PHP 4 commonly used crawl network data method, PHP4 crawl Data _php Tutorial

PHP 4 commonly used crawl network data method, PhP4 kind of crawl data

The name of this section is Fsockopen,curl and file_get_contents, specifically to explore these three ways of network data input and output of some of the summary. About Fsockopen Front has been talked about a lot, below began to transfer to others. Here is a brief list of some common ways to crawl network data.

1. Use file_get_contents to get the content in the Get mode:

$url = ' http://localhost/test2.php '; $html = file_get_contents ($url); Echo $html;

2. Open the URL with fopen and get the content in Get mode

$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 by post

$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/ /timeout (unit: s)), $url = "http://localhost/test2.php"; $context = Stream_context_create ($options); $result = file_get_ Contents ($url, False, $context); Echo $result;

4. Using the Curl Library, before using the Curl Library, you may need to check to see if the php.ini has already turned on the curl extension

$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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