<?php

$IfNoneMatchPattern = '#(?:W/)?("[\x00-\x7f]*?")(?=$|, (?:W/)?"[\x00-\x7f]*?")#';

$test = '"s"d, fsdf", W/"sdf, sd"f2", "dsf"sdf, sdf345"';

preg_match_all($IfNoneMatchPattern, $test, $matches);

print_r($matches);