3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php echo is_number("8501/8548")? "true" : "false";
Output for 7.0.0 - 7.2.0
Fatal error: Uncaught Error: Call to undefined function is_number() in /in/ftUN6:3 Stack trace: #0 {main} thrown in /in/ftUN6 on line 3
Process exited with code 255.
Output for 5.3.18 - 5.6.28
Fatal error: Call to undefined function is_number() in /in/ftUN6 on line 3
Process exited with code 255.