Online PHP editor | output for YFOmj

Output for 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6: Warning: Undefined variable $source_file in /in/YFOmj on line 3 Deprecated: file(): Passing null to parameter #1 ($filename) of type string is deprecated in /in/YFOmj on line 3 Fatal error: Uncaught ValueError: Path cannot be empty in /in/YFOmj:3 Stack trace: #0 /in/YFOmj(3): file('') #1 {main} thrown in /in/YFOmj on line 3
Process exited with code 255.
Output for 8.0.0 - 8.0.30: Warning: Undefined variable $source_file in /in/YFOmj on line 3 Fatal error: Uncaught ValueError: Path cannot be empty in /in/YFOmj:3 Stack trace: #0 /in/YFOmj(3): file('') #1 {main} thrown in /in/YFOmj on line 3
Process exited with code 255.
Output for 5.5.0 - 5.5.35, 5.6.0 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.12 - 7.3.31, 7.4.0 - 7.4.25, 7.4.27 - 7.4.33: Notice: Undefined variable: source_file in /in/YFOmj on line 3 Warning: file(): Filename cannot be empty in /in/YFOmj on line 3 Warning: join(): Invalid arguments passed in /in/YFOmj on line 3
Output for 5.2.9 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 7.3.32 - 7.3.33, 7.4.26: Warning: file(): Filename cannot be empty in /in/YFOmj on line 3 Warning: join(): Invalid arguments passed in /in/YFOmj on line 3
Output for 5.2.5 - 5.2.8: Warning: join(): Invalid arguments passed in /in/YFOmj on line 3
Output for 5.2.3 - 5.2.4: Warning: join(): Bad arguments. in /in/YFOmj on line 3
Output for 4.4.3 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2: Warning: join() [<a href='function.join'>function.join</a>]: Bad arguments. in /in/YFOmj on line 3
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.2: Warning: join(): Bad arguments. in /in/YFOmj on line 3
Output for 4.3.0 - 4.3.1: Warning: join() [<a href='http://www.php.net/function.join'>function.join</a>]: Bad arguments. in /in/YFOmj on line 3