3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo json_encode("\\viking\users\chsd");
Output for 5.2.0 - 7.2.0
"\\viking\\users\\chsd"
Output for 5.0.0 - 5.1.6
Fatal error: Call to undefined function json_encode() in /in/3FBNK on line 3
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: json_encode() in /in/3FBNK on line 3
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: json_encode() in /in/3FBNK on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: json_encode() in /in/3FBNK on line 3