3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php var_dump(json_encode("//"), JSON_UNESCAPED_SLASHES);
based on O2N1A
Output for 5.4.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
string(6) ""\/\/"" int(64)
Output for 5.2.0 - 5.3.29
Notice: Use of undefined constant JSON_UNESCAPED_SLASHES - assumed 'JSON_UNESCAPED_SLASHES' in /in/mv0DE on line 2 string(6) ""\/\/"" string(22) "JSON_UNESCAPED_SLASHES"
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/mv0DE on line 2
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/mv0DE on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/mv0DE on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/mv0DE on line 2