3v4l.org

run code in 300+ PHP versions simultaneously
<?php $r = new \ReflectionFunction('copy'); foreach($r->getParameters() as $p) { var_dump($p->isOptional()); }
Output for 5.3.4 - 5.3.29, 5.4.25 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 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 - 8.3.7
bool(false) bool(false) bool(true)
Output for 5.4.0 - 5.4.24
bool(false) bool(false) bool(false)
Output for 5.3.0 - 5.3.3
bool(false) bool(false)
Output for 5.2.0 - 5.2.17
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/hbk1K on line 2 bool(false) bool(false)
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/hbk1K on line 2
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/hbk1K on line 2 Fatal error: Cannot instantiate non-existent class: reflectionfunction in /in/hbk1K on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Warning: Unexpected character in input: '\' (ASCII=92) state=1 in /in/hbk1K on line 2 Fatal error: Cannot instantiate non-existent class: reflectionfunction in /in/hbk1K on line 2

preferences:
239.15 ms | 402 KiB | 361 Q