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PHP study notes: collecting website content through curl

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Oct 15, 2016 am 10:31 AM

Regarding curl, please go to Baidu and I will go directly to the case.

First enable your curl extension, turn on the curl extension in the php.ini file, that is, cancel the semicolon of extension=php_curl.dll.

eg: Use curl to collect website content and output it to txt document:

Goal: Grab the homepage of this blog and output it to the document

<span style="font-size: 18px;"><?<span style="color: #000000;">php
</span><span style="color: #800080;">$ch</span> = curl_init("http://www.cnblogs.com/jianqingwang/"<span style="color: #000000;">);
</span><span style="color: #800080;">$fp</span> = <span style="color: #008080;">fopen</span>("example_jianqingwang.txt", "w"<span style="color: #000000;">);

curl_setopt(</span><span style="color: #800080;">$ch</span>, CURLOPT_FILE, <span style="color: #800080;">$fp</span><span style="color: #000000;">);
curl_setopt(</span><span style="color: #800080;">$ch</span>, CURLOPT_HEADER, 0<span style="color: #000000;">);

curl_exec(</span><span style="color: #800080;">$ch</span><span style="color: #000000;">);
curl_close(</span><span style="color: #800080;">$ch</span><span style="color: #000000;">);
</span><span style="color: #008080;">fclose</span>(<span style="color: #800080;">$fp</span><span style="color: #000000;">);
</span>?></span>

Effect:

eg: Capture website content and output directly

Goal: grab http://www.cnblogs.com/jianqingwang/ and output it directly

// 1. Initialization
$ch = curl_init();
// 2. Set options, including URL
curl_setopt($ch, CURLOPT_URL, "http:// www.cnblogs.com/jianqingwang/");
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 0);//Change to 0 and there will be no output
curl_setopt($ch, CURLOPT_HEADER, 0);
// 3. Execute and obtain the content of the HTML document
$output = curl_exec($ch);
// 4. Release the curl handle
curl_close($ch);
?>

<span style="font-size: 18px;">?</span>

Effect:

Note: The interface here is a little different, because the css and image addresses are both relative paths, so the images and css are invalid.

eg:

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