Default Featured Images

customizer.php

<?php
/**
 * mpress Theme Customizer.
 * @package mpress
 */

class Mpress_Theme_Customizer {
    private $sections;
    private $settings;
    private $controls;

    public function __construct() {
        add_action( 'customize_register', array( $this, 'core_theme_settings' ) );
        add_action( 'customize_register', array( $this, 'social_settings' ) );
        add_action( 'customize_register', array( $this, 'mpress_register_custom_logo' ) );
        add_action( 'customize_update_image_theme_mod', array( $this, 'customize_update_image_theme_mod' ), 10, 2 );
    }
    public function core_theme_settings( $wp_customize ) {
        // define section
        $section = array(
            'cabability'  => 'edit_theme_options',
            'title'       => __( 'Core Theme Settings', 'mpress' ),
            'description' => __( 'Customize Core Theme Settings' ),
            'priority'    => 10
        );
        // Register section
        $wp_customize->add_section( 'core_theme_settings_section', $section );
        // Define Settings
        $settings = array(
            'mpress_enqueue_jquery' => array(
                'default'    => 'wordpress',
                'type'       => 'theme_mod',
                'capability' => 'edit_theme_options',
                'transport'  => 'refresh'
            ),
            'mpress_jquery_location' => array(
                'default'    => false,
                'type'       => 'theme_mod',
                'capability' => 'edit_theme_options',
                'transport'  => 'refresh'
            ),
            'mpress_archive_type' => array(
                'default'    => 'content',
                'type'       => 'theme_mod',
                'capability' => 'edit_theme_options',
                'transport'  => 'refresh'
            ),
            'mpress_menu_type' => array(
                'default'    => 'dropdown',
                'type'       => 'theme_mod',
                'capability' => 'edit_theme_options',
                'transport'  => 'refresh'
            )
        );
        // Register Settings
        foreach( $settings as $key => $setting ) {
            $wp_customize->add_setting( $key, $setting );
        }
        // Define Controls
        $controls = array(
            'mpress_enqueue_jquery' => array(
                'label'     => __( 'Jquery Source', 'mpress' ),
                'section'   => 'core_theme_settings_section',
                'settings'  => 'mpress_enqueue_jquery',
                'type'      => 'radio',
                'choices'   => array(
                    'wordpress' => __( 'Wordpress Core', 'mpress' ),
                    'google'    => __( 'Google CDN', 'mpress' )
                )
            ),
            'mpress_jquery_location' => array(
                'label'       => __( 'Load JQuery in footer', 'mpress' ),
                'section'     => 'core_theme_settings_section',
                'settings'    => 'mpress_jquery_location',
                'type'        => 'checkbox'
            ),
            'mpress_archive_type' => array(
                'label'     => __( 'Archive Page Listing Type', 'mpress' ),
                'section'   => 'core_theme_settings_section',
                'settings'  => 'mpress_archive_type',
                'type'      => 'radio',
                'choices'   => array(
                    'content' => __( 'Full Content', 'mpress' ),
                    'excerpt' => __( 'Excerpt', 'mpress' )
                )
            ),
            'mpress_menu_type' => array(
                'label'     => __( 'Mobile Menu Type', 'mpress' ),
                'section'   => 'core_theme_settings_section',
                'settings'  => 'mpress_menu_type',
                'type'      => 'radio',
                'choices'   => array(
                    'dropdown'  => __( 'Simple (dropdown) Menu', 'mpress' ),
                    'offcanvas' => __( 'Off Canvas Menu', 'mpress' )
                )
            )
        );
        // Register Controls
        foreach( $controls as $key => $control ) {
            $wp_customize->add_control( $key, $control );
        }
    }
    public function social_settings( $wp_customize ) {
        // Get our list of social networks from the functions.php file
        $social_networks = mpress_social_network_settings();
        // If social networks isn't an array, or it's empty lets bail
        if( !is_array( $social_networks ) || empty( $social_networks ) ) {
            return;
        }
        // Add section
        $section = array(
            'cabability'  => 'edit_theme_options',
            'title'       => __( 'Social Settings', 'mpress' ),
            'description' => __( 'Set Social Network URI\'s' ),
            'priority'    => 10
        );
        $wp_customize->add_section( 'social_settings_section', $section );

