An alternative splitting algorithm for https://github.com/JJJ/publishiza

Jorbishiza.php

<?php
/*
Plugin Name: Jorbishiza 
*/

add_filter( 'publishiza_format_post_content_for_twitter', 'jorbishiza_format_post_content_for_twitter', 10, 3); 

function jorbishiza_format_post_content_for_twitter( $tweets, $text, $length ){
    $tweets = array();

    $decoded  = html_entity_decode( $text, ENT_QUOTES, 'UTF-8' );
    $stripped = wp_strip_all_tags( $decoded, true );
    
    // Let's try to split by fragments 
    $fragments = preg_split( '/(?<=[\!\?,\.]\s)/', $stripped );  

    $fragmentsRemaining = count( $fragments );
    $currentFragment = 0;
    $caryover = ''; 
    while( $fragmentsRemaining > 0 ) { 
        while( empty( trim( $fragments[ $currentFragment ] ) ) ) { 
            $currentFragment++;
            $fragmentsRemaining--;
        }   
        $newTweet = ''; 
        if ( $caryover ) { 
            $newTweet = $caryover;
            $caryover = ''; 
            $potentialFragment = trim( $fragments[ $currentFragment ] );
            if ( strlen( $newTweet) + strlen( $potentialFragment ) <= $length ){
                $newTweet .= ' ' . $potentialFragment;
                $currentFragment++;
                $fragmentsRemaining--;
            }    
        } else {
            $newTweet = trim( $fragments[ $currentFragment ] );
            $fragmentsRemaining--;
            $currentFragment++;
        }   

        if ( strlen( $newTweet ) > $length ){
            // it's already too long
            $split =  wordwrap( $newTweet, $length, "\n", false );
            $trimmed = array_map( 'trim', explode( "\n", $split ) );
            $tmptweets  = array_filter( $trimmed );
            $caryover = array_pop( $tmptweets );
            foreach ($tmptweets as &$value) {
                    $value = trim( $value . html_entity_decode( '&hellip;', 0, 'UTF-8' ) );
            }   
            unset($value);
            $tweets = array_merge( $tweets, $tmptweets );
        } else {
            $endloop = false;
            while ( false === $endloop ){
                $potentialFragment = trim( $fragments[ $currentFragment ] );
                if ( strlen( $newTweet) + strlen( $potentialFragment ) <= $length ){
                    $newTweet .= ' ' . $potentialFragment;
                    $currentFragment++;
                    $fragmentsRemaining--;
                } else {
                    $endloop = true;
                }   
            }   
            $tweets[] = trim( $newTweet );
        }   
    }   

    return $tweets;
}

add_filter( 'publishiza_storm_ellipsis', '__return_false' );