PHP Regular Expressions get all the links in the contents of the method _ regular expression

The examples in this article describe the way in which PHP regular expressions get all the links to content. Share to everyone for your reference. Specifically as follows:

Here are two ways to link PHP, they can get all the links to the content and save to an array, of course, can also replace all the links.

Method One, the code is as follows:

Copy Code code as follows:

function Get_all_url ($code) {
Preg_match_all ('/<as+href=[' | ')? ([^> "']+") ["|']? S*[^>]*> ([^>]+) </a>/i ', $code, $arr);
Return Array (' name ' => $arr [2], ' URL ' => $arr [1]);
}

Method Two, the code is as follows:

Copy Code code as follows:

$site =substr ($url, 0,strpos ($url, "/", 8))/site
$base =substr ($url, 0,strrpos ($url, "/") +1);//File directory
$fp = fopen ($url, "R");//Open URL

while (!feof ($FP)) $contents. =fread ($FP, 1024);//
$pattern = "|href=['"]? ([^ '"]+) [']|u ';

Preg_match_all ($pattern, $contents, $regarr, preg_set_order);//Match All href=
for ($i =0; $i <count ($regarr); $i + +) {//Traverse all matches
if (!eregi ("://", $regarr [$i][1]))//is a relative path, that is, whether there are still://
if (substr ($regarr [$i][1],0,1) = = "/")//is the root directory of the site
echo "link". ($i + 1). ":". $site. $regarr [$i][1]. " <br/>/root directory
Else
echo "link". ($i + 1). ":". $base. $regarr [$i][1]. " <br/>/Current Directory
Else
echo "link". ($i + 1). ":". $regarr [$i][1]. " <br/>/relative path
}
Fclose ($FP);

I hope this article is helpful to the regular expression learning.