3v4l.org

run code in 300+ PHP versions simultaneously
<?php $dir = new RecursiveDirectoryIterator(__DIR__); $it = new RecursiveCallbackFilterIterator($dir, function(){return true;}); var_dump($it);
Output for 7.2.29 - 7.2.33, 7.3.16 - 7.3.29, 7.3.33, 7.4.3 - 7.4.16, 7.4.21 - 7.4.22, 7.4.26 - 7.4.33, 8.0.0, 8.0.2 - 8.0.3, 8.0.7 - 8.0.9, 8.0.13 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
object(RecursiveCallbackFilterIterator)#2 (0) { }
Output for 8.0.1, 8.0.5 - 8.0.6, 8.0.10 - 8.0.12
Fatal error: Uncaught UnexpectedValueException: RecursiveDirectoryIterator::__construct(/in): Failed to open directory: Permission denied in /in/2rBec:3 Stack trace: #0 /in/2rBec(3): RecursiveDirectoryIterator->__construct('/in') #1 {main} thrown in /in/2rBec on line 3
Process exited with code 255.
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.26, 7.3.0 - 7.3.13, 7.3.30 - 7.3.32, 7.4.0 - 7.4.1, 7.4.20, 7.4.23 - 7.4.25
Fatal error: Uncaught UnexpectedValueException: RecursiveDirectoryIterator::__construct(/in): failed to open dir: Permission denied in /in/2rBec:3 Stack trace: #0 /in/2rBec(3): RecursiveDirectoryIterator->__construct('/in') #1 {main} thrown in /in/2rBec on line 3
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
Fatal error: Uncaught exception 'UnexpectedValueException' with message 'RecursiveDirectoryIterator::__construct(/in): failed to open dir: Permission denied' in /in/2rBec:3 Stack trace: #0 /in/2rBec(3): RecursiveDirectoryIterator->__construct('/in') #1 {main} thrown in /in/2rBec on line 3
Process exited with code 255.
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
Parse error: syntax error, unexpected T_FUNCTION in /in/2rBec on line 5
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 T_FUNCTION in /in/2rBec on line 5
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error in /in/2rBec on line 5
Process exited with code 255.

preferences:
325.01 ms | 401 KiB | 458 Q