Converting Word-Document to array in PHP

I need a small PHP-Script to convert a Word-Document (docx) into a php-array for further processing. There will be a Document (multiple pages) containing Headlines and a custom text underneath (including bold and italic texts). I need an associative array with two keys: Headline and Content. Bold texts should be converted to <b> Tags, italic texts to <i> Tags, line-breaks should be converted to \n. Headlines are identified by a font-size (e.g. 16) which can be edited in the script. Please check the Sample .docx File!