DAILY TASK

/**

• Plugin Name: Daily Tasks
• Description: Set daily tasks for each day of the week and display them via shortcode.
• Version: 1.0
• Author: Marcin K
  */

// Hook to add settings page
add_action(‘admin_menu’, ‘dt_add_settings_page’);

function dt_add_settings_page() {
add_options_page(
‘Daily Tasks Settings’,
‘Daily Tasks’,
‘manage_options’,
‘daily-tasks’,
‘dt_render_settings_page’
);

// Register settings
add_action(‘admin_init’, ‘dt_register_settings’);

function dt_register_settings() {
register_setting(‘dt_settings_group’, ‘dt_tasks’);
}

// Render settings page
function dt_render_settings_page() {
$days = [‘Monday’, ‘Tuesday’, ‘Wednesday’, ‘Thursday’, ‘Friday’, ‘Saturday’, ‘Sunday’];
$tasks = get_option(‘dt_tasks’, []);
?>

Daily Tasks Settings

	<?php echo esc_textarea($tasks[$day] ?? ”); ?> Comma-separated list of tasks for .

<?php
}

// Shortcode to display today’s tasks
add_shortcode(‘daily_tasks’, ‘dt_display_tasks_for_today’);

function dt_display_tasks_for_today() {
$tasks = get_option(‘dt_tasks’, []);
$today = date(‘l’); // Monday, Tuesday, etc.

if (!isset($tasks[$today]) || empty($tasks[$today])) {
    return "<p>No tasks set for today ($today).</p>";
}

$task_list = array_map('trim', explode(',', $tasks[$today]));

$output = "<h3>Tasks for $today</h3><ul>";
foreach ($task_list as $task) {
    $output .= "<li>" . esc_html($task) . "</li>";
}
$output .= "</ul>";

return $output;

}

HEADER DATE
<?php
/**

• Plugin Name: Show Header Date
• Description: JUst show date
• Version: 0.1
• Author: MK
  */

add_action(‘wp_body_open’, ‘show_date_in_header’);

function show_date_in_header() {
echo ‘

🕒 Today is ‘ . current_time(‘l, F j, Y’) . ‘ ‘;
}

TESTIMONIAL MANAGER
ID, ‘_client_name’, true); $client_company = get_post_meta($post->ID, ‘_client_company’, true); ?>

<p>
    <label for="client_name">Client Name:</label><br>
    <input type="text" name="client_name" id="client_name" value="<?php echo esc_attr($client_name); ?>" style="width:100%;">
</p>
<p>
    <label for="client_company">Client Company:</label><br>
    <input type="text" name="client_company" id="client_company" value="<?php echo esc_attr($client_company); ?>" style="width:100%;">
</p>

<?php

}

add_action(‘save_post’, ‘tm_save_testimonial_meta’);

function tm_save_testimonial_meta($post_id) {
// Security checks
if (!isset($_POST[‘tm_testimonial_nonce’]) ||
!wp_verify_nonce($_POST[‘tm_testimonial_nonce’], basename(FILE))) {
return $post_id;
}

if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) return $post_id;

if ('testimonial' !== $_POST['post_type'] || !current_user_can('edit_post', $post_id)) {
    return $post_id;
}

// Save fields
$client_name = sanitize_text_field($_POST['client_name'] ?? '');
$client_company = sanitize_text_field($_POST['client_company'] ?? '');

update_post_meta($post_id, '_client_name', $client_name);
update_post_meta($post_id, '_client_company', $client_company);

}

function tm_custom_post_testimonial() {
// Set the labels. This variable is used in the $args array
$labels = array(
‘name’ => ( ‘Custom Testimonials’ ), ‘singular_name’ => ( ‘Custom Testimonial’ ),
‘add_new’ => ( ‘Add Custom Testimonial’ ), ‘add_new_item’ => ( ‘Add Custom Testimonial’ ),
‘edit_item’ => ( ‘Edit Custom Testimonial’ ), ‘new_item’ => ( ‘New Custom Testimonial’ ),
‘all_items’ => ( ‘All Custom Testimonials’ ), ‘view_item’ => ( ‘View Custom Testimonial’ ),
‘search_items’ => __( ‘Search Custom Testimonial’ ),
‘featured_image’ => ‘Poster’,
‘set_featured_image’ => ‘Add Poster’
);

$args = array(
‘labels’ => $labels,
‘description’ => ‘Holds our custom testimonials post specific data’,
‘public’ => true,
‘menu_position’ => 5,
‘supports’ => array( ‘title’, ‘editor’, ‘thumbnail’, ‘excerpt’, ‘comments’, ‘custom-fields’ ),
‘has_archive’ => true,
‘show_in_admin_bar’ => true,
‘show_in_nav_menus’ => true,
‘query_var’ => true,
);

register_post_type(‘testimonial’, $args);

}

add_shortcode(‘latest_testimonials’, ‘tm_display_latest_testimonials’);

function tm_display_latest_testimonials($atts) {
// Query the latest 5 testimonials
$args = array(
‘post_type’ => ‘testimonial’,
‘posts_per_page’ => 5,
‘post_status’ => ‘publish’,
);
$testimonials = new WP_Query($args);

if (!$testimonials->have_posts()) {
    return '<p>No testimonials found.</p>';
}

$output = '<div class="tm-testimonials">';

while ($testimonials->have_posts()) {
    $testimonials->the_post();

    $client_name = get_post_meta(get_the_ID(), '_client_name', true);
    $client_company = get_post_meta(get_the_ID(), '_client_company', true);

    $output .= '<blockquote style="margin-bottom:20px;">';
    $output .= '<p style="font-style:italic;">“' . get_the_content() . '”</p>';
    $output .= '<footer style="margin-top:10px;">– ' . esc_html($client_name);

    if (!empty($client_company)) {
        $output .= ', ' . esc_html($client_company);
    }

    $output .= '</footer>';
    $output .= '</blockquote>';
}

$output .= '</div>';

wp_reset_postdata();

return $output;

}

HOW USE FILTER

add_filter() allows you to modify data before it’s used — titles, content, options, markup, emails, etc.

add_filter( ‘some_hook’, ‘your_callback’ );

add_filter( $hook_name, $callback, $priority, $accepted_args );

$hook_name – string name of the filter (like the_content, excerpt_length)

$callback – your function name

$priority – order to run (lower = earlier). Default: 10

$accepted_args – how many arguments your function accepts. Default: 1

function my_custom_site_title( $title ) {
return ‘🚀 ‘ . $title;
}

add_filter( ‘wp_title’, ‘my_custom_site_title’ );

add_filter( ‘excerpt_length’, ‘custom_excerpt_length’, 20 );

function custom_excerpt_length( $length ) {
return 30;
}

✅ Here’s What You Do Need to Know

🔧 Core Concepts

These are must-know:

1. Plugin structure
   • Header comment block
   • functions.php vs plugin code
   • Hook system (add_action(), add_filter())
2. Hooks
   • How to use add_action() and add_filter()
   • Know a few key hooks:
     • init
     • admin_menu
     • wp_enqueue_scripts
     • save_post
     • wp_footer, wp_body_open
3. Shortcodes
   • add_shortcode()
   • return vs echo (like we discussed earlier)
4. Custom post types (CPTs)
   • register_post_type()
   • register_taxonomy() (optional but nice)
5. Custom fields / Meta boxes
   • add_meta_box()
   • get_post_meta(), update_post_meta()
   • wp_nonce_field() + security checks
6. Settings API (basic)
   • register_setting()
   • settings_fields(), get_option(), update_option()