Write the config file how to conditionally query in PHP file

How to write a config file in PHP file based on conditional query
Write the config file how to query the PHP file conditionally, that is, add the goods to the shopping cart inside, I am a beginner, I hope you can write the details of the great God

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References:

Quote: References:

Are you talking about the SQL statement?

SELECT * Frome Table WHERE ...

No, just how to get him to me. Add to cart, the product information is displayed in the Shopping cart list

Generally, this is cookie/session operation, saved in Cookie/session

Example: http://www.jb51.net/article/7053.htm

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