function dozent_image_upload_field( $input_name = 'image_id', $current_image_id = null, $echo = true ){
		if ( ! $input_name ){
			$input_name = 'image_id';
		}

		ob_start();
		?>
        <div class="dozent-image-field-wrap">
            <a href="javascript:;" class="dozent-image-upload-toggle-btn">
				<?php
				$img_src = dozent_placeholder_img_src();
				if ( $current_image_id ) {
					$img_src = wp_get_attachment_image_url( $current_image_id, 'thumbnail' );
				}
				?>
                <img src="<?php echo $img_src; ?>" alt="" class="dozent-img-thumbnail" />
            </a>
            <input type="hidden" name="<?php echo $input_name; ?>" class="image-input" value="<?php echo $current_image_id; ?>">

            <div class="field-actions-wrap" style="display: none;">
                <button type="button" class="dozent-btn dozent-btn-primary dozent-image-field-upload-btn"><i class="dicon-pencil"></i></button>
                <button type="button" class="dozent-btn dozent-btn-danger dozent-image-field-clear-btn"><i class="dicon-trash-line"></i></button>
            </div>
        </div>
		<?php

		$html = apply_filters( 'dozent_image_upload_field', ob_get_clean(), $input_name, $current_image_id );

		if ( $echo ){
			echo $html;
		}

		return $html;
    }