PHP提取和解析_基本问题

Question

I have some files (about 500 files) with NO extension.
But I managed to view its contents , it has some weird tags and stuff.

I need to extract all IP addreesses from it.. For ex in line 2 there is always an IP address like this ... (71.129.195.163)

Also, there are some html tags like < a href = "http://www.xyz.com" > in a lot of lines. I need to get this domain name from it , like xyz.com.

could someone assist this php newbie? i know to get the entire file as a string and all tht.. but since php is powerful, I am looking for a sweet and simple way to achieve this .

Thanks a lot

Answer 1

Regular expressions are great for this.

To find all IPs in a file:

$ipPattern = '/(?:25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)(?:[.](?:25[0-5]|2[0-4]\d|1\d\d|[1-9]\d|\d)){3}/';

$ips = array();
preg_match_all($ipPattern, $fileContents, $ips);
$ips = $ips[0];

To find all links:

$linkPattern = '/href(\s+)?\=(\s+)?[\'"](.+?)[\'"]/';

$links = array();
preg_match($linkPattern, $fileContents, $links);

$link = $links[3];

The file content is assumed to be in $fileContents. Run this code for every file. If you need to collect all IPs and domains than you can merge them into big arrays:

$allIps = array();
$allLinks = array();

// after each run of the above code do:
$allIps = array_merge($allIps, $ips);
$allLinks[] = $link;