Wordpress function to remove images from posts

no_images.php

<?php 
/**
 *  Remove images from post content
 *
 * credits: http://bavotasan.com/2011/a-better-way-to-remove-images-from-a-wordpress-post/
 *
 * This will remove images on ALL posts! If you don't want this, 
 * use it in the template code and then add 
 * remove_filter( 'the_content', 'og2013_no_images' );
 * you can also use <?php echo preg_replace("/\]*[.]*\>/i”,”",get_the_content(),1); ?>
 *
 * @since og2013 1.0
 */
if ( !function_exists( 'og2013_no_images' ) ) {
	function og2013_no_images( $content ) {
	   $postOutput = preg_replace('/<img[^>]+./','', $content);
	   return $postOutput;
	}
}

add_filter( 'the_content', 'og2013_no_images', 100 );  

If you want remove all images from a Wordpress post. Read the code comments for alternative uses.