3v4l.org

run code in 300+ PHP versions simultaneously
<?php namespace One { function strlen($s) { return '-NS-'; } var_dump(\strlen('HELLO')); var_dump(strlen('HELLO')); var_dump(namespace\strlen('HELLO')); echo "\n"; } namespace Two { var_dump(\strlen('HELLO')); var_dump(strlen('HELLO')); var_dump(namespace\strlen('HELLO')); }
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
int(5) string(4) "-NS-" string(4) "-NS-" int(5) int(5) Fatal error: Uncaught Error: Call to undefined function Two\strlen() in /in/0j5Ht:17 Stack trace: #0 {main} thrown in /in/0j5Ht on line 17
Process exited with code 255.
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
int(5) string(4) "-NS-" string(4) "-NS-" int(5) int(5) Fatal error: Call to undefined function Two\strlen() in /in/0j5Ht on line 17
Process exited with code 255.
preferences:
264.4 ms | 402 KiB | 376 Q