Question

我第一次尝试在PHP中使用Curl，原因是我想从此页面中搜索结果：http://www.lldj.com/pastresult.php。该网站自2002年以来每周发布一次乐透结果，并有一个简单的提交表单（日期）。

提交按钮：名称=按钮/值=提交选择下拉列表：Name = Draw＆amp;选项＃（1 - 1097）//代表抽奖号

我可以手动检查它，但我想为什么我不使用简单的脚本并使其更容易，因为我也有兴趣测试如何使用PHP / CURL提交数据并检索结果。

我使用DOM PHP进行抓取，我很乐意使用语法。我想知道我是否应该一起使用Curl和DOM，或者这可以通过CURL来实现。

到目前为止我所拥有的;

include'dom.php';
$post_data['draw'] = '1097';
$post_data['button'] = 'Submit';

//traverse array and prepare data for posting (key1=value1)
foreach ( $post_data as $key => $value) {
$post_items[] = $key . '=' . $value;
}

//create the final string to be posted using implode()
$post_string = implode ('&', $post_items);

//create cURL connection
$curl_connection = 
curl_init('http://www.lldj.com/pastresult.php');

//set options
curl_setopt($curl_connection, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($curl_connection, CURLOPT_USERAGENT, 
curl_setopt($curl_connection, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl_connection, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl_connection, CURLOPT_FOLLOWLOCATION, 1);
//set data to be posted
curl_setopt($curl_connection, CURLOPT_POSTFIELDS, $post_string);

 //perform our request
$result = curl_exec($curl_connection);

 //show information regarding the request
 print_r(curl_getinfo($curl_connection));
echo curl_errno($curl_connection) . '-' . 
            curl_error($curl_connection);

提交数据/抓取后

$t = $curl_connection->find('table',0); // ?? usualy referes to file_get_content Var
$data = $t->find('tr');

foreach($data as $n) {
$tds = $n->find('td');

$dataRows = array();

$dataRows['num'] =  $tds[0]->find('img',0)->href;

var_dump($dataRows);
}

有人可以指出这是否正确？如何设置为自动增加提交值然后重复该过程（例如，提交darw = 1然后draw = 2等。）感谢

Answer 1

<?php   
  while(true){

   for($i=1;$i<5000;$i++){

$post_data['draw'] = $i; // will change every time like 1,2,3,4
$post_data['button'] = 'Submit';

//traverse array and prepare data for posting (key1=value1)
foreach ( $post_data as $key => $value) {
$post_items[] = $key . '=' . $value;
}

//create the final string to be posted using implode()
$post_string = implode ('&', $post_items);

//create cURL connection
$curl_connection = 
curl_init('http://www.lldj.com/pastresult.php');

//set options
curl_setopt($curl_connection, CURLOPT_CONNECTTIMEOUT, 30);
curl_setopt($curl_connection, CURLOPT_USERAGENT, 
curl_setopt($curl_connection, CURLOPT_RETURNTRANSFER, true);
curl_setopt($curl_connection, CURLOPT_SSL_VERIFYPEER, false);
curl_setopt($curl_connection, CURLOPT_FOLLOWLOCATION, 1);
//set data to be posted
curl_setopt($curl_connection, CURLOPT_POSTFIELDS, $post_string);

 //perform our request
$result = curl_exec($curl_connection);

 //show information regarding the request
 print_r(curl_getinfo($curl_connection));
echo curl_errno($curl_connection) . '-' . 
            curl_error($curl_connection);

//开始废料

$t = $curl_connection->find('table',0); // ?? usualy referes to file_get_content Var
$data = $t->find('tr');

foreach($data as $n) {
$tds = $n->find('td');

$dataRows = array();

$dataRows['num'] =  $tds[0]->find('img',0)->href;

var_dump($dataRows);
}

} for loop end here

}?>

这里只是通过改变id连续使用curl的骨架，你可以按自己的方式设置它。

请确保在获取数据后清除变量。

使用

...
curl_close($ch);
unset($fields_string);
...

Answer 2

加载页面

获取远程内容的首选方式是file_get_contents()。使用：

$html = file_get_contents('http://www.lldj.com/pastresult.php');

多数民众赞成的。

从页面获取内容

要从页面获取内容，您通常会使用DOMDocument和DOMXPath：

$doc = new DOMDocument();
@$doc->loadHTML($html);
$selector = new DOMXpath($doc);

// xpath query
$result = $selector->query('YOUR QUERY');

如何使用Curl提交和检索数据？

2 个答案: