Hackers backdoor PHP source code after breaching internal git server

here and here gave the code the code-injection capability to visitors who had the word “zerodium” in an HTTP header.

PHP.net hacked, code backdoored

The commits were made to the php-src repo under the account names of two well-known PHP developers, Rasmus Lerdorf and Nikita Popov. “We don’t yet know how exactly this happened, but everything points toward a compromise of the git.php.net server (rather than a compromise of an individual git account),” Popov wrote in a notice published on Sunday night.