仅显示最后一个结果

我希望在多个网站上搜索单个数据。数据正在正确拉取，但它仅针对最后一个搜索案例显示。单个搜索工作正常。

例如，我进行了三次搜索，仅显示第三个结果 - 其余结果为空白。

谁能说出一些启示？

if($_POST)
{
$domains = explode("'n", $_POST[domains]);
foreach($domains as $domain)
{
$domain = explode('|', $domain);
$domain = str_replace(array('http://','/'),'',$domain[0]);
echo '<b>Providing Data for '. $domain .'.. </br></br>';

unset($urls);
unset($url);
unset($blacklinka[1]);
unset($blacklinka);
unset($AskApache_result);
unset($regex);
$domainshort = str_replace('www.','',$domain);
$domainshortdash = str_replace('.','-',$domainshort);

$urls[] = 'http://data.alexa.com/data?cli=10&dat=snbamz&url=' . $domain;


$ch = curl_init();
    foreach($urls as $url)
{
curl_setopt ($ch, CURLOPT_URL, $url);
    curl_setopt ($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US;     rv:1.8.1.6) Gecko/20070725 Firefox/2.0.0.6");
    curl_setopt ($ch, CURLOPT_TIMEOUT, 60);
    curl_setopt ($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt ($ch, CURLOPT_REFERER, 'http://www.google.com/');
    $AskApache_result = curl_exec ($ch);

$regex = '/LINKSIN NUM="(.+?)"/';
preg_match($regex,$AskApache_result,$blacklinka);
echo '</br>';
echo 'Indexed Backlinks: '. $blacklinka[1];
    echo '</br></br>';

    flush();
    ob_flush();
}
}
}