utf-8 - UTF-8 value of a character in ColdFusion?

Question

In ColdFusion I can determine the ASCII value of character by using asc()

How do I determine the UTF-8 value of a character?

Answer 1

<cfscript>

    x = "漢"; // 3 bytes

    // bytes of unicode character, a.k.a. String.getBytes("UTF-8")
    bytes = charsetDecode(x, "UTF-8");
    writeDump(bytes); // -26-68-94

    // convert the 3 bytes to Hex
    hex = binaryEncode(bytes, "HEX");
    writeDump(hex); // E6BCA2

    // convert the Hex to Dec
    dec = inputBaseN(hex, 16);
    writeDump(dec); // 15121570

    // asc() uses the UCS-2 representation: 漢 = Hex 6F22 = Dec 28450
    asc = asc(x);
    writeDump(asc); // 28450

</cfscript>

USC-2 固定为 2 个字节，因此它不能支持所有 unicode 字符（因为每个字符最多可以有 4 个字节）。但是你到底想在这里实现什么？

注意：如果您运行此示例并返回超过 3 个字节，请确保 CF 将文件选择为 UTF-8（带有 BOM）。