ord()不适用于utf-8 [英] ord() doesn't work with utf-8

问题描述

根据ISO 8859-1

according to ISO 8859-1

€符号的十进制值为128

€ Symbol has decimal value 128

我的默认php脚本编码为

My default php script encoding is

echo mb_internal_encoding(); //ISO-8859-1

所以现在是PHP

echo chr(128);  //Output exactly what i want '€'

但是

echo ord('€');  //opposite it returns 226, it should be 128

为什么会这样?

推荐答案

根据维基百科和文件格式，

• ISO-8859-1根本没有欧元符号
• ISO-8859-15的代码点为164(0xA4)
• Windows-1252在代码点128(0x80)上具有它
• Unicode在代码点8364(0x20AC)上具有欧元符号
• UTF-8将其编码为0xE2 0x82 0xAC.第一个字节E2是十进制的226.

• ISO-8859-1 doesn't have the Euro symbol at all
• ISO-8859-15 has it at codepoint 164 (0xA4)
• Windows-1252 has it at codepoint 128 (0x80)
• Unicode has the Euro symbol at codepoint 8364 (0x20AC)
• UTF-8 encodes that as 0xE2 0x82 0xAC. The first byte E2 is 226 in decimal.

所以看来您的源文件是用UTF-8编码的(而ord()仅返回第一个字节)，而您的输出是在Windows-1252中.

So it seems your source file is encoded in UTF-8 (and ord() only returns the first byte), whereas your output is in Windows-1252.

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