判断URL是否存在

我没测试,看到别人用CURL写的,转一下先,有空测试一下

function url_exists($url) {
    $handle  = curl_init($url);
    if (false === $handle)
    {
        return false;
    }
    curl_setopt($handle, CURLOPT_HEADER, false);
    curl_setopt($handle, CURLOPT_FAILONERROR, true);  // this works
    curl_setopt($handle, CURLOPT_HTTPHEADER, Array("User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.15) Gecko/20080623 Firefox/2.0.0.15") ); // request as if Firefox
    curl_setopt($handle, CURLOPT_NOBODY, true);
    curl_setopt($handle, CURLOPT_RETURNTRANSFER, false);
    $connectable = curl_exec($handle);
    curl_close($handle); 
    return $connectable;
}

//判断布尔值 验证结果显示 bool(true) bool(false)
$uri='http://www.rsywx.net/jquery/demos/index.html';
var_dump(url_exists($uri)); //true
$uri='http://www.rsywx.net/jquery/demos/index1.html';
var_dump(url_exists($uri)); //false