fsa-2017-example.php

<?php
function flexslider_admin_init() {
	if ( class_exists( 'Flexslider_Admin' ) ) {
		$sizes = array(
			array(
				'name'   => 'slides',
				'width'  => 1120,
				'height' => 630,
				'crop'   => true,
			),
			array(
				'name'   => 'slides-thumbnail',
				'width'  => '112',
				'height' => '63',
				'crop'   => true,
			),
		);

		Flexslider_Admin_Views::add_sizes( $sizes );
		add_filter( 'flexslider_admin_slide_width', function( $width ) {
			return 1120;
		} );
		add_filter( 'flexslider_admin_slide_height', function( $height ) {
			return 630;
		} );

		add_filter( 'flexslider_admin_thumbnail_size', function ( $size ) {
			return 'slides-thumbnail';
		} );
	}
}
add_action( 'init', 'flexslider_admin_init' );

function flexslider_init_scripts() {
	if ( is_front_page() ) {
		$flexslider_vars = array(
			'data' => array(
				'animation'      => get_theme_mod( 'fsa-slides_animation', 'fade' ),
				'easing'         => get_theme_mod( 'fsa-slides_easing', 'swing' ),
				'direction'      => get_theme_mod( 'fsa-slides_direction', 'horizontal' ),
				'slideshowSpeed' => ( get_theme_mod( 'fsa-slides_speed' ) ? get_theme_mod( 'fsa-slides_speed' ) : 7 ) * 1000,
				'animationSpeed' => ( get_theme_mod( 'fsa-slides_animation_speed' ) ? get_theme_mod( 'fsa-slides_animation_speed' ) : .6 ) * 1000,
				'initDelay'      => ( get_theme_mod( 'fsa-slides_start_delay' ) ? get_theme_mod( 'fsa-slides_start_delay' ) : 0 ) * 1000,
				'reverse'        => get_theme_mod( 'fsa-slides_reverse' ) ? get_theme_mod( 'fsa-slides_reverse' ) : false,
				'pauseOnAction'  => get_theme_mod( 'fsa-slides_pause_interaction' ) ? get_theme_mod( 'fsa-slides_pause_interaction' ) : false,
				'pauseOnHover'   => get_theme_mod( 'fsa-slides_pause_hover' ) ? get_theme_mod( 'fsa-slides_pause_hover' ) : true,
			),
		);

		$flexslider_inline = <<<EOT
jQuery( window ).load( function() {
	jQuery( '.flexslider' ).flexslider( {
		animation: flexslider_admin.data.animation,
		easing: flexslider_admin.data.easing,
		direction: flexslider_admin.data.direction,
		slideshowSpeed: flexslider_admin.data.slideshowSpeed,
		animationSpeed: flexslider_admin.data.animationSpeed,
		initDelay: flexslider_admin.data.initDelay,
		reverse: flexslider_admin.data.reverse,
		pauseOnAction: flexslider_admin.data.pauseOnAction,
		pauseOnHover: flexslider_admin.data.pauseOnHover,
	} );
} );
EOT;

		wp_enqueue_style( 'flexslider', 'https://www.example.com/path/to/flexslider/flexslider/flexslider.css' );
		wp_enqueue_script( 'flexslider', 'https://www.example.com/path/to/flexslider/flexslider/jquery.flexslider.js', array( 'jquery' ) );
		wp_add_inline_script( 'flexslider', $flexslider_inline );
		wp_localize_script( 'flexslider', 'flexslider_admin', $flexslider_vars );
	}
}
add_action( 'wp_enqueue_scripts', 'flexslider_init_scripts' );

function flexslider_admin_add_to_front_page( $content ) {
	if ( is_front_page() ) {
		ob_start();
		?>
		<div class="flexslider">
			<ul class="slides">
				<?php
				foreach ( Flexslider_Admin::get_slides() as $slide_id => $slide ) {
					$slide_image_html = get_the_post_thumbnail( $slide_id );
					$slide_title      = get_the_title( $slide_id );
					$slide_link       = $slide['url'];

					if ( ! empty( $slide_link ) ) {
						$slide_html = sprintf( '<a href="%s" title="%s">%s</a>',
							esc_url( $slide_link ),
							esc_attr( $slide_title ),
							$slide_image_html
						);
					} else {
						$slide_html = $slide_image_html;
					}

					echo sprintf( '<li>%s</li>', $slide_html ); // XSS Ok.
				}
				?>
			</ul>
		</div>
		<?php
		$content = ob_get_clean() . $content;
	}
	return $content;
}
add_filter( 'the_content', 'flexslider_admin_add_to_front_page' );