Online PHP editor | output for cR6Gg

Output for 7.2.0: int(77) int(86)
Output for 7.1.7: int(54) int(88)
Output for 7.1.6: int(78) int(3)
Output for 7.1.5: int(27) int(38)
Output for 7.1.0: int(13) int(34)
Output for 7.0.20: int(60) int(3)
Output for 7.0.6: int(18) int(55)
Output for 7.0.5: int(80) int(47)
Output for 7.0.4: int(31) int(37)
Output for 7.0.3: int(95) int(54)
Output for 7.0.2: int(61) int(73)
Output for 7.0.1: int(83) int(46)
Output for 7.0.0: int(17) int(86)
Output for 5.6.8 - 5.6.28: Parse error: syntax error, unexpected ':', expecting '{' in /in/cR6Gg on line 8
Process exited with code 255.
Output for 5.5.24 - 5.5.35: Parse error: syntax error, unexpected 'function' (T_FUNCTION), expecting identifier (T_STRING) or \\ (T_NS_SEPARATOR) in /in/cR6Gg on line 3
Process exited with code 255.