We couldn't find any complete enough PHP installs.
You may well have PHP installed on your system but are lacking either the
command line version or the php-config program that should accompany each
PHP install. Sometimes, these require that you install the "dev" package
for PHP or the "cli" version. We need one or the other.

Please visit http://oneapm.com/docs/php and review the installation
documentation for ways in which you can customize this script to look for
PHP in non-standard locations or to do a manual install.