Hello,
I have well-formed xml documents into string variables. I want to use preg_replace to add a defined attribute to every xml tags.
For example replace:
<tag1>
<tag2> some text </tag2>
</tag1>
by:
<tag1 attr="myAttr">
<tag2 attr="myAttr"> some text </tag2>
</tag1>
So I basically need the regex expression to find any start tags and add my attribute, but I'm a complete regex noob.
Thanks, kats
$xml_data = preg_replace("/<([^\/]+\w+)/", "<\\1 attr=\"myAttr\">", $xml_data);
Don't use regular expressions for working on xml. Xml is not a regular language. Use the xml extensions of php instead:
$xml = new SimpleXml(file_get_contents($xmlFile));
function process_recursive($xmlNode) {
$xmlNode->addAttribute('attr', 'myAttr');
foreach ($xmlNode->children() as $childNode) {
process_recursive($childNode);
}
}
process_recursive($xml);
echo $xml->asXML();
All answers containing regular expressions will break this valid xml, for example:
<?xml version="1.0" encoding='UTF-8'?>
<html>
<head>
<!-- <meta> ... </meta> -->
<script>//<![CDATA[
function load() {document.write('<tt>Test</tt>');}
//]]></script>
<title><![CDATA[Fancy <<SiteName>> [with Breadcrumbs] > in > title]]></title>
</head>
<body onload="load()">
<input
type="submit"
value="multiline
button
text"
/>
</body>
</html>
OK, for those reading these lines and are still interested about using the regex way for some reasons, here is how to do it:
$xml_data= preg_replace('/(<[A-Za-z0-9\-\_]+[^>]*)>/u','\1 attr="myAttr">',$xmlData);
Tested and approved!
But, as discussed earlier, use that one with caution! Use it only on XML source that you know won't be broken (see soulmerge post about that)
Cheers, kats