A simple example of using the php curl_setopt() function to capture web pages and POST data

The previous article explained to you the concept of the curl_setopt function in PHP. It is an extension library of PHP. Using the curl_setopt() function can easily and quickly crawl web pages (can be used for collection) , using it needs to be configured and enabled in php.ini.

extension=php_curl.dll

Now you can use the php curl_setopt function, so let’s look at the first usage first:

1. A crawled web page A simple case:

The code is as follows:

<?php

// 创建一个新cURL资源  
$ch = curl_init();

// 设置URL和相应的选项  
curl_setopt($ch, CURLOPT_URL, "http://www.php.cn/");
curl_setopt($ch, CURLOPT_HEADER, false);

// 抓取URL并把它传递给浏览器  
curl_exec($ch);

//关闭cURL资源，并且释放系统资源  
curl_close($ch); 
?>

The above example code captures a domain name of http://www.php. cn/ web page, the code execution result is as follows:

##2. POST data case:

When using curl, there will often be data interaction, so it is more important.

 <?php  
     $ch = curl_init();  
     /*在这里需要注意的是，要提交的数据不能是二维数组或者更高 
     *例如array(&#39;name&#39;=>serialize(array(&#39;tank&#39;,&#39;zhang&#39;)),&#39;sex&#39;=>1,&#39;birth&#39;=>&#39;20101010&#39;) 
     *例如array(&#39;name&#39;=>array(&#39;tank&#39;,&#39;zhang&#39;),&#39;sex&#39;=>1,&#39;birth&#39;=>&#39;20101010&#39;)这样会报错的*/ 
     $data = array(&#39;name&#39; => &#39;test&#39;, &#39;sex&#39;=>1,&#39;birth&#39;=>&#39;20101010&#39;);  
     curl_setopt($ch, CURLOPT_URL, &#39;http://localhost/mytest/curl/upload.php&#39;);  
     curl_setopt($ch, CURLOPT_POST, 1);  
     curl_setopt($ch, CURLOPT_POSTFIELDS, $data);  
     curl_exec($ch);  
     ?>

In the upload.php file, print_r($_POST); can use curl to grab the content Array output by upload.php ( [name] => test [sex] => ; 1 [birth] => 20101010 )

【Recommended related articles】

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php curl_setopt function concept and usage examples

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Detailed explanation of usage examples of PHP curl_exec function

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