Prevent the post of long strings from comment user

<?php
function prevent_long_strings($post, $limit = 3) {
    $word_array = explode(" ", $post);
    $opti_string = "";
    foreach ($word_array as $val) {
        if (preg_match("/(.)\\1{".$limit.",}/", $val)) {
            $char_array = preg_split("//", $val);
            $check = 0;
            for ($i = 0; $i < count($char_array); $i++) {
                if ($char_array[$i] == $char_array[$i-1]) {
                    if ($check < $limit - 1) {
                        $new_word[] = $char_array[$i];
                    }
                    $check++;
                } else {
                    $new_word[] = $char_array[$i];
                    $check = 0;
                }
            }
            $opti_string .= implode("", $new_word)." ";
            unset($new_word);
        } else {
            $opti_string .= $val." ";
        }
    }
    return $opti_string;
}
// Example:
echo prevent_long_strings("Hello, can you heeeeeeeeaaaaaaaar meeeeeeeeeeeee !!!!!!!!!!!!!!!!!!! !!!!!!!!", 3);
// is converted to "Hello, can you heeeaaar meee !!! !!!"
?>