How can the problem of special characters like "+" not being passed correctly be resolved in PHP?

Special characters like "+" not being passed correctly in PHP can be resolved by using the urlencode() function to encode the special characters before passing them in the URL. This function will convert the special characters into a format that can be safely passed in a URL.

$special_character = "+";
$encoded_character = urlencode($special_character);
echo $encoded_character;