Yesterday I was close to a nervous breakdown, because my beloved PHP regex tester, formerly to be found at http://nancywalshee03.freehostia.com/, doesn’t exist any more. So I shorthand created another gem of dirty programming work and wrote a new one quickly, to be found at http://www.ginchen.de/regextester/.
preg_match_all() to find the needle in the haystack and displays the consequent PHP array as result. The search pattern must be entered with delimiters. May it be of help to other desperates, too. ;)