Last week, cybersecurity researchers disclosed two serious vulnerabilities in PHP, an open-source, server-side programming language used by about 70 percent of the world’s Web sites, prompting its developers to release urgent patches for the bugs, and forcing governments and companies worldwide to f. Add TT as Preferred Source Last week, cybersecurity researchers disclosed two serious vulnerabilities in PHP, an open-source, server-side programming language used by about 70 percent of the world’s Web.