String Wrapping

<?php
function wrapper($stringText, $width){
    $arrayText = explode("\n", $stringText);
    foreach($arrayText as $temp){
        $tempArray[] = explode(" ", $temp);
    }

    var_dump($tempArray);

    $output = "";

    foreach($tempArray as $wordArray){
        $tempString = "";
        $tempOutput = "";

        foreach($wordArray as $word){
            if(strlen($tempString." ".$word) >= $width){
                if(substr($tempString, -1) != "\n"){
                    $tempString .= "\n";
                }
                $tempOutput .= $tempString;
                $tempString = $word;
            }else{
                if($tempString == ''){
                    $tempString = $word;
                }else{
                    $tempString .= " ".$word;
                }
            }
        }

        $output .= $tempOutput.$tempString;
    }

    return $output;
}

$string = <<<END
here's some text
I hope you enjoy it there shouldn't be too many problems with it
but if there is don't come winging
END;

echo wrapper($string, 20);
?>