PHP Modify an included file - php

Question

I have a bunch of .html files that I am including on a page. Conditionally, I need to add classes to some of the components in these files, for example:
<div id='foo' class='bar'></div>
to
<div id='foo' class='bar bar2'></div>
I know I can do this with some inline PHP like this
<div id='foo' class="bar <?php echo " bar2"; ?>"></div>
However, having PHP in any of the files I'm including is not an option.
I also looked into including a file and then modifying afterward, but that doesn't seem possible. Then I was thinking I should read the files line-by-line, and add it in then.
Is there a nicer way I'm not thinking of?

Answer 1

Since having PHP is not an option, you could use PHP's DOM Parser with an XPath selector:
$dom = new DOMDocument();
$dom->loadHTMLFile($htmlFile);
$finder = new DomXPath($dom);
// getting the class name using XPath
$nodes = $finder->query("//*[contains(#class, 'bar')]");
// changing the class name using setAttribute
foreach ($nodes as $node) {
$node->setAttribute('class', 'barbar2');
}
// modified HTML source
$html = $dom->saveHTML();
That should get you started.

Answer 2

You can use the DOMDocument class in PHP to retreive the information from the file and then add attributes and data.
I don't really remember the code for DOMDocument so I haven't included any code here (sorry), but here are some links:
Use this method to get the HTML from your file:
http://php.net/manual/en/domdocument.loadhtmlfile.php
Review the DOMDocument class:
http://php.net/manual/en/class.domdocument.php

Answer 3

You may need to use .php instead of .html.
So do like below:
$variableClass="bar2";
include("htmlfilename.html");
where the htmlfile.html consists of
<div id='foo' class="bar <?php echo $variableClass; ?>"></div>

Answer 4

Depends on what you actually want to achieve - but basically this tends to be better solved by jQuery on the client.
But anyway you might put your HTML fragments in a DOM object, analyze and modify it, and read the HTML back after the modifications, for example:
// including an HTML file writes to the output stream, so buffer this
ob_start();
include('myfile.html');
$html = ob_get_clean();
// make a DOMDocument
$doc = new DOMDocument();
$doc->loadHTML($html);
// make the changes you need to
$xpath = new DOMXPath($doc);
$nodelist $xpath->query('//div[#id="foo"]');
// etc...
// get modified HTML
$html = $doc->saveHTML();
Hope this helps.