问题描述
我想比较两个变量，看看它们是否相同，但我希望这个比较不区分大小写。
I would like to compare two variables to see if they are the same, but I want this comparison to be case-insensitive.
例如，这将是区分大小写：
For example, this would be case sensitive:
if($var1 == $var2){
...
}
但我希望这个不区分大小写，我该如何处理？
But I want this to be case insensitive, how would I approach this?
推荐答案
这很简单;你只需要打电话给两个变量。
This is fairly simple; you just need to call strtolower() on both variables.
如果您需要处理Unicode或国际字符集，可以使用。
If you need to deal with Unicode or international character sets, you can use mb_strtolower().
请注意其他答案建议使用—该功能不处理多字节字符，因此任何UTF-8字符串的结果都是假的。
Please note that other answers suggest using strcasecmp()—that function does not handle multibyte characters, so results for any UTF-8 string will be bogus.
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