How Can I Call PHP Functions Using Button Clicks Without Reloading the Page?

Calling PHP Functions with Button Clicks: A Guide

In this article, we explore a common challenge faced by PHP developers: calling PHP functions on button clicks. We'll provide a step-by-step guide to solving this issue effectively.

The Problem

When attempting to execute a PHP function on a button click, there's a pitfall that can lead to the absence of any output: relying solely on HTML form submission. This approach won't execute the desired function without additional measures.

The Solution: AJAX to the Rescue

To bridge the gap between HTML and PHP, we'll introduce Ajax (Asynchronous JavaScript and XML). Ajax allows us to make HTTP requests without reloading the page, enabling communication between client and server.

Step 1: Modify the HTML Markup

Change the existing submit buttons to>

<input type="submit">

Step 2: Introduce jQuery

Load jQuery into your page and define a click event handler for the ".button" elements. Within the handler, capture the button's value and make an Ajax post request to a designated PHP script, ajax.php.

$(document).ready(function(){
    $('.button').click(function(){
        var clickBtnValue = $(this).val();
        var ajaxurl = 'ajax.php',
        data =  {'action': clickBtnValue};
        $.post(ajaxurl, data, function (response) {
            // Response div goes here.
            alert("action performed successfully");
        });
    });
});

Step 3: Handle the Ajax Request

In ajax.php, we'll use a switch statement to differentiate between the insert and select actions, calling the corresponding functions. We'll also echo the result for display on the page.

<?php if (isset($_POST['action'])) {
        switch ($_POST['action']) {
            case 'insert':
                insert();
                break;
            case 'select':
                select();
                break;
        }
    }

    function select() {
        echo "The select function is called.";
        exit;
    }

    function insert() {
        echo "The insert function is called.";
        exit;
    }
?>

Enjoy Dynamic PHP Function Calls

By adopting this Ajax-based approach, you can now call PHP functions on button clicks and display the results seamlessly on the same page. Embrace the power of Ajax to enhance user interaction and achieve a responsive and dynamic web experience.

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