PHP handle errors

Question

Using this code with simplehtmldom script (http://simplehtmldom.sourceforge.net/manual.htm):

function file_get_html() {
    $dom = new simple_html_dom;
    $         


        

Answer 1

Hi You need to check for the 404 Not Found message as there is returned an array in any case.

function url_exists($url){
if ((strpos($url, "http")) === false) $url = "http://" . $url;
$headers = @get_headers($url);
//print_r($headers);
if (is_array($headers)){
    //Check for http error here....should add checks for other errors too...
    if(strpos($headers[0], '404 Not Found'))
        return false;
    else
        return true;    
}         
else
    return false;
}

Answer 2

Try putting try-catch like this in your function:

try{
    $dom->load(call_user_func_array('file_get_contents', $args), true);
    return $dom;
}
catch(Exception $e){
  //echo $e->getMessage();
  throw new Exception('could not load the url');
}

Update:

Or you can use this function to see if the remote link really exists:

function url_exists($url){
    if ((strpos($url, "http")) === false) $url = "http://" . $url;
    if (is_array(@get_headers($url)))
         return true;
    else
         return false;
}

Here is how you can use above function:

function file_get_html() {
    $args = func_get_args();

    if (url_exists($args)) {
      $dom = new simple_html_dom;
      $dom->load(call_user_func_array('file_get_contents', $args), true);
      return $dom;
    }
    else {
      echo "The url isn't valid";
      return false;
    }
}