Sindbad~EG File Manager

<?php
/**
 * Quickscrum by NiceThemes.
 *
 * This file contains a class to create the Blog Author widget.
 *
 * @package   Quickscrum
 * @author    NiceThemes <hello@nicethemes.com>
 * @license   GPL-2.0+
 * @link      http://nicethemes.com/product/Quickscrum
 * @copyright 2020 NiceThemes
 * @since     1.0.0
 */
// If this file is called directly, abort.
if ( ! defined( 'WPINC' ) ) {
	die;
}

class Nice_BlogAuthor extends WP_Widget {

	function __construct() {

		$this->alt_option_name = 'nice_blogauthor';

		parent::__construct( 'nice_blogauthor', __( '(NiceThemes) Blog Author', 'nicethemes' ), [ 'description' => __( 'This widget includes Blog Author Info.', 'nicethemes' ) ] );

		add_action( 'save_post', [ &$this, 'flush_widget_cache' ] );
		add_action( 'deleted_post', [ &$this, 'flush_widget_cache' ] );
		add_action( 'switch_theme', [ &$this, 'flush_widget_cache' ] );

   } // end __construct()

	function widget( $args, $instance ) {

		$cache = wp_cache_get( 'widget_nice_blogauthor', 'widget' );

		if ( ! is_array( $cache) )
			$cache = [];

		if ( ! isset( $args['widget_id'] ) )
			$args['widget_id'] = $this->id;

		if ( isset( $cache[ $args['widget_id'] ] ) ) {
			echo $cache[ $args['widget_id'] ];
			return;
		}

		ob_start();

		extract( $args );
		$title          = $instance['title'];
		$bio            = $instance['bio'];
		$twitter        = $instance['twitter'];
		$custom_email   = $instance['custom_email'];
		$avatar_size    = $instance['avatar_size']; if ( ! $avatar_size ) $avatar_size = 50;
		$avatar_align   = $instance['avatar_align']; if ( ! $avatar_align ) $avatar_align = 'left';
		$read_more_text = $instance['read_more_text'];
		$read_more_url  = $instance['read_more_url'];
		$page           = $instance['page'];
		if ( ( $page == "home" && is_home() ) || ( $page == "single" && is_single() ) || $page == "all" ) {
		?>
			<?php echo $before_widget; ?>
			<?php if ($title) { echo $before_title . $title . $after_title; } ?>

			<span class="<?php echo $avatar_align; ?>"><div class="thumb"><?php if ( $custom_email ) echo get_avatar( $custom_email, $size = $avatar_size ); ?></div></span>
			<p><?php echo $bio; ?></p>
			<?php if ( $read_more_url ) echo '<p><a href="' . esc_url( $read_more_url ) . '">' . $read_more_text . '</a></p>'; ?>
			<?php if ( $twitter ) echo '<p><a href="http://twitter.com/' . esc_url( $twitter ) . '" class="twitter">' . __('Follow me on twitter', 'nicethemes') . '</a></p>'; ?>
			<div class="fix"></div>
			<?php echo $after_widget; ?>
		<?php
		}

		$cache[$args['widget_id']] = ob_get_flush();
		wp_cache_set('widget_nice_blogauthor', $cache, 'widget');

	}

	function update($new_instance, $old_instance) {

		$this->flush_widget_cache();

		$alloptions = wp_cache_get( 'alloptions', 'options' );
		if ( isset($alloptions['nice_feedback']) )
			delete_option('nice_feedback');

		return $new_instance;
	}

	function flush_widget_cache() {
		wp_cache_delete('widget_nice_blogauthor', 'widget');
	}

