PHP和MySql - 比较日期[重复]

This question already has an answer here:

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Good Day World,

Need help regarding mySql & php. Let say I have a table on my db for date. How do I want to compare the date on the table and the date given by user from a form?

For example, date_on_db < date_post. Then, insert to db. Do I have to use array?

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