PHP and Wordpress Integration

Question 1

Q: What is the primary role of PHP in WordPress?

Answer 1

A: To process data, interact with the database, and generate dynamic HTML for web pages.

Question 2

Q: What is the name of the WordPress core PHP configuration file?

Answer 2

A: wp-config.php.

Question 3

Q: What global object is used to interact with the database in WordPress?

Answer 3

A: $wpdb.

Question 4

Q: How do you include a PHP file in a WordPress theme?

Answer 4

A: Use get_template_part() or require_once().

Question 5

Q: How do you add PHP code to a WordPress page or post?

Answer 5

A: Use a plugin like “Insert PHP Code Snippet” or write a custom shortcode.

Question 6

Q: How do you define a WordPress theme?

Answer 6

A: By creating a directory in /wp-content/themes/ with at least style.css and index.php.

Question 7

Q: What function is used to enqueue styles in a theme?

Answer 7

A: wp_enqueue_style().

Question 8

Q: What function is used to enqueue scripts in a theme?

Answer 8

A: wp_enqueue_script().

Question 9

Q: How do you add a theme support feature, like post thumbnails?

Answer 9

A: Use add_theme_support().

Question 10

Q: What PHP function outputs the content of the <title> tag?</title>

Answer 10

A: wp_title() (deprecated, use add_theme_support( ‘title-tag’ ) instead).

Question 11

Q: What is the minimum requirement for a WordPress plugin?

Answer 11

A: A PHP file with a plugin header comment.

Question 12

Q: How do you add an admin menu in a plugin?

Answer 12

A: Use add_menu_page() or add_submenu_page().

Question 13

Q: How do you register a plugin’s custom settings?

Answer 13

A: Use register_setting().

Question 14

Q: How do you enqueue plugin-specific scripts or styles?

Answer 14

A: Use wp_enqueue_scripts or admin_enqueue_scripts.

Question 15

Q: What PHP function activates a WordPress plugin?

Answer 15

A: Use the register_activation_hook() function.

Question 16

Q: What is an action hook in WordPress?

Answer 16

A: A point in the WordPress execution where a function can be hooked to perform an action.

Question 17

Q: What is a filter hook in WordPress?

Answer 17

A: A hook that allows you to modify data before it is used or displayed.

Question 18

Q: How do you attach a function to an action hook?

Answer 18

A: Use add_action().

Question 19

Q: How do you attach a function to a filter hook?

Answer 19

A: Use add_filter().

Question 20

Q: How do you remove a function from a hook?

Answer 20

A: Use remove_action() or remove_filter().

Question 21

Q: What function retrieves data from the WordPress database?

Answer 21

A: $wpdb->get_results().

Question 22

Q: How do you safely include variables in SQL queries?

Answer 22

A: Use $wpdb->prepare().

Question 23

Q: How do you insert data into the WordPress database?

Answer 23

A: Use $wpdb->insert().

Question 24

Q: How do you update data in the WordPress database?

Answer 24

A: Use $wpdb->update().

Question 25

Q: How do you delete data from the WordPress database?

Answer 25

A: Use $wpdb->delete().

Question 26

Q: What is a shortcode in WordPress?

Answer 26

A: A small piece of text in square brackets that executes PHP functions.

Question 27

Q: How do you register a new shortcode?

Answer 27

A: Use add_shortcode().

Question 28

Q: What is the syntax for a basic shortcode function?

Answer 28

function my_shortcode() {
return ‘Content to display’;
}
add_shortcode( ‘shortcode_name’, ‘my_shortcode’ );

Question 29

Q: How can you add attributes to a shortcode?

Answer 29

A: Use the $atts parameter in the shortcode function.

Question 30

Q: How do you output dynamic data in a shortcode?

Answer 30

A: Use PHP to retrieve and format the data inside the shortcode function.

Question 31

Q: What function registers a custom post type?

Answer 31

A: register_post_type().

Question 32

Q: How do you associate a taxonomy with a custom post type?

Answer 32

A: Use the taxonomies argument in register_post_type().

Question 33

Q: How do you set up custom capabilities for a post type?

Answer 33

A: Use the capability_type and capabilities arguments in register_post_type().

Question 34

Q: How do you create an archive page for a custom post type?

Answer 34

A: Create a archive-{post-type}.php file in the theme.

Question 35

Q: How do you flush rewrite rules after registering a custom post type?

Answer 35

A: Use flush_rewrite_rules() in the activation hook.

Question 36

Q: How do you register a custom REST API route in WordPress?

Answer 36

A: Use register_rest_route().

Question 37

Q: What is the hook for registering custom REST API routes?

Answer 37

A: rest_api_init.

Question 38

Q: What is the purpose of the callback argument in register_rest_route()?

Answer 38

A: Defines the function to execute when the endpoint is accessed.

Question 39

Q: How do you secure a custom REST API route?

Answer 39

A: Use the permission_callback argument.

Question 40

Q: How do you send a JSON response in the REST API?

Answer 40

A: Use the wp_send_json() or wp_send_json_success() function.