This will overwrite an existing dependency if it is found. In other words, if a dependency on PHP 4.1.0 exists, and addDependency('php', '4.3.0', 'ge', 'php') is called, the existing dependency on PHP 4.1.0 will be overwritten with the new one on PHP 4.3.0
Parameter
string
$name
Dependency element name
string
$version
Dependency version
string
$operator
A specific operator for the version, this can be one of:
'has', 'not', 'lt', 'le',
'eq', 'ne', 'ge', or 'gt'
string
$type
Dependency type. This can be one of: 'pkg', 'ext',
'php', 'prog', 'os', 'sapi', or
'zend'
