Persist on the SET Cookie response from the server

when HTTP_REQUEST {
   if { [HTTP::cookie exists "PHPSESSID"] } {
      set pl [persist lookup uie [HTTP::cookie "PHPSESSID"] ]
      if { $pl ne "" } {
         pool front member [lindex $pl 1] [lindex $pl 2]
      } else {
         log local.0 "Session ID [HTTP::cookie "PHPSESSID"] expired on the server for client [IP::client_addr]"
         pool front
      }
   }
}
when LB_FAILED {
   pool front
   log local.0 "LB Failed for client [IP::client_addr]"
   LB::reselect
}
when HTTP_RESPONSE {
   if { [HTTP::cookie exists "PHPSESSID"] } {
      set pl2 [persist lookup uie [HTTP::cookie "PHPSESSID"] ]
      if { $pl2 ne ""} {
         log local.0 "Existing Cookie PHPSESSID $pl2 generated by [IP::server_addr] and within persistance table 
[lindex $pl2 1] [lindex $pl2 2] for client [IP::client_addr]"
      }
      persist add uie [HTTP::cookie "PHPSESSID"]
   }
}