这是我第一次使用WordPress创建应用程序。在那里，我想做一个API，但不知道如何在WordPress中。
这是我在网站上的代码：

function drivers_post_type() {
    $labels = array(
        'name'                => _x( 'driver', 'Post Type General Name', 'text_domain' ),
        'singular_name'       => _x( 'driver', 'Post Type Singular Name', 'text_domain' ),
        'menu_name'           => __( 'driver', 'text_domain' ),
        'name_admin_bar'      => __( 'Post Type', 'text_domain' ),
        'parent_item_colon'   => __( 'Parent Item:', 'text_domain' ),
        'all_items'           => __( 'All Items', 'text_domain' ),
        'add_new_item'        => __( 'Add New Item', 'text_domain' ),
        'add_new'             => __( 'Add New', 'text_domain' ),
        'new_item'            => __( 'New Item', 'text_domain' ),
        'edit_item'           => __( 'Edit Item', 'text_domain' ),
        'update_item'         => __( 'Update Item', 'text_domain' ),
        'view_item'           => __( 'View Item', 'text_domain' ),
        'search_items'        => __( 'Search Item', 'text_domain' ),
        'not_found'           => __( 'Not found', 'text_domain' ),
        'not_found_in_trash'  => __( 'Not found in Trash', 'text_domain' ),
    );
    $args = array(
        'label'               => __( 'driver', 'text_domain' ),
        'description'         => __( 'driver', 'text_domain' ),
        'labels'              => $labels,
        'supports'            => array( 'title','thumbnail' ),
        'hierarchical'        => false,
        'public'              => true,
        'show_ui'             => true,
        'show_in_menu'        => true,
        'menu_position'       => 5,
        'show_in_admin_bar'   => true,
        'show_in_nav_menus'   => true,
        'can_export'          => true,
        'has_archive'         => true,
        'exclude_from_search' => false,
        'publicly_queryable'  => true,
        'rewrite'             => array('slug' => 'driver'),
        'capability_type'     => 'page',
    );
    register_post_type( 'drivers', $args );
}
// Hook into the 'init' action
add_action( 'init', 'drivers_post_type', 0 );

// Little function to return a custom field value
function driverMB_get_custom_field( $value ) {
  global $post;

    $custom_field = get_post_meta( $post->ID, $value, true );
    if ( !empty( $custom_field ) )
      return is_array( $custom_field ) ? stripslashes_deep( $custom_field ) : stripslashes( wp_kses_decode_entities( $custom_field ) );

    return false;
}

// Register the Metabox
function driverMB_add_custom_meta_box() {
    add_meta_box( 
        'driverMB-meta-box', 
        __( 'driver Info', 'textdomain' ), 
        'driverMB_meta_box_output', 
        'drivers', 
        'normal', 
        'default' 
    );
}
add_action( 'add_meta_boxes', 'driverMB_add_custom_meta_box' );

// Output the Metabox
function driverMB_meta_box_output( $post ) {
  // create a nonce field
  wp_nonce_field( 'my_driverMB_meta_box_nonce', 'driverMB_meta_box_nonce' ); ?>

    <p>
        <label><b>ID</b></label>
        <label><?php echo get_the_ID() ?></label>
    </p>
    <p>
        <label><b>Username</b></label>
        <input type="text" placeholder="Username" name="username" id="username" value="<?php echo driverMB_get_custom_field( 'username' ); ?>" style="width:100%;" />
    </p>
    <p>
        <label><b>Password</b></label>
        <input type="password" placeholder="Password" name="password" id="password" value="<?php echo driverMB_get_custom_field( 'password' ); ?>" style="width:100%;" />
    </p>
    <p>
        <label><b>Email</b></label>
        <input type="text" placeholder="Email" name="email" id="email" value="<?php echo driverMB_get_custom_field( 'email' ); ?>" style="width:100%;" />
    </p>
    <p>
        <label><b>Phone Number</b></label>
        <input type="text" placeholder="Ext : 088216192560" name="phone" id="phone" value="<?php echo driverMB_get_custom_field( 'phone' ); ?>" style="width:100%;" />
    </p>
    
  <?php
}

// Save the Metabox values
function driverMB_meta_box_save( $post_id ) {
  // Stop the script when doing autosave
  if( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) return;

  // Verify the nonce. If insn't there, stop the script
  if( !isset( $_POST['driverMB_meta_box_nonce'] ) || !wp_verify_nonce( $_POST['driverMB_meta_box_nonce'], 'my_driverMB_meta_box_nonce' ) ) return;

  // Stop the script if the user does not have edit permissions
  if( !current_user_can( 'edit_post' ) ) return;

    // Save the textfield
  if( isset( $_POST['username'] ) )
    update_post_meta( $post_id, 'username', esc_attr( $_POST['username'] ) );
  if( isset( $_POST['password'] ) )
    update_post_meta( $post_id, 'password', esc_attr( $_POST['password'] ) );
  if( isset( $_POST['email'] ) )
    update_post_meta( $post_id, 'email', esc_attr( $_POST['email'] ) );
  if( isset( $_POST['phone'] ) )
    update_post_meta( $post_id, 'phone', esc_attr( $_POST['phone'] ) );
}
add_action( 'save_post', 'driverMB_meta_box_save' );

我不知道如何将其创建为API。我的朋友告诉我创建如果URL等于然后执行动作功能，但我不知道如何？
有人告诉我或帮助我为WordPress创建一个API吗？