Block elements inside "a" tag (htmlpurifier) - php

Question

How I can prevent HTMLPURIFIER break this code:
<a target="_blank" href="http://www.example" class="link_normal opacity">
<blockquote url="http://www.example" class="big">
<div class="center">
<div class="table_cell"><img src="/images/imagenes_urls/4241.jpg" class="img_url"></div>
</div>
<p style="color:#3b5998" class="b">Desde los 80 hasta 2015, así ha sido la impresionante evolución de los móviles</p>
<p>¿Cómo olvidarse de aquellos enormes objetos a los que llamábamos teléfonos móviles? Muchos de vosotros los recordar...</p>
<span class="dominio">andro4all.com</span>
</blockquote></a>
When i use it turns into something like this:
<blockquote class="big">
<a class="link_normal opacity" href="http://www.example"></a>
<div class="center">
<a class="link_normal opacity" href="http://www.example"></a>
<div class="table_cell">
<a class="link_normal opacity" href="http://www.example">
<img alt="4241.jpg" class="img_url" src="/images/imagenes_urls/4241.jpg">
</a>
</div>
<a class="link_normal opacity" href="http://www.example"></a>
</div>
<a class="link_normal opacity" href="http://www.example"></a>
<p class="b" style="color:#3b5998;">
<a class="link_normal opacity" href="http://www.example">Desde los 80 hasta 2015, así ha sido la impresionante evolución de los móviles</a>
</p></blockquote>

Answer 1

you can use a trick like adding JavaScript to your main tag like:
onclick="document.location='http://www.example'"
and you can add pointer style to cursor to make it look like a normal link:
style="cursor:pointer"
and that will be like this:
<blockquote url="http://www.example" class="big" onclick="document.location='http://www.example'" style="cursor:pointer">
<div class="center">
<div class="table_cell"><img src="/images/imagenes_urls/4241.jpg" class="img_url"></div>
</div>
<p style="color:#3b5998" class="b">Desde los 80 hasta 2015, así ha sido la impresionante evolución de los móviles</p>
<p>¿Cómo olvidarse de aquellos enormes objetos a los que llamábamos teléfonos móviles? Muchos de vosotros los recordar...</p>
<span class="dominio">andro4all.com</span>
</blockquote>

Answer 2

That is not valid to wrap grouping tag blockquote with inline a tag in HTML4.
Also you can find here good information over this tag http://www.w3.org/html/wg/drafts/html/master/grouping-content.html#the-blockquote-element

Answer 3

After experimentation, I just discovered a slick answer to this specific question. You can customize HTMLPurifier's behavior, as described at http://htmlpurifier.org/docs/enduser-customize.html.
Specifically, you can overwrite the default behavior of the 'a' anchor element by defining the element again, like this:
include_once('HTMLPurifier.auto.php');
$config = HTMLPurifier_Config::createDefault();
$def = $config->getHTMLDefinition(true);
// here is the magic method that overwrites the default anchor definition
$def->addElement(
'a', // element name
'Inline', // the type of element: 'Block','Inline', or false, if it's a special case
'Flow', // what type of child elements are permitted: 'Empty', 'Inline', or 'Flow', which includes block elements like div
'Common' // permitted attributes
);
$purifier = new HTMLPurifier($config);
// $dirty_html is the html you want cleaned
echo $purifier->purify($dirty_html);
Now you can include block elements inside anchor tags, as allowed in the HTML5 specification (http://dev.w3.org/html5/markup/a.html).
For a more robust HTML5 solution, Christoffer Bubach offers a detailed HTMLPurifier configuration to allow newer HTML5 tags, though it doesn't redefine the anchor tag to permit block elements inside it. See his answer to this SO question: HTML filter that is HTML5 compliant