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Asked: 2026-05-20T14:47:08+00:00

Bascially I’m writing a templating system for my CMS and I want to have

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Bascially I’m writing a templating system for my CMS and I want to have a modular structure which involves people putting in tags like:

<module name="news" /> or <include name="anotherTemplateFile" /> which I then want to find in my php and replace with dynamic html.

Someone on here pointed me towards DOMDocument, but I’ve already come across a problem.

I’m trying to find all <include /> tags in my template and replace them with some simple html. Here is my template code:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
<title>CMS</title>
<include name="head" />
</head>

<body>

<include name="header" />

<include name="content" />

<include name="footer" />

</body>
</html>

And here is my PHP:

$template = new DOMDocument();
$template->load("template/template.tpl");

foreach( $template->getElementsByTagName("include") as $include ) {
    $element = '<input type="text" value="'.print_r($include, true).'" />';
    $output = $template->createTextNode($element);
    $template->replaceChild($output, $include);
}

echo $template->saveHTML();

Now, I get the fatal error Uncaught exception 'DOMException' with message 'Not Found Error'.

I’ve looked this up and it seems to be that because my <include /> tags aren’t necessarily DIRECT children of $template its not replacing them.

How can I replace them independently of descent?

Thank you

Tom

EDIT

Basically I had a brainwave of sorts. If I do something like this for my PHP I see its trying to do what I want it to do:

$template = new DOMDocument();
    $template->load("template/template.tpl");

    foreach( $template->getElementsByTagName("include") as $include ) {
        $element = '<input type="text" value="'.print_r($include, true).'" />';
        $output = $template->createTextNode($element);
        // this line is different:
        $include->parentNode->replaceChild($output, $include);
    }

    echo $template->saveHTML();

However it only seems to change 1 occurence in the <body> of my HTML… when I have 3. :/

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1 Answer

  1. Editorial Team

    This is a problem with your DOMDocument->load, try 

    $template->loadHTMLFile("template/template.tpl");

    But you may need to give it a .html extension.

    this is looking for a html or an xml file. also, whenever you are using DOMDocument with html it is a good idea to use libxml_use_internal_errors(true); before the load call.

    OKAY THIS WORKS:

    foreach( $template->getElementsByTagName("include") as $include ) {
     if ($include->hasAttributes()) {
     $includes[] = $include;
     }
     //var_dump($includes);
 }
 foreach ($includes as $include) {
            $include_name = $include->getAttribute("name");
        $input = $template->createElement('input');
$type = $template->createAttribute('type');
$typeval = $template->createTextNode('text');
$type->appendChild($typeval);
$input->appendChild($type);
$name = $template->createAttribute('name');
$nameval = $template->createTextNode('the_name');
$name->appendChild($nameval);
$input->appendChild($name);
$value = $template->createAttribute('value');
$valueval = $template->createTextNode($include_name);
$value->appendChild($valueval);
$input->appendChild($value);
if ($include->getAttribute("name") == "head") {
       $template->getElementsByTagName('head')->item(0)->replaceChild($input,$include);
}
else {
        $template->getElementsByTagName("body")->item(0)->replaceChild($input,$include);
}
        }
        //$template->load($nht);
        echo $template->saveHTML();
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