30+ Wordpress Interview Questions And Answers

If a WordPress site is hacked, immediately change all passwords, update all software, scan for malware, restore from a backup if necessary, and identify and fix the vulnerability.

Transients API in WordPress provides a way to store data that has an expiration time. It's a form of cache that can improve performance by storing temporary data.

To prevent WordPress from generating multiple image sizes, use the 'intermediate_image_sizes_advanced' filter to unset the sizes you don't want to be generated.

add_filter('intermediate_image_sizes_advanced', 'prefix_remove_default_images');
function prefix_remove_default_images($sizes) {
    unset($sizes['thumbnail']);
    unset($sizes['medium']);
    unset($sizes['large']);
    return $sizes;
}

A custom post type lets you create and manage content that isn't included in WordPress by default, like products, reviews, etc. It allows for more organized content management.

Use WP_Query with 'meta_key' and 'meta_value' or 'meta_query' for more complex queries based on meta fields.

$args = array(
    'meta_key' => 'color',
    'meta_value' => 'blue',
    'post_type' => 'product'
);
$query = new WP_Query($args);

You can define the function to modify default new post content, returning the custom content you wish to be displayed in the content editor for new posts.

function modify_default_new_post_content($content) {
    $content = 'Enter your content here...';
    return $content;
}

To disable the search feature, you can use a filter to return a 404 error for search queries or remove the search form template from the theme.

add_filter('get_search_form', '__return_false');

Use wp_enqueue_script() function in functions.php or with a specific action hook to properly include JavaScript files in WordPress. This ensures scripts are loaded correctly and avoids conflicts.

function add_custom_scripts() {
    wp_enqueue_script('custom-script', get_stylesheet_directory_uri() . '/js/custom-script.js', array('jquery'), false, true);
}
add_action('wp_enqueue_scripts', 'add_custom_scripts');

Posts are for dynamic content like articles or blog entries that can be categorized, tagged, and included in RSS feeds. Pages are static and not listed by date.

A WordPress nonce is a 'number used once' to protect URLs and forms from being misused. It's used to verify intent and prevent CSRF attacks.

wp_nonce_field('my_action', 'my_nonce_field');

To create a new sidebar, you register it in functions.php with register_sidebar() and then call dynamic_sidebar() within theme templates where you want it to appear.

register_sidebar(array(
    'name' => 'New Sidebar',
    'id' => 'new-sidebar',
    'description' => 'A custom sidebar for specific actions',
    'before_widget' => '
',
    'after_widget' => '
',
    'before_title' => '
',
    'after_title' => '
'
));

The $wpdb object is a global variable that WordPress uses to interact with the database. It provides methods for querying the database and manipulating data.

Use add_role() to create a custom user role, defining the role's name and associated capabilities.

add_role('custom_role', 'Custom Role', array(
    'read' => true,
    // ... other capabilities
));

A taxonomy in WordPress is a way to group posts and custom post types together. Common taxonomies include categories and tags, but custom taxonomies can be created.

The template hierarchy is the logic WordPress uses to determine which template file should be used to display a certain page of content. Specific files have priority over more generic ones.