What is the recommended practice for passing variables through PHP links to ensure successful data transmission?

When passing variables through PHP links, it is recommended to use URL encoding to ensure successful data transmission. This helps to prevent issues with special characters or spaces in the data being passed. You can achieve this by using the urlencode() function in PHP to encode the variables before appending them to the URL.

$variable1 = "Hello World";
$variable2 = 12345;

$url = "example.php?var1=" . urlencode($variable1) . "&var2=" . urlencode($variable2);

echo '<a href="' . $url . '">Click here</a>';