What is the function in PHP used to convert a string into a string for a GET request?

To convert a string into a format suitable for a GET request in PHP, you can use the urlencode() function. This function will encode special characters in the string so that it can be safely included in a URL. Simply pass the string you want to convert as an argument to the urlencode() function and assign the result to a variable to use in your GET request.

$string = "Hello, world!";
$encodedString = urlencode($string);
echo $encodedString; // Output: Hello%2C+world%21