curl訪問https

function curlPost($url, $data = array(), $timeout = 30, $CA = true){    
	$useragent = 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/66.0.3359.170 Safari/537.36';
    $cacert = getcwd() . '/cacert.pem'; //CA根證書  
    $SSL = substr($url, 0, 8) == "https://" ? true : false;  
      
    $ch = curl_init();  
    curl_setopt($ch, CURLOPT_URL, $url);  
    curl_setopt($ch, CURLOPT_TIMEOUT, $timeout);  
    curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, $timeout-2);  
    if ($SSL && $CA) {  
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);   // 只信任CA頒佈的證書  
        curl_setopt($ch, CURLOPT_CAINFO, $cacert); // CA根證書（用來驗證的網站證書是否是CA頒佈）  
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2); // 檢查證書中是否設置域名，並且是否與提供的主機名匹配  
    } else if ($SSL && !$CA) {  
        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false); // 信任任何證書  
        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 1); // 檢查證書中是否設置域名  
    }  
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);  
    curl_setopt($ch, CURLOPT_HTTPHEADER, array('Expect:')); //避免data數據過長問題  
    curl_setopt($ch, CURLOPT_POST, true);  
    curl_setopt($ch, CURLOPT_POSTFIELDS, $data);  
	curl_setopt($ch, CURLOPT_HTTPHEADER, array(
    'Content-Type: application/json',
    'Content-Length: ' . strlen($data)
	));
	curl_setopt($ch, CURLOPT_USERAGENT, $useragent);
	curl_setopt($ch, CURLOPT_REFERER, 'http://www.google.com/');
    $ret = curl_exec($ch);  
    curl_close($ch);  
    return $ret;    
}