https://sky.pro/wiki/html/rabota-s-atributami-href-i-on-click-v-html-poryadok-vypolneniya/?ysclid=lw3bq85fhr518102535

https://www.delftstack.com/howto/php/onclick-php/

https://phpclub.ru/talk/threads/%D0%9F%D0%B5%D1%80%D0%B5%D0%B4%D0%B0%D1%87%D0%B0-%D0%BF%D0%B5%D1%80%D0%B5%D0%BC%D0%B5%D0%BD%D0%BD%D1%8B%D1%85-%D1%87%D0%B5%D1%80%D0%B5%D0%B7-a-href.35261/