How does an onclick funktion work, how do I get php informations to javascript, how do I get javascript informations to php and how do I use ajax js?

Question

I try to use an onclick function. If the user clicks the html button a js function should be done. For this function I need some variables of the php code. How do I get them? If I get them I have to change them. So how do I got them (the changed variables) to php? I thought that ajax could perhaps help me. But how do I use ajax?

there are plenty of tutorials of how to use basic ajax - this is way too broad a question for SO. Sorry — Professor Abronsius, Apr 11 '19 at 18:25

score -1 · Accepted Answer · answered Apr 11 '19 at 18:27

Using a library like Axios or jQuery might help, compared to using Javascript's fetch function. Here's how you might achieve that using jQuery:

HTML

<button onClick="handleClick()">Click me<button>

Javascript

function handleClick() {
  console.log('Clicked the button')
    $.get('path/to/script.php', function (data) {
    // It helps if the data returned in the PHP script is JSON formatted
    console.log(data)
  });
}

How does an onclick funktion work, how do I get php informations to javascript, how do I get javascript informations to php and how do I use ajax js?

1 Answers1