	function form($instance) {

		$title          = esc_attr( $instance['title'] );
		$bio            = esc_attr( $instance['bio'] );
		$twitter        = esc_attr( $instance['twitter'] );
		$custom_email   = esc_attr( $instance['custom_email'] );
		$avatar_size    = esc_attr( $instance['avatar_size'] );
		$avatar_align   = esc_attr( $instance['avatar_align'] );
		$read_more_text = esc_attr( $instance['read_more_text'] );
		$read_more_url  = esc_attr( $instance['read_more_url'] );
		$page           = esc_attr( $instance['page'] );
		?>
		<p>
			<label for="<?php echo $this->get_field_id('title'); ?>"><?php _e( 'Title:','nicethemes' ); ?></label>
			<input type="text" name="<?php echo esc_attr( $this->get_field_name('title') ); ?>"  value="<?php echo $title; ?>" class="widefat" id="<?php echo esc_attr( $this->get_field_id('title') ); ?>" />
		</p>
		<p>
			<label for="<?php echo $this->get_field_id('bio'); ?>"><?php _e( 'Bio:','nicethemes' ); ?></label>
			<textarea name="<?php echo esc_attr( $this->get_field_name('bio') ); ?>" class="widefat" id="<?php echo esc_attr( $this->get_field_id('bio') ); ?>"><?php echo $bio; ?></textarea>
		</p>
		<p>
			<label for="<?php echo $this->get_field_id('twitter'); ?>"><?php _e( '<a href="http://twitter.com/">Twitter</a> Username:','nicethemes' ); ?></label>
			<input type="text" name="<?php echo esc_attr( $this->get_field_name('twitter') ); ?>"  value="<?php echo $twitter; ?>" class="widefat" id="<?php echo esc_attr( $this->get_field_id('twitter') ); ?>" />
		</p>
		<p>
			<label for="<?php echo $this->get_field_id('custom_email'); ?>"><?php _e( '<a href="http://www.gravatar.com/">Gravatar</a> E-mail:','nicethemes' ); ?></label>
			<input type="text" name="<?php echo esc_attr( $this->get_field_name('custom_email') ); ?>"  value="<?php echo $custom_email; ?>" class="widefat" id="<?php echo esc_attr( $this->get_field_id('custom_email') ); ?>" />
		</p>
		<p>
			<label for="<?php echo $this->get_field_id('avatar_size'); ?>"><?php _e( 'Gravatar Size:','nicethemes' ); ?></label>
			<input type="text" name="<?php echo esc_attr( $this->get_field_name('avatar_size') ); ?>"  value="<?php echo $avatar_size; ?>" class="widefat" id="<?php echo esc_attr( $this->get_field_id('avatar_size') ); ?>" />
		</p>
		<p>
			<label for="<?php echo $this->get_field_id('avatar_align'); ?>"><?php _e( 'Gravatar Alignment:','nicethemes' ); ?></label>
			<select name="<?php echo esc_attr( $this->get_field_name('avatar_align') ); ?>" class="widefat" id="<?php echo esc_attr( $this->get_field_id('avatar_align') ); ?>">
				<option value="left" <?php if ( $avatar_align == "left" ){ echo "selected='selected'";} ?>><?php _e( 'Left', 'nicethemes' ); ?></option>
				<option value="right" <?php if ( $avatar_align == "right" ){ echo "selected='selected'";} ?>><?php _e( 'Right', 'nicethemes' ); ?></option>
			</select>
		</p>
		<p>
			<label for="<?php echo $this->get_field_id('read_more_text'); ?>"><?php _e( 'Read More Text (optional):','nicethemes' ); ?></label>
			<input type="text" name="<?php echo esc_attr( $this->get_field_name('read_more_text') ); ?>"  value="<?php echo $read_more_text; ?>" class="widefat" id="<?php echo esc_attr( $this->get_field_id('read_more_text') ); ?>" />
		</p>
		<p>
			<label for="<?php echo $this->get_field_id('read_more_url'); ?>"><?php _e( 'Read More URL (optional):','nicethemes' ); ?></label>
			<input type="text" name="<?php echo esc_attr( $this->get_field_name('read_more_url') ); ?>"  value="<?php echo $read_more_url; ?>" class="widefat" id="<?php echo esc_attr( $this->get_field_id('read_more_url') ); ?>" />
		</p>
		<p>
			<label for="<?php echo $this->get_field_id('page'); ?>"><?php _e( 'Visible Pages:','nicethemes' ); ?></label>
			<select name="<?php echo $this->get_field_name('page'); ?>" class="widefat" id="<?php echo $this->get_field_id('page'); ?>">
				<option value="all" <?php if ( $page == "all" ) { echo "selected='selected'";} ?>><?php _e( 'All', 'nicethemes' ); ?></option>
				<option value="home" <?php if ( $page == "home" ) { echo "selected='selected'";} ?>><?php _e( 'Home only', 'nicethemes' ); ?></option>
				<option value="single" <?php if ( $page == "single" ) { echo "selected='selected'";} ?>><?php _e( 'Single only', 'nicethemes' ); ?></option>
			</select>
		</p>
		<?php
	}
} // end Nice_BlogAuthor classs