Change excerpt length according to the title length

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In WordPress is it possible to change the excerpt length depending on how long the title is?

I simply call the title like so:

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<?php the_title(); ?>

And the excerpt: 

 <?php html5wp_excerpt('html5wp_index'); // in my functions.php I set the length ?>

functions.php 

function html5wp_index($length);
{
    return 25;

}

So if the title was 15 characters then the excerpt would only be 10 for example?

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1 comment

  1. This should do the trick for you. Just place it in your functions.php file. Currently it would affect all posts or pages where the_excerpt(); is being used, but you could wrap it in a conditional to isolate it. Just read the comments in the code for some further explanation of what’s happening.

    <?php

function aw_new_excerpt_length($length) {

    // get the post title and find its string length
    $str = get_the_title();
    $titleLength = strlen($str);

    // check if length is longer that 10 characters
    // and return an excerpt length for more or 
    // less than 10
    if($titleLength > 10) {
    return 5;
    } else {
        return 3;
    }
}

// then add the filter to change the excerpt length
add_filter('excerpt_length', 'aw_new_excerpt_length');

?>

    Just change the numbers to set it to your specification.