3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $input = "the number of letters in mississippi = 11"; $i=0; $cp = $input; while( !(ctype_digit($cp[$i++]) ) ) ; echo substring($input,--$i,0),"\n";
Output for 7.0.0 - 7.1.0
Fatal error: Uncaught Error: Call to undefined function substring() in /in/EVSAF:8 Stack trace: #0 {main} thrown in /in/EVSAF on line 8
Process exited with code 255.
Output for 5.0.0 - 5.6.28
Fatal error: Call to undefined function substring() in /in/EVSAF on line 8
Process exited with code 255.
Output for 4.4.5 - 4.4.9
Fatal error: Call to undefined function: substring() in /in/EVSAF on line 8
Process exited with code 255.
Output for 4.3.2 - 4.4.4
Fatal error: Call to undefined function: substring() in /in/EVSAF on line 8
Process exited with code 255.
Output for 4.3.0 - 4.3.1
Fatal error: Call to undefined function: substring() in /in/EVSAF on line 8