Online PHP editor | output for PkHEN

Output for 8.0.10 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7: int(2) Warning: Undefined variable $idx in /in/PkHEN on line 3 Warning: Undefined array key "" in /in/PkHEN on line 3 Fatal error: Uncaught TypeError: count(): Argument #1 ($value) must be of type Countable|array, null given in /in/PkHEN:3 Stack trace: #0 /in/PkHEN(6): userland_func_num_args() #1 /in/PkHEN(9): bar('foo', 'bar') #2 {main} thrown in /in/PkHEN on line 3
Process exited with code 255.
Output for 8.0.0 - 8.0.9: int(2) Warning: Undefined variable $idx in /in/PkHEN on line 3 Warning: Undefined array key "" in /in/PkHEN on line 3 Fatal error: Uncaught TypeError: count(): Argument #1 ($var) must be of type Countable|array, null given in /in/PkHEN:3 Stack trace: #0 /in/PkHEN(6): userland_func_num_args() #1 /in/PkHEN(9): bar('foo', 'bar') #2 {main} thrown in /in/PkHEN on line 3
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33: int(2) Notice: Undefined variable: idx in /in/PkHEN on line 3 Notice: Undefined index: in /in/PkHEN on line 3 Warning: count(): Parameter must be an array or an object that implements Countable in /in/PkHEN on line 3 int(0)
Output for 7.3.32 - 7.3.33: int(2) Warning: count(): Parameter must be an array or an object that implements Countable in /in/PkHEN on line 3 int(0)
Output for 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.25: int(2) Notice: Undefined variable: idx in /in/PkHEN on line 3 Notice: Undefined index: in /in/PkHEN on line 3 int(0)
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29: Parse error: syntax error, unexpected '[' in /in/PkHEN on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5: Parse error: parse error, unexpected '[' in /in/PkHEN on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error in /in/PkHEN on line 3
Process exited with code 255.