该函数首先解析选项的第二个词(第一个词是名字)，将它变为大写形式，然后比较两个字符串，并返回- 1、1或0。

This function first parses the second word from the option (the first word being the first name), changes it to upper case, and then compares the two strings and returns a -1, 1, or 0.

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比如，compare方法比较两个字符串；sort和asort方法以与相应的php数组函数相同的方式对数组或关联数组进行排序。

For example, the compare method compares two strings; the sort and asort methods sort arrays or associative arrays in a way similar to the corresponding PHP array functions.

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stringcomparator类：使用特定于地区的规则比较两个字符串。

Class StringComparator: Compares two strings using locale-specific rules.

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