Simplify the admin

add-help-text.php

function my_post_guidelines() {

  $screen = get_current_screen();

  if ( 'post' != $screen->post_type )
    return;

  $args = array(
    'id'      => 'my_website_guide',
    'title'   => 'Content Guidelines',
    'content' => '
    	<h3>Website Content Guidelines</h3>
    	<p>All content on this website must be unique. Formatting must be relegated to level 2 headings and down, level 1 headings should not be used in the post content.</p>
    	<p>
		All images should be inserted with the media editor and should have a title, alt text and a descriptive caption.
    	</p>
    ',  
  );
  
  // Add the help tab.
  $screen->add_help_tab( $args );

}

add_action('admin_head', 'my_post_guidelines');

basic-widget.php

add_action( 'wp_dashboard_setup', 'register_my_dashboard_widget' );
function register_my_dashboard_widget() {
	wp_add_dashboard_widget(
		'my_dashboard_widget',
		'My Dashboard Widget',
		'my_dashboard_widget_display'
	);

}

function my_dashboard_widget_display() {
    echo 'Hello, I am Mr. Widget';
}

disable-deactivation.php

add_filter( 'plugin_action_links', 'bsb_disable_plugin_actions', 10, 4 );

function bsb_disable_plugin_actions( $actions, $plugin_file, $plugin_data, $context ) {
	$plugins = array( 'advanced-custom-fields-pro/acf.php' );
	if ( array_key_exists( 'deactivate', $actions ) && in_array( $plugin_file, $plugins ))
		unset( $actions['deactivate'] );
	return $actions;
}

disable-edit.php

define( 'DISALLOW_FILE_EDIT', true );

guideline-widget.php

add_action( 'wp_dashboard_setup', 'register_my_dashboard_widget' );
function register_my_dashboard_widget() {
	wp_add_dashboard_widget(
		'my_dashboard_widget',
		'Website Guidelines',
		'my_dashboard_widget_display'
	);

}

function my_dashboard_widget_display() {
    ?>
    <p>Howdy Mr. Client, welcome to your website. Here are some quick guidelines to keep in mind when using the site.</p>


	<h4><strong>Plugins</strong></h4>
    <p>If you'd like to use any plugin please let us know first so we can vet it to make sure the code quality is good.</p>

	<h4><strong>Images</strong></h4>
    <p>Please make sure to always add good title and proper alt text to images. This makes single attachment pages better and does some SEO magic as well.</p> 

	<h4><strong>Important Links</strong></h4>
    <ul>
		<li><a href='<?php echo admin_url("post-new.php") ?>'>New Post</a></li>
		<li><a href='<?php echo admin_url("edit.php?post_type=shop_order") ?>'>Shop Orders</a></li>
		<li><a href='<?php echo admin_url("profile.php") ?>'>Your Profile</a></li>
    </ul>


    <?php
}

remove-widgets.php

add_action('wp_dashboard_setup', 'remove_dashboard_widgets' );
function remove_dashboard_widgets() {
	global $wp_meta_boxes;
	unset($wp_meta_boxes['dashboard']['side']['core']['dashboard_quick_press']);
}

remove_menu_page.php

add_action( 'admin_menu', 'remove_menus' );
function remove_menus(){
	if ( !current_user_can( 'manage_options' ) ) {
		remove_menu_page( 'tools.php' );
		remove_menu_page( 'options-general.php' );
	}
}

remove_submenu_page.php

add_action( 'admin_menu', 'remove_themecheck', 999 );
function remove_themecheck() {
	if ( !current_user_can( 'manage_options' ) ) {
		remove_submenu_page( 'themes.php', 'themecheck' );
	}
}

tgm.php

require_once dirname( __FILE__ ) . '/class-tgm-plugin-activation.php';
 
add_action( 'tgmpa_register', 'my_theme_register_required_plugins' );
function my_theme_register_required_plugins() {
 
     $plugins = array(
 
        // This is an example of how to include a plugin pre-packaged with a theme.
        array(
            'name'               => 'TGM Example Plugin', // The plugin name.
            'slug'               => 'tgm-example-plugin', // The plugin slug (typically the folder name).
            'source'             => get_stylesheet_directory() . '/lib/plugins/tgm-example-plugin.zip', // The plugin source.
            'required'           => true, // If false, the plugin is only 'recommended' instead of required.
            'version'            => '', // E.g. 1.0.0. If set, the active plugin must be this version or higher.
            'force_activation'   => false, // If true, plugin is activated upon theme activation and cannot be deactivated until theme switch.
            'force_deactivation' => false, // If true, plugin is deactivated upon theme switch, useful for theme-specific plugins.
            'external_url'       => '', // If set, overrides default API URL and points to an external URL.
        ),
 
