Multiple excerpt lengths in wordpress

Add this to your functions.php file:

function my_excerpt_length() {
 global $myExcerptLength;
 
if ($myExcerptLength) {
     return $myExcerptLength;
 } else {
     return 80; //default value
     }
 }
 add_filter('excerpt_length', 'my_excerpt_length');
 

And then, before calling the excerpt within the loop, you specify a value for $myExcerptLength (don’t forget to set it back to 0 if you want to have the default value for the rest of your posts):

<?php
     $myExcerptLength=35;
     echo get_the_excerpt();
     $myExcerptLength=0;
 ?>