wp-simple-donation.php

<?php
/**
 * Plugin Name: Simple Donation Plugin
 * Plugin URI:  https://github.com/tejasjundre/wp-simple-donation
 * Description: A basic WordPress plugin that registers a "Donations" custom post type and provides a [donation_form] shortcode.
 * Version:     1.0
 * Author:      Tejas Jundre
 * Author URI:  https://github.com/tejasjundre
 * License:     GPL2
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 * Text Domain: wp-simple-donation
 */

if ( ! defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

// Register Custom Post Type: Donation
function wp_simple_donation_cpt() {
    $labels = array(
        'name' => 'Donations',
        'singular_name' => 'Donation',
    );
    $args = array(
        'labels' => $labels,
        'public' => true,
        'supports' => array('title', 'editor', 'custom-fields'),
        'menu_icon' => 'dashicons-heart',
    );
    register_post_type( 'donation', $args );
}
add_action( 'init', 'wp_simple_donation_cpt' );

// Donation Form Shortcode
function wp_simple_donation_form() {
    ob_start();
    ?>
    <form method="post" action="">
        <label for="donor_name">Name:</label><br>
        <input type="text" name="donor_name" required><br><br>

        <label for="donation_amount">Amount:</label><br>
        <input type="number" name="donation_amount" required><br><br>

        <input type="submit" name="donate_now" value="Donate">
    </form>
    <?php
    // Handle form submission
    if ( isset($_POST['donate_now']) ) {
        $name = sanitize_text_field($_POST['donor_name']);
        $amount = floatval($_POST['donation_amount']);
        wp_insert_post( array(
            'post_title' => 'Donation from ' . $name,
            'post_type'  => 'donation',
            'post_status'=> 'publish',
            'meta_input' => array('amount' => $amount),
        ) );
        echo '<p>Thank you for your donation, ' . esc_html($name) . '!</p>';
    }
    return ob_get_clean();
}
add_shortcode( 'donation_form', 'wp_simple_donation_form' );