curl模拟提交，绕过验证

function getPage ($url) {$useragent = 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/44.0.2403.89 Safari/537.36';$timeout= 120;$dir            = dirname(__FILE__);$cookie_file    = $dir . '/cookies/' . md5($_SERVER['REMOTE_ADDR']) . '.txt';$ch = curl_init($url);curl_setopt($ch, CURLOPT_FAILONERROR, true);curl_setopt($ch, CURLOPT_HEADER, 0);curl_setopt($ch, CURLOPT_COOKIEFILE, $cookie_file);curl_setopt($ch, CURLOPT_COOKIEJAR, $cookie_file);curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true );curl_setopt($ch, CURLOPT_ENCODING, "" );curl_setopt($ch, CURLOPT_RETURNTRANSFER, true );curl_setopt($ch, CURLOPT_AUTOREFERER, true );curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout );curl_setopt($ch, CURLOPT_TIMEOUT, $timeout );curl_setopt($ch, CURLOPT_MAXREDIRS, 10 );curl_setopt($ch, CURLOPT_USERAGENT, $useragent);curl_setopt($ch, CURLOPT_REFERER, 'http://www.google.com/');$content = curl_exec($ch);if(curl_errno($ch)){    echo 'error:' . curl_error($ch);}else{    return $content;        }    curl_close($ch);}