(PECL rpminfo >= 0.1.0)
rpmvercmp — RPM version comparison
$evr1, string $evr2): intCompare 2 RPM versions.
evr1First epoch:version-release string
evr2Second epoch:version-release string
Returns < 0 if evr1 is less than evr2, > 0 if evr1 is greater than evr2, and 0 if they are equal.