        foreach( $social_networks as $key => $network ) {
            // Define Setting
            $setting = array(
                'default'           => $network['default'],
                'type'              => 'option',
                'capability'        => 'edit_theme_options',
                'transport'         => 'refresh',
                'sanitize_callback' => 'esc_url_raw'
            );
            $wp_customize->add_setting( $network['slug'], $setting );
            // Define control
            $control = array(
                'label'    => $network['label'],
                'section'  => 'social_settings_section',
                'setting'  => $network['slug'],
                'type'     => 'text',
            );
            $wp_customize->add_control( $network['slug'], $control );
        } // end foreach
    }

    public function mpress_register_custom_logo( $wp_customize  ) {
        $settings = array (
            'mpress_site_logo' => array(
                'default'    => null,
                'type'       => 'theme_mod',
                'capability' => 'edit_theme_options',
                'transport'  => 'refresh'
            ),
            'mpress_mobile_logo' => array(
                'default'    => null,
                'type'       => 'theme_mod',
                'capability' => 'edit_theme_options',
                'transport'  => 'refresh'
            ),
            'mpress_default_featured_image' => array(
                'default'    => null,
                'type'       => 'image_theme_mod',
                'capability' => 'edit_theme_options',
                'transport'  => 'refresh'
            ),
        );
        // Add our settings
        foreach( $settings as $key => $setting ) {
            $wp_customize->add_setting( $key, $setting );
        }

        $controls = array(
            'mpress_site_logo' => array (
                'label'    => __( 'Site Logo', 'mpress' ),
                'section'  => 'title_tagline',
                'settings' => 'mpress_site_logo'
            ),
            'mpress_mobile_logo' => array (
                'label'    => __( 'Mobile Logo', 'mpress' ),
                'section'  => 'title_tagline',
                'settings' => 'mpress_mobile_logo'
            ),
            'mpress_default_featured_image' => array (
                'label'    => __( 'Default Featured Image', 'mpress' ),
                'section'  => 'core_theme_settings_section',
                'settings' => 'mpress_default_featured_image'
            )
        );
        // Add controls
        foreach( $controls as $key => $control ) {
            $wp_customize->add_control( new WP_Customize_Image_Control( $wp_customize, $key, $control ) );
        }
    }

    public function customize_update_image_theme_mod( $value, $WP_Customize_Setting ) {
        $image_id = attachment_url_to_postid ( esc_url_raw( $value ) );
        if( $image_id ) {
            set_theme_mod( sprintf( '%s_id', $WP_Customize_Setting->id ) , $image_id );
        }
        set_theme_mod( $WP_Customize_Setting->id, $value );
    }
} // end class

$mpress_theme_customizer = new mpress_Theme_Customizer();

default_featured_img.php

if( !function_exists( 'mpress_featured_image' ) ) {
    function mpress_featured_image( $size = 'post-thumbnail', $attr = '' ) {
        // if post has a thumbnail, use it
        if( has_post_thumbnail() ) {
            the_post_thumbnail( $size, false, $attr );
            return;
        }
        // Else use default
        $default_id = get_theme_mod( 'mpress_default_featured_image_id', null );
        if( $default_id !== null ) {
            echo wp_get_attachment_image( $default_id, $size, false, $attr );
            return;
        }
        return false;
    }
}

if( !function_exists( 'get_mpress_featured_image' ) ) {
    function get_mpress_featured_image( $size = 'post-thumbnail', $attr = '' ) {
        // if post has a thumbnail, use it
        if( has_post_thumbnail() ) {
            return get_the_post_thumbnail( $size, false, $attr );
        }
        // Else use default
        $default_id = get_theme_mod( 'mpress_default_featured_image_id', null );
        if( $default_id !== null ) {
            return wp_get_attachment_image( $default_id, $size, false, $attr );
        }
        return false;
    }
}

if( !function_exists( 'mpress_featured_image_url' ) ) {
    function mpress_featured_image_url() {
        // if post has a thumbnail, use it
        if( has_post_thumbnail() ) {
            echo wp_get_attachment_url( get_post_thumbnail_id() );
            return;
        }
        // Else use default
        $default_url = get_theme_mod( 'mpress_default_featured_image', null );
        if( $default_id !== null ) {
            echo $default_url;
            return;
        }
        return false;
    }
}

if( !function_exists( 'get_mpress_featured_image_url' ) ) {
    function get_mpress_featured_image_url() {
        // if post has a thumbnail, use it
        if( has_post_thumbnail() ) {
            return wp_get_attachment_url( get_post_thumbnail_id() );
        }
        // Else use default
        $default_url = get_theme_mod( 'mpress_default_featured_image', null );
        if( $default_id !== null ) {
            return $default_url;
        }
        return false;
    }
}