我有以下字母数组
$_CharCodes = array(
"A" => 01, "B" => 02, "C" => 03, "D" => 04, "E" => 05, "F" => 06,
"G" => 07, "H" => 08, "I" => 09, "J" => 10, "K" => 11, "L" => 12,
"M" => 13, "N" => 14, "O" => 15, "P" => 16, "Q" => 17, "R" => 18,
"S" => 19, "T" => 20, "U" => 21, "V" => 22, "W" => 23, "X" => 24,
"Y" => 25, "Z" …