DOMDocument « Yuriy Zisin

19Feb/090

PHP DOMDocument class and HTML entities

DOMDocument class behaves strange sometimes. It could omit some entities like “ and some valid UTF-8 characters (it also may do so for other encodings). This probably could be fixed by using own DTD, but there is a simple way too. Each HTML entity has its binary code, so DOMDocument will export your entities correctly if you replace the entities by the appropriate codes. I have a small list of them. By using the following function you can avoid symbols loss:

function parseEntities($string) {
    $entities = array (
        "auml" => "&#228;",
        "ouml" => "&#246;",
        "uuml" => "&#252;",
        "szlig" => "&#223;",
        "Auml" => "&#196;",
        "Ouml" => "&#214;",
        "Uuml" => "&#220;",
        "nbsp" => "&#160;",
        "Agrave" => "&#192;",
        "Egrave" => "&#200;",
        "Eacute" => "&#201;",
        "Ecirc" => "&#202;",
        "egrave" => "&#232;",
        "eacute" => "&#233;",
        "ecirc" => "&#234;",
        "agrave" => "&#224;",
        "iuml" => "&#239;",
        "ugrave" => "&#249;",
        "ucirc" => "&#251;",
        "uuml" => "&#252;",
        "ccedil" => "&#231;",
        "AElig" => "&#198;",
        "aelig" => "&#330;",
        "OElig" => "&#338;",
        "oelig" => "&#339;",
        "angst" => "&#8491;",
        "cent" => "&#162;",
        "copy" => "&#169;",
        "Dagger" => "&#8225;",
        "dagger" => "&#8224;",
        "deg" => "&#176;",
        "emsp" => "&#8195;",
        "ensp" => "&#8194;",
        "ETH" => "&#208;",
        "eth" => "&#240;",
        "euro" => "&#8364;",
        "half" => "&#189;",
        "laquo" => "&#171;",
        "ldquo" => "&#8220;",
        "lsquo" => "&#8216;",
        "mdash" => "&#8212;",
        "micro" => "&#181;",
        "middot" => "&#183;",
        "ndash" => "&#8211;",
        "not" => "&#172;",
        "numsp" => "&#8199;",
        "para" => "&#182;",
        "permil" => "&#8240;",
        "puncsp" => "&#8200;",
        "raquo" => "&#187;",
        "rdquo" => "&#8221;",
        "rsquo" => "&#8217;",
        "reg" => "&#174;",
        "sect" => "&#167;",
        "THORN" => "&#222;",
        "thorn" => "&#254;",
        "trade" => "&#8482;"
     );

    foreach ($entities as $ent=>$repl) {
        $string = preg_replace('/&'.$ent.';?/m', $repl, $string);
    }

    return $string;
}

This list contains not all the entities, but it is easy to inroduce new ones without any other code influence.

Tagged as: DOMDocument, entities, HTML, php, XML No Comments

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