how can I put a condition in if so that it does not happen if the array has "..." at the end of the sentence

You can use PHP's substr function by simply entering a negative number.

Checks the size of the string variable and verifies that the last three characters of the string variable are not the three points.

if (strlen($string) > $size && substr($string,-3) !== '...')

A note to be made is that in the example above, it will check if the size of the variable string is greater than the value entered in the variable $size , if it is the condition it will check if the variable string does not contain the three points at the end, returning true (that does not contain the three points) it will limit the variable string , if it contains it will not limit.

See working at ideone

I believe this should work:

$prod->setNome(Utility::limitaString($prod->getNome(), 30));

    public static function limitaString ($string, $size = 50) {
    if (strlen($string) > $size) {
        $string = substr($string, 0, $size);
        for ($i=$size; $i>=0; $i--) {
            $limiters = array(" ", "\n", "\t");
            if (in_array($string[$i], $limiters)) {
                if ($string[$i-1] == "\r")
                $i = $i-1;
                $string = substr($string, 0, $i);
                if( strstr($string,"...")){
                    //return null
                }else{
                    $string .= "...";
                }
                return $string;
            }
        }
        if( strstr($string,"...")){
             //return null
        }else{
             $string .= "...";
        }
    }
    return $string;
}

Note: I have not tested.

I do not quite understand the array, but I'll do as I understand:

preg_match(".{3}$", $string, $ultimos3);
if ($ultimos3[0] != "..." && strlen($string) > $size)

See working at Ideone .

What I did:

On the first line, I used a regular expression ( regex tag ) to get the last 3 characters.

On the second, it's the same as% w_that you were using, but now it checks to see if the regex returned if .

References:

• Function preg_match in official php documentation.

Try this:

if (!stripos($string, "...") {
   //se ela achar as retiscencias ela não executa
   //seu codigo AQUI
}

What it will do is, look at its string variable if there is anywhere the text "...", if it does not find it, it will execute its code. It searches all $string ignoring the position, seeking only to find what was requested. I think this can solve your problem.

Link for the PHP function. Good luck!