<?ph<?php<?hp?<?PHP
Fatal error: Uncaught Error: Call to undefined function echhohoo() in /in/O7Gq5:1
Stack trace:
#0 {main}
thrown in /in/O7Gq5 on line 1
Process exited with code 255.
Output for 8.0.13
Parse error: syntax error, unexpected token "?" in /in/O7Gq5 on line 1
Process exited with code 255.
Output for 5.4.0 - 5.4.16, 7.3.32 - 7.3.33, 7.4.26, 7.4.33
Parse error: syntax error, unexpected '?' in /in/O7Gq5 on line 1
Process exited with code 255.