPACET_LNUMBER
Output for hhvm-3.10.0

Process exited with code 153.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION, expecting ')' in /in/KAphv 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 T_FUNCTION, expecting ')' in /in/KAphv on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/KAphv on line 3
Process exited with code 255.