Creer un texte d'intro d'un paragraphe.

truncate.php

<?php 
    function truncate($string, $max_length = 50, $replacement = '...', $trunc_at_space = false) {
        $max_length -= strlen($replacement);
        $string_length = strlen($string);
        
        if($string_length <= $max_length)
            return $string;
        
        if( $trunc_at_space && ($space_position = strrpos($string, ' ', $max_length-$string_length)) )
            $max_length = $space_position;
        
        return substr_replace($string, $replacement, $max_length);
    }