Source

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Quick Reference

PHP

• echo - this prints out data following the echo command to the browser.
• $_POST - The post tag holds all the form fields and their data that have been submitted by a form that uses the POST method.

MySQL

uppercase characters are MySQL commands, lowercase characters are custom data.

• INSERT INTO - tells MySQL that it is going to INSERT data into the database, following to INSERT INTO is the table name you are inserting data into.
• Brackets "(xxx)" - Brackets contain multiple data, as you are not just adding one field. In the example the first set of data inside brackets are the fields you are inserting data into
• VALUES - tells MySQL it is going to insert the values into the defined table and fields, the following set of data inside the brackets is the data you are inserting.