Re.: simplexml_load_file parser error with ampersands in urls

Yes, an unescaped ampersand is not allowed in XML, including the attributes. See the exaplanation and examples here: https://www.w3resource.com/xml/prohibited-character-literals.php

You can also use XML validation tools to see if your sample XMLs are valid, e.g.: https://www.xmlvalidation.com/

Regards,
Janis

________________________________
No: Dennis Nezic <[email protected]>
Nosūtīts: svētdiena, 2022. gada 5. jūnijs 04:52
Kam: [email protected] <[email protected]>
Tēma: simplexml_load_file parser error with ampersands in urls

If there are ampersands (&) in links within tags (eg. href= url=
rel=) simplexml_load_file() fails with

  parser error : EntityRef: expecting ';'

This useful comment in the manual suggests str_replace()'ing it with
the &amp; entity:

  https://www.php.net/manual/en/function.simplexml-load-file.php#117566

%26 url encoding also works, although no other character that
I'm aware of seems to cause this parser error / requires
urlencode()'ing.

But this seems like a bug, or something that simplexml_load_file should
be able to handle? Or does xml or something not allow &'s in tag
properties?

For example, trying to load this file:

<?xml version="1.0"?>
<feed xmlns="http://www.w3.org/2005/Atom">
  <entry>
    <link href="http://example.com/bla.php?yes&no" />
  </entry>
</feed>