Nofollow on links in CKEditor

Does anyone know where in CKEditor I can setup, so all links added will have rel="nofollow", even if the users don't specify it?


You can create a data filter as explained in this page that checks every link: http://docs.cksource.com/CKEditor_3.x/Developers_Guide/Data_Processor

This (untested) code should be more or less what you need:

editor.dataProcessor.htmlFilter.addRules( { elements : { a : function( element ) { if ( !element.attributes.rel ) element.attributes.rel = 'nofollow'; } } });


Need wrapper:



Put the code on page where ckeditor is loading

CKEDITOR.on('dialogDefinition', function(ev) { var editor = ev.editor; editor.dataProcessor.htmlFilter.addRules( { elements : { a : function( element ) { if ( !element.attributes.rel ) element.attributes.rel = 'nofollow'; } } }); })


I'm using PHP Codeigniter with CKEditor and if you want to add rel="nofollow" only for external links you can modify the output of CKEditor before save it to database. Here the PHP function I use to modify:

function addNofollow($content) { $dom = new DOMDocument(); @$dom -> loadHTML(mb_convert_encoding($content, 'HTML-ENTITIES', 'UTF-8')); $x = new DOMXPath($dom); // Add rel="nofollow" foreach ($x -> query("//a") as $node) { $href = $node -> getAttribute("href"); if (!strpos($href, site_base())) { $node -> setAttribute("rel","nofollow"); } else { $node -> removeAttribute("rel"); } } // Remove <script> tag $script = $dom->getElementsByTagName('script'); $remove = []; foreach ($script as $item) { $remove[] = $item; } foreach ($remove as $item) { $item -> parentNode -> removeChild($item); } $newHtml = $dom -> saveHtml($dom->getElementsByTagName('div')->item(0)); return $newHtml; }


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