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Automatically setting link's TARGET to _blank if it doesn't point to my site


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Is there some way in PHP (or some other language maybe?) that I can automatically set a link's TARGET attribute to _blank if that link does not point to a page on my site?


For example, if I have <a href="http://www.mysite.com/">My Site</a>, it should be left alone, but if I have <a href="http://www.phpfreaks.com">PHP Freaks</a>, it should automatically open in a new window when clicked.


Any information is helpful.




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there definitely is possible with php because I used this method before on my old websites, although! Its much easier with javascript!


// change your domain name:
var yourURL = "localhost";
function outLinks() {
  var outLink;
  if (document.getElementsByTagName('a')) {
    for (var i = 0; (outLink = document.getElementsByTagName('a')[i]); i++) {
      if (outLink.href.indexOf(yourURL) == -1) {
        outLink.setAttribute('target', '_blank');
window.onload = function() {

(also I take no credit for this found this online)

just place anywhere in header section of file, and change localhost to youwebsite.com

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