Flot (2010) SeqPHASE: a web tool for interconverting PHASE input/output files and FASTA sequence alignments Molecular Ecology Ressources 10 (1): 162-166 [link]

Step 2: converting PHASE output files into FASTA alignments

PHASE output file (.out or .out_pairs)    

If a .out file is inputted, a list of phased haplotypes will be returned as FASTA with 1-letter indetermination code letters (R, W, M, Y, S or K) at positions where phase certainty is inferior to a certain threshold (90% if PHASE default running options were used).

If a .out_pairs file is inputted, a list of all possible haplotype pairs for each individual will be returned as FASTA with their respective probabilities shown between parentheses.

Constant positions file (.const), if any    

If no .const file is inputted, the FASTA alignment will only contain variable positions.

Sort sequences    

Sort sequences in alphabetical order.

Reduce sequences    

Reduce output (recommended for some downstream applications, such as phylogenetic analyses)