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How to Setup Your First Wordpress Plugin?
<h1>Very Simple Plugin Settings</h1>
<form id="vsp_settings_form" method="POST" action="<?= esc_url(admin_url('admin-post.php')); ?>">
<input type="hidden" name="action" value="vsp_update_option">
<label for="vsp_text_value">Highly Complicated Text</label>
<input type="text" name="vsp_text_value" id="vsp_text_value">
<?= submit_button("Submit") ?>
</form>
<?php
/**
* Plugin Name: My Very Simple Plugin
* Description: It does very simple things
* Author: Simple Man
*/
if (!defined('WPINC')) {
die;
}
define('PLUGIN_TITLE', 'Very Simple Plugin');
define('PLUGIN_TEXT_OPTION', 'vsp_plugin_text_option');
function vsp_setup_admin_page() {
require_once plugin_dir_path(__FILE__) . 'views/admin-settings.php';
}
function vsp_setup_admin_menu() {
add_menu_page(PLUGIN_TITLE, PLUGIN_TITLE, 'manage_options', 'vsp_admin_page', 'vsp_setup_admin_page');
}
function vsp_handle_update_option() {
try {
$value = sanitize_text_field($_POST['vsp_text_value']);
update_option(PLUGIN_TEXT_OPTION, $value);
wp_safe_redirect(
add_query_arg(array(
'page' => 'vsp_admin_page',
'success' => true,
), admin_url('admin.php'))
);
} catch (Exception $e) {
wp_safe_redirect(
add_query_arg(array(
'page' => 'vsp_admin_page',
'success' => false
), admin_url('admin.php'))
);
}
}
function vsp_admin_notice() {
if (!isset($_GET['success'])) {
return;
}
if ($_GET['success'] === 'false') {
echo '<div class="notice notice-error"><p>Something went wrong</p></div>';
return;
}
echo '<div class="notice notice-success"><p>Successfully updated settings!</p></div>';
return;
}
function vsp_display_option_shortcode() {
return get_option(PLUGIN_TEXT_OPTION);
}
add_action('admin_menu', 'vsp_setup_admin_menu');
add_action('admin_post_vsp_update_option', 'vsp_handle_update_option');
add_action('admin_notices', 'vsp_admin_notice');
add_shortcode('vsp_text', 'vsp_display_option_shortcode');
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