Online PHP editor | output for 0W4OU

Output for 7.3.33, 7.4.28 - 7.4.33, 8.0.13 - 8.0.30, 8.1.0 - 8.1.15, 8.1.17 - 8.1.19, 8.1.21 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6: array(3) { [0]=> string(1) "." [1]=> string(2) ".." [2]=> string(5) "0W4OU" }
Output for 8.3.5: array(4) { [0]=> string(1) "." [1]=> string(2) ".." [2]=> string(5) "0W4OU" [3]=> string(5) "iVhLK" }
Output for 8.1.20: array(4) { [0]=> string(1) "." [1]=> string(2) ".." [2]=> string(5) "0W4OU" [3]=> string(5) "koWmU" }
Output for 8.1.16: array(4) { [0]=> string(1) "." [1]=> string(2) ".." [2]=> string(5) "0W4OU" [3]=> string(5) "SW77B" }
Output for 8.0.0 - 8.0.12: Warning: scandir(/in): Failed to open directory: Permission denied in /in/0W4OU on line 1 Warning: scandir(): (errno 13): Permission denied in /in/0W4OU on line 1 bool(false)
Output for 7.4.27: array(4) { [0]=> string(1) "." [1]=> string(2) ".." [2]=> string(5) "0W4OU" [3]=> string(5) "acf3O" }
Output for 7.4.26: array(4) { [0]=> string(1) "." [1]=> string(2) ".." [2]=> string(5) "0W4OU" [3]=> string(5) "onf4k" }
Output for 5.2.3 - 5.2.17, 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 - 7.2.34, 7.3.0 - 7.3.32, 7.4.0 - 7.4.25: Warning: scandir(/in): failed to open dir: Permission denied in /in/0W4OU on line 1 Warning: scandir(): (errno 13): Permission denied in /in/0W4OU on line 1 bool(false)
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.2: Warning: scandir(/in) [<a href='function.scandir'>function.scandir</a>]: failed to open dir: Permission denied in /in/0W4OU on line 1 Warning: scandir() [<a href='function.scandir'>function.scandir</a>]: (errno 13): Permission denied in /in/0W4OU on line 1 bool(false)
Output for 4.4.5 - 4.4.9: Fatal error: Call to undefined function: scandir() in /in/0W4OU on line 1 
Process exited with code 255.
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.4: Fatal error: Call to undefined function: scandir() in /in/0W4OU on line 1 
Process exited with code 255.
Output for 4.3.0 - 4.3.1: Fatal error: Call to undefined function: scandir() in /in/0W4OU on line 1