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run code in 150+ php & hhvm versions
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<?php preg_match('#^([><=\\s]*)(.*)$#', '>=8', $matches) var_dump($matches);
Output for hhvm-3.10.0

Process exited with code 153.
Output for 5.4.0 - 5.4.18
Parse error: syntax error, unexpected 'var_dump' (T_STRING) in /in/eAIeW on line 3
Process exited with code 255.
Output for 5.3.0 - 5.3.27
Parse error: syntax error, unexpected T_STRING in /in/eAIeW on line 3
Process exited with code 255.