Online PHP editor | output for jWSe1

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: Fatal error: Uncaught TypeError: date(): Argument #2 ($timestamp) must be of type ?int, string given in /in/jWSe1:2 Stack trace: #0 /in/jWSe1(2): date('j of F Y, \\a\\t ...', '1938-17-17') #1 {main} thrown in /in/jWSe1 on line 2
Process exited with code 255.
Output for 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33: Notice: A non well formed numeric value encountered in /in/jWSe1 on line 2 1 1970f January 1970, at 1.32 am, Thursday22 1971f January 1971, at 1.30 pm, Friday
Output for 7.3.32 - 7.3.33: 1 1970f January 1970, at 12.32 am, Thursday22 1971f January 1971, at 1.30 pm, Friday
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5: 1 of January 1970, at 1.32 am, Thursday22 of January 1971, at 1.30 pm, Friday