mixed PEAR_Dependency::checkSAPI (
, string $name
, string $req
, string $relation = 'has'
SAPI backend check method. Version comparison is not yet available here.
this variable will contains an error message, if check fail
name of SAPI backend
which version to compare (currently unused)
how to compare versions (currently hardcoded to 'has')
FALSE if dependency could be resolved
successfully(!); or an
in case of unresolved dependency.
This function can not be called statically.