function to change text to sentence case

hi, i have the following code:

function sentence_case($string) {
    $sentences = preg_split('/([.?!\r\n]+)/', $string, -1, PREG_SPLIT_NO_EMPTY|PREG_SPLIT_DELIM_CAPTURE);
    $new_string = '';
    foreach ($sentences as $key => $sentence) {
        $new_string .= ($key & 1) == 0?
            ucfirst(strtolower(trim($sentence))) :
            $sentence.' ';
    }
    return trim($new_string);
}

PHP:

the above works fine but the issue is with text on new lines. a space is inserted in front of the first word. is it possible to remove this space? thanks

 

function sentence_case($string) {
    $sentences = preg_split('/([.?!\r\n]+)/', $string, -1, PREG_SPLIT_NO_EMPTY|PREG_SPLIT_DELIM_CAPTURE);
    $new_string = '';

    foreach ($sentences as $key => $sentence)
    {
        $new_string .= ($key % 2 == 0)?
            ucfirst(strtolower(trim($sentence))) :
            $sentence;
    }
    return trim($new_string);
}

PHP:

 

hmmm, now that removes all spaces after punctuation... which again is not what's needed. i think it's very close close, any ideas? cheers

 

You are right, a little correction:

function sentence_case($string) {
    $sentences = preg_split('/([.?!\s]+)/', $string, -1, PREG_SPLIT_NO_EMPTY|PREG_SPLIT_DELIM_CAPTURE);
    $new_string = '';

    foreach ($sentences as $key => $sentence)
    {
        $new_string .= ($key % 2 == 0)?
            ucfirst(strtolower(trim($sentence))) :
            $sentence;
    }
    return trim($new_string);
}

PHP:

 

now that just seems to be doing a ucwords on the text?