3v4l.org

run code in 300+ PHP versions simultaneously
<?php var_dump(strlen($x=serialize($GLOBALS)), $x['_REQUEST']);
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Fatal error: Uncaught TypeError: Cannot access offset of type string on string in /in/qNVcZ:3 Stack trace: #0 {main} thrown in /in/qNVcZ on line 3
Process exited with code 255.
Output for 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
Warning: Illegal string offset '_REQUEST' in /in/qNVcZ on line 3 int(678) string(1) "a"
Output for 7.0.0 - 7.0.33
Warning: Illegal string offset '_REQUEST' in /in/qNVcZ on line 3 int(681) string(1) "a"
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40
Warning: Illegal string offset '_REQUEST' in /in/qNVcZ on line 3 int(2039) string(1) "a"
Output for 5.3.0 - 5.3.29
int(5174) string(1) "a"
Output for 5.2.3 - 5.2.17
int(5474) string(1) "a"
Output for 5.2.1 - 5.2.2
int(4574) string(1) "a"
Output for 5.1.0 - 5.1.6, 5.2.0
int(3050) string(1) "a"
Output for 5.0.0 - 5.0.5
int(2918) string(1) "a"
Output for 4.3.2 - 4.3.11, 4.4.0 - 4.4.9
int(3570) string(1) "a"
Output for 4.3.0 - 4.3.1
int(3604) string(1) "a"

preferences:
270.93 ms | 401 KiB | 460 Q