# File lib/php_serialize.rb, line 121
        def PHP.serialize_session(var, assoc = false) # {{{
                s = ''
                case var
                when Hash
                        var.each do |key,value|
                                if key.to_s =~ /\|/
                                        raise IndexError, "Top level names may not contain pipes"
                                end
                                s << "#{key}|#{PHP.serialize(value, assoc)}"
                        end
                when Array
                        var.each do |x|
                                case x
                                when Array
                                        if x.size == 2
                                                s << "#{x[0]}|#{PHP.serialize(x[1])}"
                                        else
                                                raise TypeError, "Array is not associative"
                                        end
                                end
                        end
                else
                        raise TypeError, "Unable to serialize sessions with top level types other than Hash and associative Array"
                end
                s
        end