SQL数据和JavaScript-最佳实践

Question

Let's say a website needs to pull information from a specific table in a database based on a user's menu selection. That table's data is then fed into some JS equations and thrown onto the page.

What is the best way to go about pulling that table's information? I've read that trying to access an SQL database via JavaScript is bad practice, so is there another way to do this? I know about PHP's json_encode , but I guess I'm not entirely sure

1. What the syntax is if I'm calling PHP from a JS script, and
2. If that's 'best' practice. Still relatively new to this, so I'd like to do this right.

Another option as far as I'm concerned is attempting to pull ALL of the possible tables (not a security concern) at once on page load. I expect that'd introduce a good deal of latency, though.

Answer 1

It looks to me that you are not really sure what technique to use. Here are some options. I'm not going to type them here because, there is enough to find about each one:

plain php: w3schools

pure ajax call: stackoverflow

jquery: jquery

Ajax calls are more user friendly and many times more efficient because, you don't have to refresh the page. I usually get all information at once( as long your mysql data is not to big). As for security: You use php either way so it doesn't matter if you use Ajax or not. Oh and don't select valuable data of users data (like password or their emails). I hope you get more overview after this :)