相关疑难解决方法(0)

如何比较版本格式的两个字符串？这样:

version_compare("2.5.1",  "2.5.2") => -1 (smaller)
version_compare("2.5.2",  "2.5.2") =>  0 (equal)
version_compare("2.5.5",  "2.5.2") =>  1 (bigger)
version_compare("2.5.11", "2.5.2") =>  1 (bigger, eleven is bigger than two)