有没有什么方法可以传入一个日期，返回该日期是当月第几天？
如题，我貌似没有找到，就是一个类似jddayofweek的方法
------解决方案--------------------
当月第几天？
date('d',strtotime($str));
------解决方案--------------------
指定日期，返回这个日期当月是第几天，那你直接获取天数不就可以的，比如：2013-1-5 不就是一月份的第5天吗？
------解决方案--------------------
date('d',strtotime(日期))
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