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Link: http://codepad.org/Di5YAez7    [ raw code | output | fork ]

PHP, pasted on Sep 7: 
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<?php
$html = new DOMDocument("1.0", "UTF-8");
$html->loadHTML("<html><body><p style=\"color:red;\"></p></body></html>");
$pars = $html->getElementsByTagName("p");

echo count($pars)." paragraphs found\n-------------------\n";

foreach ($pars as $par) {
    if ($par->textContent == "") {
        $par->parentNode->removeChild($par);
    }
}

echo $html->saveHTML();
?>


Output: 
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1 paragraphs found
-------------------
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
<html><body></body></html>


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