How can one efficiently split and process hexadecimal values in PHP strings?

To efficiently split and process hexadecimal values in PHP strings, you can use the `str_split` function to split the hexadecimal string into an array of characters, then process each character individually using a loop. You can convert each hexadecimal character to its decimal equivalent using the `hexdec` function if needed.

$hexString = '1A2B3C';
$hexArray = str_split($hexString, 1);

foreach ($hexArray as $hexChar) {
    $decimalValue = hexdec($hexChar);
    // Process the decimal value as needed
}