PHP Filters & Filter Functions Sanitize URLs
Example
Sanitze URLs
Remove all characters except letters, digits and $-_.+!*'(),{}|\^~[]`<>#%";/?:@&=
var_dump(filter_var('http://www.example.com/path/to/dir/index.php?test=y', FILTER_SANITIZE_URL));
var_dump(filter_var("http://www.example.com/path/to/dir/index.php?test=y!#$%&'*+-=?^_`{|}~.[]", FILTER_SANITIZE_URL));
var_dump(filter_var('http://www.example.com/path/to/dir/index.php?test=a b c', FILTER_SANITIZE_URL));
Results:
string(51) "http://www.example.com/path/to/dir/index.php?test=y"
string(72) "http://www.example.com/path/to/dir/index.php?test=y!#$%&'*+-=?^_`{|}~.[]"
string(53) "http://www.example.com/path/to/dir/index.php?test=abc"
