Some micro-optimizations

program/lib/Roundcube/rcube_base_replacer.php

@@ -90,8 +90,8 @@ class rcube_base_replacer
 
             if (preg_match_all('/\.\.\//', $path, $matches, PREG_SET_ORDER)) {
                 foreach ($matches as $a_match) {
-                    if (strrpos($base_url, '/')) {
-                        $base_url = substr($base_url, 0, strrpos($base_url, '/'));
+                    if ($pos = strrpos($base_url, '/')) {
+                        $base_url = substr($base_url, 0, $pos);
                     }
                     $path = substr($path, 3);
                 }

program/lib/Roundcube/rcube_html2text.php

@@ -611,11 +611,13 @@ class rcube_html2text
                     $body = preg_replace_callback('/((?:^|\n)>*)([^\n]*)/', array($this, 'blockquote_citation_ballback'), trim($body));
                     $body = '<pre>' . htmlspecialchars($body) . '</pre>';
 
-                    $text = substr($text, 0, $start) . $body . "\n" . substr($text, $end + 13);
+                    $text = substr_replace($text, $body . "\n", $start, $end + 13 - $start);
                     $offset = 0;
+
                     break;
                 }
-            } while ($end || $next);
+            }
+            while ($end || $next);
         }
     }
 
@@ -624,8 +626,9 @@ class rcube_html2text
      */
     public function blockquote_citation_ballback($m)
     {
-        $line = ltrim($m[2]);
+        $line  = ltrim($m[2]);
         $space = $line[0] == '>' ? '' : ' ';
+
         return $m[1] . '>' . $space . $line;
     }
 

program/lib/Roundcube/rcube_utils.php

@@ -454,8 +454,8 @@ class rcube_utils
 
         // cut out all contents between { and }
         while (($pos = strpos($source, '{', $last_pos)) && ($pos2 = strpos($source, '}', $pos))) {
-            $styles = substr($source, $pos+1, $pos2-($pos+1));
-            $length = strlen($styles);
+            $length = $pos2 - $pos - 1;
+            $styles = substr($source, $pos+1, $length);
 
             // check every line of a style block...
             if ($allow_remote) {