If you have downloaded PHP PEAR package manager from its official website in past 6 months, we are sorry to say that your server might have been compromised.
"Also note that this does *not* affect the PEAR installer package itself... it affects the go-pear.phar executable that you would use to initially install the PEAR installer. Using the 'pear' command to install various PEAR package is *not* affected."
whitespace
10:06 pm on Jan 26, 2019 (gmt 0)
A possible respite...
UPDATE — The PEAR team has published more details about the recent security incident, explaining the tainted "go-pear.phar" found on its server appeared to be planted after the last official file release on 20 December 2018.