3v4l.org

run code in 150+ php & hhvm versions
Bugs & Features
<?php $query = $_GET['q']; $category = $_GET['catid']; if(check_string($query)) { $query = filter_string($query); } else { echo "Error: Variable is not a string."; die; } function check_string($str) { return preg_match("/^\w+$/", (string)$str); } function filter_string($str) { return preg_replace('/^(.*)$/ie', "filter_function(\"\\1\")", $str); } function filter_function($str) { // do encoding / filtering etc. here return $str; } ?>
based on EEoJZ
Output for 5.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
Notice: Undefined index: q in /in/OclsK on line 2 Notice: Undefined index: catid in /in/OclsK on line 3 Error: Variable is not a string.
Output for 4.3.0 - 5.2.17
Notice: Undefined index: q in /in/OclsK on line 2 Notice: Undefined index: catid in /in/OclsK on line 3 Error: Variable is not a string.