Home Backend Development PHP Tutorial ord()的有关问题

ord()的有关问题

Jun 13, 2016 am 10:02 AM
ascii ord quot str

ord()的问题
手册上面说是转换成ASCII,可是ASCII只有127个字符。为什么ord("我")依然可以输出结果呢。

------解决方案--------------------
who tell U ASCII只有127个?

加上扩展的应该有256个吧。

ord()是把字符串的第一个字符转为ASCII码。中文是双字节编码。
所以ord("我")只是“我”的第一个字符的ASCII码
------解决方案--------------------
$str = '我';
$o1 = ord($str);
$o2 = ord($str[0]);
//output $o1=230 $o2=230
手册上写的很清楚
返回字符串 string 第一个字符的 ASCII 码值。 

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