3v4l.org

run code in 300+ PHP versions simultaneously
<?php $json = '{"\u0000": true}'; var_dump(json_decode($json), json_last_error_msg());
Output for 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 - 8.2.19, 8.3.0 - 8.3.7
NULL string(36) "The decoded property name is invalid"
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.28
Fatal error: Cannot access property started with '\0' in /in/PhPDl on line 5
Process exited with code 255.
preferences:
129.5 ms | 402 KiB | 257 Q