added Last Updated option to the Customizer

content.php

@@ -7,6 +7,7 @@
 		</div>
 		<?php ct_founder_featured_image(); ?>
 		<div class="post-content">
+			<?php ct_founder_output_last_updated_date(); ?>
 			<?php the_content(); ?>
 			<?php wp_link_pages( array(
 				'before' => '<p class="singular-pagination">' . __( 'Pages:', 'founder' ),

functions.php

@@ -760,4 +760,23 @@ function ct_founder_scroll_to_top_arrow() {
 		echo '<button id="scroll-to-top" class="scroll-to-top"><span class="screen-reader-text">'. esc_html__('Scroll to the top', 'founder') .'</span><i class="fas fa-arrow-up"></i></button>';
 	}
 }
-add_action( 'body_bottom', 'ct_founder_scroll_to_top_arrow');
+add_action( 'body_bottom', 'ct_founder_scroll_to_top_arrow');
+
+//----------------------------------------------------------------------------------
+// Output the "Last Updated" date on posts
+//----------------------------------------------------------------------------------
+function ct_founder_output_last_updated_date() {
+
+	global $post;
+
+	if ( get_the_modified_date() != get_the_date() ) {
+		$updated_post = get_post_meta( $post->ID, 'ct_founder_last_updated', true );
+		$updated_customizer = get_theme_mod( 'last_updated' );
+		if ( 
+			( $updated_customizer == 'yes' && ($updated_post != 'no') )
+			|| $updated_post == 'yes' 
+			) {
+				echo '<p class="last-updated">'. __("Last updated on", "founder") . ' ' . get_the_modified_date() . ' </p>';
+			}
+	}
+}

inc/customizer.php

@@ -309,6 +309,30 @@ public function render_content() {
 		)
 	) );
 
+	/***** Additional Options  *****/
+
+	// section
+	$wp_customize->add_section( 'ct_founder_additional_options', array(
+		'title'    => __( 'Additional Options', 'founder' ),
+		'priority' => 75
+	) );
+	// setting - last updated
+	$wp_customize->add_setting( 'last_updated', array(
+		'default'           => 'no',
+		'sanitize_callback' => 'founder_sanitize_yes_no_settings'
+	) );
+	// control - last updated
+	$wp_customize->add_control( 'last_updated', array(
+		'label'    => __( 'Display the date each post was last updated?', 'founder' ),
+		'section'  => 'ct_founder_additional_options',
+		'settings' => 'last_updated',
+		'type'     => 'radio',
+		'choices'  => array(
+			'yes' => __( 'Yes', 'founder' ),
+			'no'  => __( 'No', 'founder' )
+		)
+	) );
+
 	/***** Custom CSS *****/
 
 	if ( function_exists( 'wp_update_custom_css_post' ) ) {
@@ -326,7 +350,7 @@ public function render_content() {
 		// section
 		$wp_customize->add_section( 'founder_custom_css', array(
 			'title'    => __( 'Custom CSS', 'founder' ),
-			'priority' => 70
+			'priority' => 80
 		) );
 		// setting
 		$wp_customize->add_setting( 'custom_css', array(

rtl.css

@@ -1521,6 +1521,10 @@ a img {
   background: #EDEDED;
 }
 
+.last-updated {
+  font-style: italic;
+}
+
 .wp-block-image.alignfull,
 .wp-block-cover {
   position: relative;

sass/_post.scss

@@ -275,6 +275,9 @@
     background: $color-gray-93;
   }
 }
+.last-updated {
+  font-style: italic;
+}
 
 // New Gutenberg blocks
 .wp-block-image.alignfull,

style.css

@@ -1521,6 +1521,10 @@ a img {
   background: #EDEDED;
 }
 
+.last-updated {
+  font-style: italic;
+}
+
 .wp-block-image.alignfull,
 .wp-block-cover {
   position: relative;