3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php function doFoo(){ echo 'hi!'; } $callable = 'doFoo'; var_dump( is_callable( $callable ) );
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
bool(true)