A custom post type for photos

photo-cpt.php

<?php

    add_action( 'init', 'register_cpt_photo' );

    function register_cpt_photo() {

        $labels = array( 
            'name' => _x( 'Photos', 'photo' ),
            'singular_name' => _x( 'Photo', 'photo' ),
            'add_new' => _x( 'Add New', 'photo' ),
            'add_new_item' => _x( 'Add New Photo', 'photo' ),
            'edit_item' => _x( 'Edit Photo', 'photo' ),
            'new_item' => _x( 'New Photo', 'photo' ),
            'view_item' => _x( 'View Photo', 'photo' ),
            'search_items' => _x( 'Search Photos', 'photo' ),
            'not_found' => _x( 'No photos found', 'photo' ),
            'not_found_in_trash' => _x( 'No photos found in Trash', 'photo' ),
            'parent_item_colon' => _x( 'Parent Photo:', 'photo' ),
            'menu_name' => _x( 'Photos', 'photo' ),
        );

        $args = array( 
            'labels' => $labels,
            'hierarchical' => false,
            'supports' => array( 'title', 'editor', 'thumbnail', 'custom-fields', 'revisions' ),
            'public' => true,
            'show_ui' => true,
            'show_in_menu' => true,
            'menu_position' => 5,
            'menu_icon' => 'dashicons-camera',
            'show_in_nav_menus' => true,
            'publicly_queryable' => true,
            'exclude_from_search' => false,
            'has_archive' => true,
            'query_var' => true,
            'can_export' => true,
            'rewrite' => array( 
                'slug' => 'photos', 
                'with_front' => false,
                'feeds' => true,
                'pages' => true
            ),
            'capability_type' => 'post'
        );

        register_post_type( 'photo', $args );
    }