Preventing php_network_getaddresses: getaddrinfo failed: - php

Question

I am trying to call an URL with PHP to check if it exists and is reachable.
My initial code was
fopen('http://'.$this -> url, 'r');
But it throws the following errors every time an URL is unreachable:
fopen(http://dwzegdzgwedzgew.com): failed to open stream: php_network_getaddresses: getaddrinfo failed
php_network_getaddresses: getaddrinfo failed:
The error operator (#) is ignored in this case as the error isn't thrown by fopen itself but while resolving the asdress. So I thought that should do it:
#fopen(#'http://'.$this -> url, 'r');
but it also goes on throwing the error.
Is there a non-error-throwing possibility to check if an URL exists within PHP before opening it?

Answer 1

What is the error message with $ressource = #fopen('http://' . $this->url, 'r'); ?
<?php
$urls = array('kihgkighuhgkig.li', 'google.com', 'adsfafdf.fr');
foreach ($urls as $url)
{
if (gethostbyname($url) != $url)
{
$ressource = fopen('http://' . $url, 'r');
var_dump($url, $ressource);
}
}
The output is :
$> php test.php
string(10) "google.com"
resource(6) of type (stream)