What are the potential pitfalls of saving HEX data as text in PHP?

Saving HEX data as text in PHP can lead to data corruption or loss of information, as PHP may interpret certain characters in the HEX data as special characters. To avoid this issue, it is recommended to encode the HEX data using base64 encoding before saving it as text.

// Encode HEX data using base64 encoding before saving as text
$hexData = "48656c6c6f20576f726c64"; // HEX data to be saved
$encodedData = base64_encode(hex2bin($hexData)); // Encode HEX data using base64 encoding

// Save encoded data as text
file_put_contents("saved_data.txt", $encodedData);