How can one ensure that all parameters are properly encoded and decoded in PHP to prevent errors?

When working with parameters in PHP, it is important to properly encode and decode them to prevent errors, especially when dealing with user input or data from external sources. To ensure all parameters are encoded and decoded correctly, you can use functions like urlencode() and urldecode() to handle URL encoding, or htmlentities() and html_entity_decode() for HTML encoding. By consistently applying these encoding and decoding functions to your parameters, you can prevent issues such as injection attacks or data corruption.

// Encoding parameters before sending them
$encoded_param = urlencode($param);

// Decoding parameters when receiving them
$decoded_param = urldecode($encoded_param);