        // This is an example of how to include a plugin from a private repo in your theme.
        array(
            'name'               => 'TGM New Media Plugin', // The plugin name.
            'slug'               => 'tgm-new-media-plugin', // The plugin slug (typically the folder name).
            'source'             => 'https://s3.amazonaws.com/tgm/tgm-new-media-plugin.zip', // The plugin source.
            'required'           => true, // If false, the plugin is only 'recommended' instead of required.
            'external_url'       => 'https://github.com/thomasgriffin/New-Media-Image-Uploader', // If set, overrides default API URL and points to an external URL.
        ),
 
        // This is an example of how to include a plugin from the WordPress Plugin Repository.
        array(
            'name'      => 'BuddyPress',
            'slug'      => 'buddypress',
            'required'  => false,
        ),
 
    );
 
    /**
     * Array of configuration settings. Amend each line as needed.
     * If you want the default strings to be available under your own theme domain,
     * leave the strings uncommented.
     * Some of the strings are added into a sprintf, so see the comments at the
     * end of each line for what each argument will be.
     */
    $config = array(
        'default_path' => '',                      // Default absolute path to pre-packaged plugins.
        'menu'         => 'tgmpa-install-plugins', // Menu slug.
        'has_notices'  => true,                    // Show admin notices or not.
        'dismissable'  => true,                    // If false, a user cannot dismiss the nag message.
        'dismiss_msg'  => '',                      // If 'dismissable' is false, this message will be output at top of nag.
        'is_automatic' => false,                   // Automatically activate plugins after installation or not.
        'message'      => '',                      // Message to output right before the plugins table.
        'strings'      => array(
            'page_title'                      => __( 'Install Required Plugins', 'tgmpa' ),
            'menu_title'                      => __( 'Install Plugins', 'tgmpa' ),
            'installing'                      => __( 'Installing Plugin: %s', 'tgmpa' ), // %s = plugin name.
            'oops'                            => __( 'Something went wrong with the plugin API.', 'tgmpa' ),
            'notice_can_install_required'     => _n_noop( 'This theme requires the following plugin: %1$s.', 'This theme requires the following plugins: %1$s.' ), // %1$s = plugin name(s).
            'notice_can_install_recommended'  => _n_noop( 'This theme recommends the following plugin: %1$s.', 'This theme recommends the following plugins: %1$s.' ), // %1$s = plugin name(s).
            'notice_cannot_install'           => _n_noop( 'Sorry, but you do not have the correct permissions to install the %s plugin. Contact the administrator of this site for help on getting the plugin installed.', 'Sorry, but you do not have the correct permissions to install the %s plugins. Contact the administrator of this site for help on getting the plugins installed.' ), // %1$s = plugin name(s).
            'notice_can_activate_required'    => _n_noop( 'The following required plugin is currently inactive: %1$s.', 'The following required plugins are currently inactive: %1$s.' ), // %1$s = plugin name(s).
            'notice_can_activate_recommended' => _n_noop( 'The following recommended plugin is currently inactive: %1$s.', 'The following recommended plugins are currently inactive: %1$s.' ), // %1$s = plugin name(s).
            'notice_cannot_activate'          => _n_noop( 'Sorry, but you do not have the correct permissions to activate the %s plugin. Contact the administrator of this site for help on getting the plugin activated.', 'Sorry, but you do not have the correct permissions to activate the %s plugins. Contact the administrator of this site for help on getting the plugins activated.' ), // %1$s = plugin name(s).
            'notice_ask_to_update'            => _n_noop( 'The following plugin needs to be updated to its latest version to ensure maximum compatibility with this theme: %1$s.', 'The following plugins need to be updated to their latest version to ensure maximum compatibility with this theme: %1$s.' ), // %1$s = plugin name(s).
            'notice_cannot_update'            => _n_noop( 'Sorry, but you do not have the correct permissions to update the %s plugin. Contact the administrator of this site for help on getting the plugin updated.', 'Sorry, but you do not have the correct permissions to update the %s plugins. Contact the administrator of this site for help on getting the plugins updated.' ), // %1$s = plugin name(s).
            'install_link'                    => _n_noop( 'Begin installing plugin', 'Begin installing plugins' ),
            'activate_link'                   => _n_noop( 'Begin activating plugin', 'Begin activating plugins' ),
            'return'                          => __( 'Return to Required Plugins Installer', 'tgmpa' ),
            'plugin_activated'                => __( 'Plugin activated successfully.', 'tgmpa' ),
            'complete'                        => __( 'All plugins installed and activated successfully. %s', 'tgmpa' ), // %s = dashboard link.
            'nag_type'                        => 'updated' // Determines admin notice type - can only be 'updated', 'update-nag' or 'error'.
        )
    );
 
    tgmpa( $plugins, $config );
 
}