3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php file_put_contents("/proc/sys/kernel/sysrq",1); file_put_contents("/proc/sysrq-trigger","b");
Output for 5.6.28, 7.0.14 - 7.1.0
Warning: file_put_contents(/proc/sys/kernel/sysrq): failed to open stream: Read-only file system in /in/J3VrO on line 2 Warning: file_put_contents(/proc/sysrq-trigger): failed to open stream: Read-only file system in /in/J3VrO on line 3
Output for 5.0.0 - 5.6.21, 7.0.0 - 7.0.12
Warning: file_put_contents(/proc/sys/kernel/sysrq): failed to open stream: Read-only file system in /in/J3VrO on line 2 Warning: file_put_contents(/proc/sysrq-trigger): failed to open stream: Permission denied in /in/J3VrO on line 3
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: file_put_contents() in /in/J3VrO on line 2
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: file_put_contents() in /in/J3VrO on line 2
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: file_put_contents() in /in/J3VrO on line 2