WP function strip *img* from post content *if* post format is *image*

wp_strip_img_post_form_image_functions.php

<?php
// Strip Images from Content if Post Format Image
add_filter('the_content', 'strip_images',2);
if ( has_post_format( 'image', $postID )) {
        function strip_images($content){
                return preg_replace('/<img[^>]+./','',$content);
        }
}
?>