检查loadHTMLFile url是否存在，如果它有div，如果没有，则不执行任何操作

Question

I am trying to detect a couple things from a url.

1. is it valid

2. does it have a specific div in it

   $url = 'http://www.google.com/aasdsasdfafddsgsagf';
   $dom = new DOMDocument;
   libxml_use_internal_errors(true);
   $request = $dom->loadHTMLFile($url);
   $DOMxpath = new DOMXPath($dom);
   
   $title = $DOMxpath->query("//span[@class='bluebar']")
   
   if(!$request || $title->length == 0){
       echo 'failed!!';
   }
   

I am trying to get this conditions:

if the page loads and it does not have the div - do nothing.

if the page does not load - do nothing.

Right now I am getting this error which stops everything that comes after it from running properly.

error:

Warning: DOMDocument::loadHTMLFile(http://www.google.com/aasdsasdfafddsgsagf): failed to open stream: HTTP request failed! HTTP/1.0 404 Not Found in...

I still get the echo 'failed!!'.

Please help!!

Answer 1

If I understand your question correctly, your problem can be solved by suppressing the warning. This can be done by affixing $dom->loadHTMLFile($url) with the Error Control Operator @.

$request = @$dom->loadHTMLFile($url);

In the example there is missing a semicolon after setting $title. That causes a PHP Parse error. This code will do what you want:

$url = 'http://www.google.com/aasdsasdfafddsgsagf';
$dom = new DOMDocument;
libxml_use_internal_errors(true);
$request = $dom->loadHTMLFile($url); // $request === false
$DOMxpath = new DOMXPath($dom);

$title = $DOMxpath->query("//span[@class='bluebar']");

if(!$request || $title->length == 0){
    echo 'failed!!';
}