3v4l.org

run code in 200+ php & hhvm versions
Bugs & Features
<?php $input = "the number of letters in mississippi = 11"; $i=0; $cp = $input; while( !(ctype_digit($cp[$i++]) ) ) ; echo $cp[--$i],$cp[$i],"\n";
Output for 4.3.0 - 7.2.0
11