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Four commonly used methods of crawling network data in PHP, four methods of crawling data in PHP
Home Backend Development PHP Tutorial 4 commonly used methods to crawl network data in PHP, 4 ways to crawl data in PHP_PHP Tutorial

4 commonly used methods to crawl network data in PHP, 4 ways to crawl data in PHP_PHP Tutorial

Jul 13, 2016 am 09:51 AM
php crawl network data

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;
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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);
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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;

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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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