I am new to PHP and Wordpress. I have 150 lines of PHP / wordpress code to be commented in a lot of details so that I can understand. I also need to change it slightly to work (minor changes). Beginning of the code below. Please prove you can do this by commenting the portion of code that I provided. Budget = 30 USD. No need to apply without doing the work and commenting the example in detail.
// de-funkify query
$the_query = preg_replace('~�*([0-9a-f]+);~ei', 'chr(hexdec("\\1"))', $the_query);
$the_query = preg_replace('~�*([0-9]+);~e', 'chr(\\1)', $the_query);