Online PHP editor | output for rKFTN

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: Array to string conversion in /in/rKFTN on line 3 Fatal error: Uncaught TypeError: implode(): Argument #2 ($array) must be of type ?array, string given in /in/rKFTN:3 Stack trace: #0 /in/rKFTN(3): implode(', ', 'ThursdayArray') #1 {main} thrown in /in/rKFTN on line 3
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.37, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.7, 7.2.29 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.33: Notice: Array to string conversion in /in/rKFTN on line 3 Warning: implode(): Invalid arguments passed in /in/rKFTN on line 3
Output for 5.2.5 - 5.2.17, 5.3.0 - 5.3.29, 7.3.32 - 7.3.33: Warning: implode(): Invalid arguments passed in /in/rKFTN 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 - 5.2.4: Warning: implode(): Bad arguments. in /in/rKFTN on line 3
Output for 4.3.0 - 4.3.1: Warning: implode() [http://www.php.net/function.implode]: Bad arguments. in /in/rKFTN on line 3