Online PHP editor | output for pQh1T

Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7: Fatal error: Uncaught TypeError: prev(): Argument #1 ($array) must be of type array, string given in /in/pQh1T:4 Stack trace: #0 /in/pQh1T(4): prev('foot') #1 {main} thrown in /in/pQh1T on line 4
Process exited with code 255.
Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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: prev() expects parameter 1 to be array, string given in /in/pQh1T on line 4 NULL Warning: prev() expects parameter 1 to be array, string given in /in/pQh1T on line 4 NULL Warning: prev() expects parameter 1 to be array, string given in /in/pQh1T on line 4 NULL Warning: prev() expects parameter 1 to be array, string given in /in/pQh1T on line 4 NULL
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: prev(): Passed variable is not an array or object in /in/pQh1T on line 4 bool(false) Warning: prev(): Passed variable is not an array or object in /in/pQh1T on line 4 bool(false) Warning: prev(): Passed variable is not an array or object in /in/pQh1T on line 4 bool(false) Warning: prev(): Passed variable is not an array or object in /in/pQh1T on line 4 bool(false)
Output for 4.3.0 - 4.3.1: Warning: prev() [http://www.php.net/function.prev]: Passed variable is not an array or object in /in/pQh1T on line 4 bool(false) Warning: prev() [http://www.php.net/function.prev]: Passed variable is not an array or object in /in/pQh1T on line 4 bool(false) Warning: prev() [http://www.php.net/function.prev]: Passed variable is not an array or object in /in/pQh1T on line 4 bool(false) Warning: prev() [http://www.php.net/function.prev]: Passed variable is not an array or object in /in/pQh1T on line 4 bool(false)