


4 commonly used methods to crawl network data in PHP, 4 ways to crawl data in PHP_PHP Tutorial
Four commonly used methods of crawling network data in PHP, four methods of crawling data in PHP
The name of this section is fsockopen, curl and file_get_contents, specifically discussing these three methods Make some summaries of network data input and output. We have talked a lot about fsockopen before, let’s move on to others. Here is a brief list of some common methods of crawling network data.
1. Use file_get_contents to get the content in get mode:
$url = 'http://localhost/test2.php'; $html = file_get_contents($url); echo $html;
2. Use fopen to open the url and get the content via get
$url = 'http://localhost/test2.php'; $fp = fopen($url, 'r'); stream_get_meta_data($fp); $result = ''; while(!feof($fp)) { $result .= fgets($fp, 1024); } echo "url body: $result"; fclose($fp);
3. Use the file_get_contents function to get the url in post mode
$data = array( 'foo'=>'bar', 'baz'=>'boom', 'site'=>'www.jb51.net', 'name'=>'nowa magic'); $data = http_build_query($data); //$postdata = http_build_query($data); $options = array( 'http' => array( 'method' => 'POST', 'header' => 'Content-type:application/x-www-form-urlencoded', 'content' => $data //'timeout' => 60 * 60 // 超时时间(单位:s) ) ); $url = "http://localhost/test2.php"; $context = stream_context_create($options); $result = file_get_contents($url, false, $context); echo $result;
4. Use the curl library. Before using the curl library, you may need to check whether the curl extension has been turned on in php.ini
$url = 'http://localhost/test2.php?site=jb51.net'; $ch = curl_init(); $timeout = 5; curl_setopt ($ch, CURLOPT_URL, $url); curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1); curl_setopt ($ch, CURLOPT_CONNECTTIMEOUT, $timeout); $file_contents = curl_exec($ch); curl_close($ch); echo $file_contents;

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