FILTER_SANITIZE_URL constant in PHP

The FILTER_SANITIZE_URL constant removes all illegal URL characters from a string. It allows the following −

$-_.+!*'(),{}|\\^~[]`"><#%;/?:@&=

Return

The FILTER_SANITIZE_URL constant does not return anything.

Example

<?php
   $var = "www.example";
   var_dump(filter_var($var, FILTER_SANITIZE_URL));
?>

Output

The following is the output.

string(11) "www.example"