為什么PHP / Curl不保留會話的Cookie數據

Question

我正在使用Webbots，Spiders和Screen Scrapers（第二版）學習PHP Curl。 關於cookie身份驗證的章節顯示了以下代碼：

# Define target page 
$target = "http://www.WebbotsSpidersScreenScrapers.com/cookie_authentication/index.php";
# Define the login form data
$form_data="enter=Enter&username=webbot&password=sp1der3";
# Create the PHP/CURL session
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, $target); // Define target site
curl_setopt($ch, CURLOPT_RETURNTRANSFER, TRUE); // Return page in string
curl_setopt($ch, CURLOPT_COOKIEJAR, "cookies.txt"); // Tell PHP/CURL where to write cookies
curl_setopt($ch, CURLOPT_COOKIEFILE, "cookies.txt"); // Tell PHP/CURL which cookies to send
curl_setopt($ch, CURLOPT_POST, TRUE); 
curl_setopt($ch, CURLOPT_POSTFIELDS, $form_data);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, TRUE); // Follow redirects
# Execute the PHP/CURL session and echo the downloaded page
$page = curl_exec($ch);
echo $page; 
# Close the PHP/CURL session
curl_close($ch);

當我使用Web瀏覽器登錄測試網站時，會收到消息“您的登錄時間又可以保持3600秒”，並且每當我重新加載頁面時，我看到的時間就會減少（這是完全正常的行為，因為服務器可以識別會話號並處理所有相關事宜（包括之前的時間）。 現在，當我運行示例代碼（上面列出）時，每次運行腳本時，authenticate值都會不斷變化。 我的猜測是因為curl_setopt($ch, CURLOPT_COOKIEJAR, "cookies.txt"); 指令。 但是這里有一個想法：即使我注釋了這一行，但該行阻止了腳本更改cookie，該腳本仍會從服務器獲得“相同”響應（登錄仍然有效3600-3599秒）。 能以某種方式解決嗎？

Answer 1

您的問題是您沒有使用帶有curl的cookie會話。

嘗試像這樣設置cookie會話：

curl_setopt( $ch, CURLOPT_COOKIESESSION, true );

工作示例：

function getSessionTime($answer) {

    $parts      = explode('<font color="red">', $answer);
    $bottomPart = $parts[1];
    $parts      = explode('</font>', $bottomPart);
    $result     = $parts[0];

    return $result;
}

$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, 'http://www.WebbotsSpidersScreenScrapers.com/cookie_authentication/index.php');
curl_setopt($ch, CURLOPT_USERAGENT, 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/32.0.1700.107 Chrome/32.0.1700.107 Safari/537.36');
curl_setopt($ch, CURLOPT_POST, true);
curl_setopt($ch, CURLOPT_POSTFIELDS, "enter=Enter&username=webbot&password=sp1der3");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
curl_setopt($ch, CURLOPT_COOKIESESSION, true);
curl_setopt($ch, CURLOPT_COOKIEJAR, 'cookie-name'); //could be empty, but cause problems on some hosts
curl_setopt($ch, CURLOPT_COOKIEFILE, '/var/www/ip4.x/file/tmp'); //could be empty, but cause problems on some hosts

echo getSessionTime(curl_exec($ch));
sleep(1);
echo getSessionTime(curl_exec($ch));
sleep(1);
echo getSessionTime(curl_exec($ch));
sleep(1);
echo getSessionTime(curl_exec($ch));
sleep(1);
echo getSessionTime(curl_exec($ch));
sleep(1);
echo getSessionTime(curl_exec($ch));

輸出：

<br>
Your login is good for another 3600 seconds
<br>
Your login is good for another 3599 seconds
<br>
Your login is good for another 3597 seconds
<br>
Your login is good for another 3596 seconds
<br>
Your login is good for another 3595 seconds
<br>
Your login is good for another 3594 seconds