How to call php code from button onclick with Ajax?-CodePudding

I'm new into php and I am trying to call code from another file. I try to use ajax to so, because later I would like to add parameters. But unfortunattely for me nothing appen when I click on my button.

I have a button in my file admin.php that is written like this:

<button onclick="clickMe()"> Click </button>

And in the same file I have my ajax code in script balise:

    <script>
                function clickMe() {
                    $.ajax( {
                        url: 'delete.php',
                        type: "POST",
                        success: test() {
                            alert('ok');
                        }
                        error : test(){
                                alert("error");                                  
                            }
                    });
                }
</script>

And here is the code that I'm trying to call in my ajax, the function test in the file delete.php:

<?php

function test() {
    echo "Hello the World! ";
}

?>

I wondering if I maybe need to put the code in delete.php in a function ?

Do you think I need to post the entirety of my admin.php file, even thought a lot of the code is not related to the question ?

EDIT: I forgot to mention; i have require delete file in my admin one:

require 'delete.php';

CodePudding user response：

I don't know jQuery, but I think your code should look something like this:

<?php
// delete.php
// make somthing
return 'Helo Word';

<script>
function clickMe() {
    $.ajax( {
        url: 'delete.php',
        type: "POST",
        success: response => {
            alert(reponse);
        },
        error: error => {
            alert(error);
        }
    });
}
</script>

CodePudding user response：

let's assume that your js code is working(i'm bad with JQuery). The JS code and the PHP code are living in different worlds but can connect by HTTP requests(XML-AJAX) and some others.

You can do a request to a PHP page like my-domain.com/the-page.php?get_param_1=value(GET method), and you can pass the same params(and a little more) by POST method. GET and POST params are looking like : param_name=param_value&param_name=param_value&param_name=param_value

You can't call directly PHP function(like var_dump('123);), but you can do this request with JS my-domain.com/the-page.php?call_func=myFunc123&printIt=HelloMate

to php page

<?php

function myFunc123($printText) { echo $printText; }

if (array_key_exists('call_func', $_GET)) {
   
   $param_callFunc = $_GET['call_func'];
   
   if ($param_callFunc == 'myFunc123') { myFunc123($_GET['printIt']); }
   
}

?>

Yes, you can pass any existing function name and call it, but it's not safe in future usage. Above, i use "page" word because you should do a request, not php file read or access.

CodePudding user response：

you should try calling test() function, just do something like that:

<?php

function test() {
    echo "Hello the World! ";
}

test();

?>