(PHP 3 = 3.0.3, PHP 4 )
Returns an array of message numbers sorted by the given parameters.
Reverse is 1 for reverse-sorting.
Criteria can be one (and only one) of the following:
The flags are a bitmask of one or more of the following:
SE_UID Return UIDs instead of sequence numbers SE_NOPREFETCH Don't prefetch searched messages.