How to detect a url in a text and convert it to a href

This function is failing to check if there is a url in the text to add a href and so if the user clicks there, redirect it

function url($text)
{   
    $text=html_entity_decode($text);
    $text=" ".$text;
    $text=preg_replace('/(http(0,1):\/\/[\w\-\.\/#?&=]*)/','<a href="$1" target="_blank">$1</a>',$text);
    return $text;
}


<div class="publi-contenido">
    <p><?php echo $posts['contenido']; ?></p>

static function agregar($CodUsua, $contenido, $img,$categoria)
{
    $textf=url($contenido);
    $con = conexion("root", "");
    $consulta = $con->prepare("insert into post(CodPost, CodUsua, contenido, img,categoria) values(null, :CodUsua, :contenido, :img, :categoria)");
    $consulta->execute(array(':CodUsua' => $CodUsua,
                             ':contenido' => $textf,
                             ':img' => $img,
                             ':categoria' => $categoria));
}