How do I edit this PHP if URL contains statement ?

Quote:

urlencode($your_string) — This PHP function is encodes a string to be used in a query part of a URL. URL encoding is used when placing text in a query string to avoid it being confused with the URL itself.

Quote:

urldecode($your_string) — This PHP function is decodes the query part of a URL string.

$url = "https://sample.ex/home.php?queryparam=all about php";
$encodedUrl = urlencode($url);

//returns http%3A%2F%2Fsample.ex%2Fhome.php%3Fqueryparam%3Dall+about+php
echo $encodedUrl;

//returns https://sample.ex/home.php?queryparam=all about php
echo urldecode($encodedUrl);