Question

如何使用cURL和PHP从其他网站获取特定数据？这是我的代码：

$page = curl_init('http://lookup.cla.base8tech.com/');
$encoded ='';

foreach($_GET as $name=>$value){
    $encoded .= urlencode($name) .'=' .urlencode($value).'&';
}
foreach ($_POST as $name=>$value){
    $encoded .= urlencode($name) .'=' .urlencode($value).'&';
}
preg_match('!\d+!', $encoded, $zip);
print_r($zip);

$encoded = substr($encoded, 0, strlen($encoded)-1 );

curl_setopt($page, CURLOPT_POSTFIELDS, $encoded);
curl_setopt($page, CURLOPT_HEADER, 0);
curl_setopt($page, CURLOPT_POST, 1 );
curl_exec($page);
curl_close($page);

Answer 1

我发现代码中有一些错误。首先，要解决您的主要问题，您的cURL请求并未正确执行。要使用POST发送cURL请求并检索响应，请使用以下代码：

$ch = curl_init($url); // Set cURL url   

curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST"); // Send request via POST                                          
curl_setopt($ch, CURLOPT_POSTFIELDS, $data); // Set POST data                                     
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // curl_exec() returns response   
curl_setopt($ch, CURLOPT_HEADER, "Content-Type: application/x-www-form-urlencoded");  

$response = curl_exec($ch); // Return the request response
curl_close($ch);

此外，在您的代码中，您使用$encoded = substr($encoded, 0, strlen($encoded)-1 );。这不是必需的，只需执行$encoded = substr($encoded, 0, -1 );。

第三，您的正则表达式目前无效。您需要在字符串的开头和结尾添加/：preg_match('/!\d+!/', $encoded, $zip);

最后，您的foreach循环并非完全必要。您可以改为使用http_build_query功能：$encoded = http_build_query($_GET) . "&" . http_build_query($_POST);。这也使您的substr行毫无意义。

因此，您需要以下内容：

$encoded = "";

// Check to make sure the variables encoded are actually set
if(!empty($_POST) && !empty($_GET)) {
    $encoded = http_build_query($_GET) . "&" . http_build_query($_POST);
} elseif (empty($_POST) && !empty($_GET)) {
    $encoded = http_build_query($_GET);
} elseif (!empty($_POST) && empty($_GET)) {
    $encoded = http_build_query($_POST);
} else {
    $encoded = "";
}

$encoded = http_build_query($_GET) . "&" . http_build_query($_POST);

preg_match('/!\d+!/', $encoded, $zip);
print_r($zip);

$ch = curl_init("http://lookup.cla.base8tech.com/"); // Set cURL url   

curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "POST"); // Send request via POST                                          
curl_setopt($ch, CURLOPT_POSTFIELDS, $encoded); // Set POST data                                     
curl_setopt($ch, CURLOPT_RETURNTRANSFER, true); // curl_exec() returns response   
curl_setopt($ch, CURLOPT_HEADER, "Content-Type: application/x-www-form-urlencoded");  

$response = curl_exec($ch); // Return the request response
curl_close($ch);

如何从其他网站获取数据

1 个答案: