Basic functions file for a general Wordpress Theme Setup

WP: General Functions File

<?php
/**
 * Custom Theme functions and definitions.
 *
 * @link https://developer.wordpress.org/themes/basics/theme-functions/
 *
 * @package Custom_Theme
 */

/*--------------------------------------------------------------
Custom Admin Logo
--------------------------------------------------------------*/

add_filter('login_headerurl', create_function(false,"return '/';"));
add_action("login_head", "custom_login_logo");

function custom_login_logo() {
	echo "
	<style>
	body.login #login h1 a {
		background: url('".get_bloginfo('template_url')."/img/logos/admin-logo.svg') no-repeat scroll center top transparent !important;
		background-size: cover;
	    height: 55px;
	    width: 320px;
	}
	body.login {
		background: #191919;
	}
	body.login #login {
		    padding: 10% 0 0;
	}
	</style>
	";
}

/*----------------------------------------------------------------------
Setup defaults and registers support for various WordPress features.
----------------------------------------------------------------------*/

if ( ! function_exists( 'custom_setup' ) ) :

	/*----------------------------------------------------------------------
	Sets up theme defaults and registers support for various WordPress 
	features. Note that this function is hooked into the after_setup_theme 
	hook, which runs before the init hook. The init hook is too late for
	some  features, such as indicating support for post thumbnails.
	----------------------------------------------------------------------*/

	function custom_setup() {

		/*----------------------------------------------------------------------
		Make theme available for translation. Translations can be filed in the 
		/languages/ directory. If you're building a theme based on this 
		theme, use a find and replace to change 'custom-theme' to 
		the name of your theme in all the template files.
		----------------------------------------------------------------------*/

		load_theme_textdomain( 'custom-theme', get_template_directory() . '/languages' );

		/*----------------------------------------------------------------------
		Add default posts and comments RSS feed links to head.
		----------------------------------------------------------------------*/
		
		add_theme_support( 'automatic-feed-links' );

		/*----------------------------------------------------------------------
		Let WordPress manage the document title.
		----------------------------------------------------------------------*/

		add_theme_support( 'title-tag' );

		/*----------------------------------------------------------------------
		Enable support for Post Thumbnails on posts and pages.
		add_image_size( string $name, int $width, int $height, bool )
		ex. custom-size, 220 pixels wide by 180 pixels tall, hard crop mode
		----------------------------------------------------------------------*/
		
		add_theme_support( 'post-thumbnails' );
		add_image_size( 'custom-size', 220, 180, true );

		/*----------------------------------------------------------------------
		Removes default image sizes from being created.
		----------------------------------------------------------------------*/

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

		/*--------------------------------------------------------------
		Menus
		--------------------------------------------------------------*/

		register_nav_menus( array(
			'main_nav' => 'Main Menu',
			'secondary_nav' => 'Secondary Menu',
			'social_nav' => 'Social Menu',
			'footer_nav' => 'Footer Menu',
		));
		
		/*----------------------------------------------------------------------
		Switch default core markup for search form, comment form, and comments 
		to output valid HTML5.
		----------------------------------------------------------------------*/
		add_theme_support( 'html5', array(
			'search-form',
			'comment-form',
			'comment-list',
			'gallery',
			'caption',
		));

		/*--------------------------------------------------------------
		Enqueue scripts and styles.
		--------------------------------------------------------------*/

		if (!is_admin()) add_action("wp_enqueue_scripts", "custom_scripts", 11);

		function custom_scripts() {

			wp_enqueue_style( 'style', get_template_directory_uri() . '/css/style.css' );
			wp_enqueue_style( 'custom-styles', get_template_directory_uri() . '/layouts/custom-styles.css' );

			wp_deregister_script('jquery');
			wp_enqueue_script('jquery', "http" . ($_SERVER['SERVER_PORT'] == 443 ? "s" : "") . "://ajax.googleapis.com/ajax/libs/jquery/2.2.4/jquery.min.js", array(), false, true);
			wp_enqueue_script('overflowVendor', get_template_directory_uri() . '/js/lib/scrolloverflow.js', array( 'jquery' ), false, true);
			wp_enqueue_script('plugin', get_template_directory_uri() . '/js/plugins.js', array( 'jquery' ), false, true);
			wp_enqueue_script('scripts', get_template_directory_uri() . '/js/scripts.js', array( 'jquery' ), false, true);

			if ( is_singular() && comments_open() && get_option( 'thread_comments' ) ) {
				wp_enqueue_script( 'comment-reply' );
			}
		}

