Question

I have a string that contains html.
How would I htmlentity the string so that everything except tags are encoded?
For example:

$foo = '<div class="link">Here\'s is a link: "<a href="http://www.example.com">Doors & windows</a>'</div>';

I want to convert it to

$out = '<div class="link">Here\'s is a link: &quot;<a href="http://www.example.com">Doors &amp; windows</a>&quot;</div>';

Answer 1

This code snippet shows a function that will load some xml (ensure that at least tags opened have a closing pendant and such, otherwise you will see / read some errors) and then applies htmlentities onto all text-nodes. I actually have no real clue for what you need that, but probably it makes you happy:

$foo = '<div class="link">Here\'s is a link: <a href="http://www.example.com">Doors & windows</a></div>';

echo text_htmlentities(utf8_encode($foo));

/**
 * add htmlentities onto the text-nodes of an
 * xml fragment.
 * 
 * @param string $foo xml fragment (utf8)
 * @return string
 */
function text_htmlentities($foo) {
    $foo = str_replace('&', '&amp;', $foo);
    $dom = new DOMDocument;
    $dom->loadXml($foo);
    $xpath = new DomXpath($dom);
    foreach($xpath->query('//text()') as $node) {
        $node->nodeValue = htmlentities($node->nodeValue, ENT_QUOTES, 'UTF-8', false);
    }
    return str_replace('&amp;','&', $dom->saveXml($dom->firstChild));
}

output:

<div class="link">Here&#039;s is a link: <a href="http://www.example.com">Doors &amp; windows</a></div>