如何将数据从mysql数据库发送到JS脚本？

Question

My intention is to query an MySQL database using a PHP script and then send the information to JavaScript.

I know how to encode the info into the JSON and send the request to the server script.

How does the PHP script know it has been queried it should answer?

Answer 1

Thank you for all the feedback provided!

Unfortunately, I was not sure, whether I had to use exit or header('Content-Type: application/json') as the answers suggested, I decided to use both.

In the end, I added both. This is what worked:

header('Content-Type: application/json');
echo json_encode($rows, JSON_NUMERIC_CHECK);
exit;