Check for a given link in a remote page

Check for a given link in a remote page written by Michael Phipps

Method 1:
Create a php file and add the following codes.

/* Check for Reciporical Link Use this script to check if reciporical link agreements are being honoured. In this simple example we are just checking for the existance of a url in any pair of <a></a> tags on a link page. */ // The url that should appear on the link page $url="http://michaelphipps.com"; // The link page that should contain the url $link_page="http://curl.haxx.se/libcurl/php/examples/multi.html"; // Use Curl to return the raw source of a webpage to a variable called $result $ch = curl_init(); curl_setopt($ch, CURLOPT_URL,$link_page); curl_setopt($ch, CURLOPT_RETURNTRANSFER,1); $result=curl_exec ($ch); curl_close ($ch); // Search for the $url on the $link_page. /* Returns the result in an array called $matches (this regular expression could probably be improved...) */ preg_match ("|<[aA] (.+?)".$url."(.+?)>(.+?)<\/[aA]>|i", $result, $matches); // See if there were any matches /* (note preg_match only returns the first match, use preg_match_all to return all matches) */ if (count($matches)>0){ // if there are items in the array, then there was a match. echo "The link exists on the target website"; print_r($matches); /* If you require very specific link text you can use the information returned in the $matches array to further assess if your website is being linked the way you want. */ }else{ // if there are no items in the array, then no matches were found. echo "The link does not exist on the target website"; }

The codes are easy to understand and well commented. The $url is the wesites link you are searching for. The $link_page is the page you searching for the link in.