What do you need to know before learning PHP?

Because PHP is currently mainly used for network applications, that is, websites, etc. So it's best to know some HTML, CSS, and JavaScript; then you need to know MySQL (that is, SQL statements); and finally start learning PHP.

html, css, and javascript are mainly used to make the front-end page. They are the face of the web page you make and the part closest to the user, so they are necessary It is still necessary to have some understanding. And for small companies, everything from page design, page layout, art, and back-end processing are all completed by one or several people, without a clear division of labor; so it must be both front-end and back-end. In large companies, although there is a clear division of labor, although you are not required to write these things at the front desk, you must be able to read them.

What mysql needs to master is SQL statements, which are nothing more than adding, deleting, checking, and database optimization. These are relatively simple and fast to learn, and they are also knowledge that must be mastered.

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