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Title : PHP Script to find url links in a page
Categories : PHP, URLs, Regexps, Arrays Click here to Update Your Picture
Mark Allsop
Date : Mar 19th 2008
Grade : 2 of 5 (graded 3 times)
Viewed : 1408
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find url links in a page

<?php
// findlinks.php
// php code example: find links in an html page
// mallsop.com 2006 gpl
echo "<HTML><HEAD><TITLE>findlinks.php</TITLE></HEAD> \n";
echo
"<BODY bgcolor=\"#336699\" text=\"000000\" link=\"#416D96\" vlink=\"#414141\" alink=\"#DDCEA2\"> \n";
echo
"<form method=post action=\"$PHP_SELF\"> \n";
echo
"<p><table align=\"absmiddle\" width=\"100%\" bgcolor=\"#ededed\" name=\"tablesiteopen\" border=\"0\">\n";
echo
"<tr><td align=left>";
if (
$_POST["FindLinks"]) {
       
$urlname = trim($_POST["urlname"]);
        if (
$urlname == "") {
            echo
"Please enter a urlname. <br>\n";
            }
        else {
// open the html page and parse it
   
           
$page_title = "n/a";
           
$links[0] = "n/a";
           
//$meta_descr = "n/a";
            //$meta_keywd = "n/a";
   
           
if ($handle = @fopen($urlname, "r")) { // must be able to read it
               
$content = "";
                while (!
feof($handle)) {
                   
$part = fread($handle, 1024);
                   
$content .= $part;
                   
// if (eregi("</head>", $part)) break;
                   
}
               
fclose($handle);
               
$lines = preg_split("/\r?\n|\r/", $content); // turn the content into rows
   
                    // boolean
               
$is_title = false;
               
//$is_descr = false;
                //$is_keywd = false;
               
$is_href = false;                     
                   
$index = 0;

               
//$close_tag = ($xhtml) ? " />" : ">"; // new in ver. 1.01
               
foreach ($lines as $val) {
                    if (
eregi("<title>(.*)</title>", $val, $title)) {
                       
$page_title = $title[1];
                       
$is_title = true;
                        }
                            if (
eregi("<a href=(.*)</a>", $val, $alink)) {     
                               
                             
$newurl = $alink[1];
                                   
$newurl = eregi_replace(' target="_blank"', "", $newurl);
                                   
$newurl = trim($newurl);
                                   
$pos1 = strpos($newurl, "/>");                       
                                    if (
$pos1 !== false) {
                                           
$newurl = substr($newurl, 1, $pos1);
                                            }
                                   
$pos2 = strpos($newurl, ">");                       
                                    if (
$pos2 !== false) {
                                           
$newurl = substr($newurl, 1, $pos2);
                                            }
                                   
$newurl = eregi_replace("\"", "", $newurl);
                                   
$newurl = eregi_replace(">", "", $newurl);
           
                                   
//if (!eregi("http", $newurl)) { // local
                                        //    $newurl = "http://".$_SERVER["HTTP_HOST"]."/".$newurl;
                                    //    }
                                   
if (!eregi("http", $newurl)) { // local
                                           
$pos1 = strpos($newurl, "/");                       
                                            if (
$pos1 == 0) {
                                               
$newurl = substr($newurl, 1);
                                            }
                                           
$newurl = $urlname.$newurl;
                                        }                               
                                   
                                   
// put in array of found links
                                   
$links[$index] = $newurl;
                                   
$index++;
                             
$is_href = true;
                               
                            }
                   
                    }
// foreach lines done

               
echo "<p><b>Page Summary</b><br>\n";
                echo
"<b>Url:</b> ".$urlname."<br>\n";
                if (
$is_title) {
                    echo
"<b>Title:</b> ".$page_title."<br>\n";
                    }
                else {
                    echo
"No title found<br>\n";
                    }
                echo
"<b>Links:</b><br>\n";
                if (
$is_href) {
                    foreach (
$links as $myval) {
                        echo
"Link: ".$myval."<br>\n";
                        }
                    }
                else {
                    echo
"No links found<br>\n";
                    }
                echo
"End</p>\n";
                }
// fopen handle ok
       
else {
            echo
"<br>The url $urlname does not exist or there was an fopen error.<br>";
            }   
        echo
"Press the back button to try again.<br>";
        }
// end else urlname given
   
} // else find links now submit
else {
   
$urlname = "http://www.google.com/intl/en/about.html"; // or whatever page you like
   
echo "<p><b>findlinks.php example</b><br>\n";
    echo
"File or URL: <input type=\"TEXT\" name=\"urlname\" value=\"$urlname\" maxlength=\"255\" size=\"80\"><br>\n";
    echo
"<input type=\"SUBMIT\" name=\"FindLinks\" value=\"Find\"></font><br></p> \n";
    }
echo
"</td></tr>";
echo
"</table></p>";
echo
"</form></BODY></HTML>\n";

?>



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