		/*--------------------------------------------------------------
		ACF Options Page
		--------------------------------------------------------------*/

		if( function_exists('acf_add_options_page') ) {
		
			acf_add_options_page(array(
				'page_title' 	=> 'Theme General Settings',
				'menu_title'	=> 'Theme Settings',
				'menu_slug' 	=> 'theme-general-settings',
				'capability'	=> 'edit_posts',
				'redirect'		=> false
			));
			
			acf_add_options_sub_page(array(
				'page_title' 	=> 'Theme Header Settings',
				'menu_title'	=> 'Header',
				'parent_slug'	=> 'theme-general-settings',
			));
			
			acf_add_options_sub_page(array(
				'page_title' 	=> 'Theme Footer Settings',
				'menu_title'	=> 'Footer',
				'parent_slug'	=> 'theme-general-settings',
			));
			
		}

	}

endif;

add_action( 'after_setup_theme', 'custom_setup' );

/*--------------------------------------------------------------
SVG Support for Wordpress
--------------------------------------------------------------*/

function cc_mime_types($mimes) {
	$mimes['svg'] = 'image/svg+xml';
	return $mimes;
}
add_filter('upload_mimes', 'cc_mime_types');

/*--------------------------------------------------------------
Update CSS within in Admin
--------------------------------------------------------------*/

function admin_style() {
	wp_enqueue_style( 'admin-style', get_template_directory_uri() . '/css/admin.css' );
}
add_action('admin_enqueue_scripts', 'admin_style');

/*--------------------------------------------------------------
Custom Post Types
--------------------------------------------------------------*/

function custom_post_type () {

	register_post_type( 'work',
		array(
			'labels' => array(
				'name' => __( 'Work Sample' ),
				'singular_name' => __( 'Work Sample' ),
				'add_new' => __( 'Add New Work Sample' ),
				'add_new_item' => __( 'Add New Work Sample' ),
				'new_item' => __( 'New Work Sample' ),
				'edit_item' => __( 'Edit Work Sample' ),
				'view_item' => __( 'View Work Sample' )
			),
			'menu_position' => 20,
			'menu_icon'   => 'dashicons-analytics',
			'show_in_nav_menus' => true,
			'public'=> true,
			'supports' => array( 'title', 'thumbnail'),
			'taxonomies'  => array( 'category'),
			'hierarchical' => true
		)
	);

}
add_action( 'init', 'custom_post_type', 0 );

/*--------------------------------------------------------------
Custom Columns
--------------------------------------------------------------*/

function work_column_label($columns)
{
	$columns = array(
		'cb'	 	 => '<input type="checkbox" />',
		'title' 	 => 'Title',
		'client' 	 => 'Client',
		'categories' => 'Category',
		'date'		 =>	'Date',
	);
	return $columns;
}

function work_column_content($column)
{
	global $post;
	
	if ($column == 'client') {
		
		if(get_field('client')) {
			
			$post = get_field('client', $post->ID);
			setup_postdata( $post ); 

				echo the_title();

			wp_reset_postdata();

		} else {

			echo 'None';

		}
	}
}

add_action("manage_pages_custom_column", "work_column_content");
add_filter("manage_edit-work_columns", "work_column_label");

/*--------------------------------------------------------------
Removes a class from the body_class array.
--------------------------------------------------------------*/
 
add_filter( 'body_class', function( $classes ) {
    if ( isset( $classes['customize-support'] ) ) {
        unset( $classes['customize-support'] );
    }
    return $classes;
} );

/*--------------------------------------------------------------
Custom theme option styles
--------------------------------------------------------------*/

function generate_options_css() {
    $ss_dir = get_stylesheet_directory();
    ob_start(); // Capture all output into buffer
    require($ss_dir . '/inc/custom-styles.php'); // Grab the custom-style.php file
    $css = ob_get_clean(); // Store output in a variable, then flush the buffer
    file_put_contents($ss_dir . '/layouts/custom-styles.css', $css, LOCK_EX); // Save it as a css file
}
add_action( 'acf/save_post', 'generate_options_css' ); //Parse the output and write the CSS file on post save

/*--------------------------------------------------------------
Custom ACF Styles and Scripts
--------------------------------------------------------------*/

function my_acf_admin_head() 
	{ ?>
		<style type="text/css">

			.wp-asset-icon img {
				min-width: 300px;
			}

		</style>

		<script type="text/javascript">
		(function($){

			/* ... */

		})(jQuery);
		</script>
		
	<?php }

add_action('acf/input/admin_head', 'my_acf_admin_head');

/*--------------------------------------------------------------
Removes admin margin-top
--------------------------------------------------------------*/

add_action('get_header', 'my_filter_head');

function my_filter_head() {
	remove_action('wp_head', '_admin_bar_bump_cb');
}