function ping3 ($ping)
{
$comm = "ping -c3 ".$ping;
$output=shell_exec($comm);
echo $output;
}
 
ping3 ("www.dominio.com");
?> 

function get_web_page( $url )
{
	$options = array(
		CURLOPT_RETURNTRANSFER => true,     // return web page
		CURLOPT_HEADER         => false,    // don't return headers
		CURLOPT_FOLLOWLOCATION => true,     // follow redirects
		CURLOPT_ENCODING       => "",       // handle compressed
		CURLOPT_USERAGENT      => "spider", // who am i
		CURLOPT_AUTOREFERER    => true,     // set referer on redirect
		CURLOPT_CONNECTTIMEOUT => 120,      // timeout on connect
		CURLOPT_TIMEOUT        => 120,      // timeout on response
		CURLOPT_MAXREDIRS      => 10,       // stop after 10 redirects
	);
 
	$ch      = curl_init( $url );
	curl_setopt_array( $ch, $options );
	$content = curl_exec( $ch );
	$err     = curl_errno( $ch );
	$errmsg  = curl_error( $ch );
	$header  = curl_getinfo( $ch );
	curl_close( $ch );
 
	$header['errno']   = $err;
	$header['errmsg']  = $errmsg;
	$header['content'] = $content;
	return $header;
}

<?php
 
// Function to check response time
function pingDomain($domain){
    $starttime = microtime(true);
    $file      = fsockopen ($domain, 80, $errno, $errstr, 10);
    $stoptime  = microtime(true);
    $status    = 0;
 
    if (!$file) $status = -1;  // Site is down
    else {
        fclose($file);
        $status = ($stoptime - $starttime) * 1000;
        $status = floor($status);
    }
    return $status;
}
?>