Query4All.com
Preg
Data generated from past analysis.
https://www.php.net/manual/en/function.preg-match-all.php
https://camelia.lt/medicinos-priemone/85579-testas-nestumui-nustatyti-juostele-rapi-preg-0402.html
https://docs.moodle.org/en/Preg_question_type
https://stackoverflow.com/questions/9040435/whats-the-difference-between-and-in-php-preg-match
https://pregonline.com/
https://www.php.net/manual/en/function.preg-replace.php
https://www.benu.lt/medicinines-prekes/seimos-planavimas/nestumo-ir-ovuliacijos-testai/rapi-preg-testas-nestumui-nustatyti-kasete-n1
https://en.wiktionary.org/wiki/preg
https://camelia.lt/medicinos-priemone/95609-tiesioginis-testas-nestumui-nustatyti-rapi-preg1vnt-4779022530142.html