Online PHP editor | output for MZ18L

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Warning: Class "1" not found in /in/MZ18L on line 3 Warning: Class "55" not found in /in/MZ18L on line 3 Warning: Class "1" not found in /in/MZ18L on line 3 Warning: Class "1" not found in /in/MZ18L on line 3
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.8 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33: Warning: Class '1' not found in /in/MZ18L on line 3 Warning: Class '55' not found in /in/MZ18L on line 3 Warning: Class '1' not found in /in/MZ18L on line 3 Warning: Class '1' not found in /in/MZ18L on line 3
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17: Warning: array_walk(): Unable to call class_alias() - function does not exist in /in/MZ18L on line 3
Output for 4.3.0 - 4.3.1: Warning: array_walk() [http://www.php.net/function.array-walk]: Unable to call class_alias() - function does not exist in /in/MZ18L on line 3