[英]How to scrape dynamic data with PHP Simple HTML DOM Parser
首先,我要說的是,我在這里閱讀了許多“報廢”線程,但對我沒有幫助。 我也檢查了幾天的互聯網,現在我已經接近電線,希望有人可以幫我一下。
我正在使用PHP Simple HTML DOM解析器從頁面中抓取一些數據。 我正在使用的url提供動態內容,但似乎無法進行任何操作來提取該內容。我需要從<tr id="0" class="ui-widget-content jqgrow ui-row-ltr" role="row">
到<tr id="9" class="ui-widget-content jqgrow ui-row-ltr" role="row">
,我覺得一旦獲得工作,我可以得到其他人。 因為在加載頁面時此信息實際上不在頁面上,而是在頁面加載后進入折疊狀態,所以我很不高興。
話雖如此,這是我嘗試過的:
echo file_get_html('http://sheriffclevelandcounty.com/p2c/jailinmates.aspx')->plaintext;
上面的內容將向我展示所有需要的信息,例如:
我還嘗試了使用IMDb插件中的示例,並根據需要進行了修改,就是這樣:
// Defining the basic cURL function
function curl($url) {
// Assigning cURL options to an array
$options = Array(
CURLOPT_RETURNTRANSFER => TRUE, // Setting cURL's option to return the webpage data
CURLOPT_FOLLOWLOCATION => TRUE, // Setting cURL to follow 'location' HTTP headers
CURLOPT_AUTOREFERER => TRUE, // Automatically set the referer where following 'location' HTTP headers
CURLOPT_CONNECTTIMEOUT => 120, // Setting the amount of time (in seconds) before the request times out
CURLOPT_TIMEOUT => 120, // Setting the maximum amount of time for cURL to execute queries
CURLOPT_MAXREDIRS => 10, // Setting the maximum number of redirections to follow
CURLOPT_USERAGENT => "Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1a2pre) Gecko/2008073000 Shredder/3.0a2pre ThunderBrowse/3.2.1.8", // Setting the useragent
CURLOPT_URL => $url, // Setting cURL's URL option with the $url variable passed into the function
);
$ch = curl_init(); // Initialising cURL
curl_setopt_array($ch, $options); // Setting cURL's options using the previously assigned array data in $options
$data = curl_exec($ch); // Executing the cURL request and assigning the returned data to the $data variable
curl_close($ch); // Closing cURL
return $data; // Returning the data from the function
}
// Defining the basic scraping function
function scrape_between($data, $start, $end){
$data = stristr($data, $start); // Stripping all data from before $start
$data = substr($data, strlen($start)); // Stripping $start
$stop = stripos($data, $end); // Getting the position of the $end of the data to scrape
$data = substr($data, 0, $stop); // Stripping all data from after and including the $end of the data to scrape
return $data; // Returning the scraped data from the function
}
$scraped_page = curl("http://sheriffclevelandcounty.com/p2c/jailinmates.aspx"); // Downloading IMDB home page to variable $scraped_page
$scraped_data = scrape_between($scraped_page, '<table id="tblII" class="ui-jqgrid-btable" cellspacing="0" cellpadding="0" border="0" role="grid" aria-multiselectable="false" aria-labelledby="gbox_tblII" style="width: 456px;">', '</table>'); // Scraping downloaded dara in $scraped_page for content between <title> and </title> tags
echo $scraped_data; // Echoing $scraped data, should show "The Internet Movie Database (IMDb)"
當然,這些都不起作用,所以我的問題是:如何使用PHP Simple DOM分析器獲取頁面加載后加載的動態內容? 有可能還是我完全走錯了路?
我了解您需要jqgrid中提供的動態數據。 為此,您可以使用發布網址,以提供數據。
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL, "http://sheriffclevelandcounty.com/p2c/jqHandler.ashx?op=s");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch,CURLOPT_POST, 1);
curl_setopt($ch,CURLOPT_POSTFIELDS, array(
'rows'=>10000, //Here you can specify how many records you want
't'=>'ii'
));
$output = curl_exec($ch);
curl_close($ch);
echo "<pre>";
print_r(json_decode($output));
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