Regular expression to match “>”, “<”, “&” chars that appear inside XML nodes

Question

I\'m trying to write a regular expression using the PCRE library in PHP.

I need a regex to match only &, > and < cha

Answer 1

In the end I've opted to use the Tidy library in PHP. The code I used is shown below:

  // Specify configuration
  $config = array(
    'input-xml'  => true,
    'show-warnings' => false,
    'numeric-entities' => true,
    'output-xml' => true);

  $tidy = new tidy();
  $tidy->parseFile('feed.xml', $config, 'latin1');
  $tidy->cleanRepair()

This works perfectly correcting all the encoding errors and converting invalid characters to XML entities.