Strip shortcodes when making excerpts. Props hailin. fixes #7100

git-svn-id: http://svn.automattic.com/wordpress/trunk@8054 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/formatting.php

@@ -839,6 +839,9 @@ function human_time_diff( $from, $to = '' ) {
 function wp_trim_excerpt($text) { // Fakes an excerpt if needed
 	if ( '' == $text ) {
 		$text = get_the_content('');
+		
+		$text = strip_shortcodes( $text ); 
+		
 		$text = apply_filters('the_content', $text);
 		$text = str_replace(']]>', ']]>', $text);
 		$text = strip_tags($text);

wp-includes/shortcodes.php

@@ -134,6 +134,23 @@ function shortcode_atts($pairs, $atts) {
 	return $out;
 }
 
+/* 
+ * stip all the shortcodes from a post's content 
+ * returns the content without shortcodes
+ */
+function strip_shortcodes( $content ) { 
+	
+	global $shortcode_tags;
+
+	if (empty($shortcode_tags) || !is_array($shortcode_tags))
+		return $content;
+
+	$pattern = get_shortcode_regex();
+
+	return preg_replace('/'.$pattern.'/s', '', $content);
+	
+}
+
 add_filter('the_content', 'do_shortcode', 11); // AFTER wpautop() 
 
 ?>