-function enc_image_src($str) {
- list($src, $width, $height, $a, $b, $c) = explode(' ', $str);
- return $src;
-}
-
-function enc_image_width($str) {
- list($src, $width, $height, $a, $b, $c) = explode(' ', $str);
- return $width;
-}
-
-function enc_image_height($str) {
- list($src, $width, $height, $a, $b, $c) = explode(' ', $str);
- return $height;
-}
-
-function enc_thumb_src($str) {
- list($a, $b, $c, $src, $width, $height) = explode(' ', $str);
- return $src;
-}
-
-function enc_thumb_width($str) {
- list($a, $b, $c, $src, $width, $height) = explode(' ', $str);
- return $width;
-}
-function enc_thumb_height($str) {
- list($a, $b, $c, $src, $width, $height) = explode(' ', $str);
- return $height;
-}
+function wfpl_nth_word($str, $n) {
+ $a = explode(' ', $str);
+ return isset($a[$n]) ? $a[$n] : null;
+}
+
+# encoding is a space separated list of:
+# image_filename width height thumb_filename thumb_width thumb_height
+function enc_image_src($str) { return wfpl_nth_word($str, 0); }
+function enc_image_width($str) { return wfpl_nth_word($str, 1); }
+function enc_image_height($str) { return wfpl_nth_word($str, 2); }
+function enc_thumb_src($str) { return wfpl_nth_word($str, 3); }
+function enc_thumb_width($str) { return wfpl_nth_word($str, 4); }
+function enc_thumb_height($str) { return wfpl_nth_word($str, 5); }