IRULE - Search in http query and set two variables

Hello you can get inspiration from this one : https://devcentral.f5.com/wiki/iRules.URIInterrogation.ashx

when HTTP_REQUEST {
    set namevals [split [HTTP::query] "&"]
    for {set i 0} {$i < [llength $namevals]} {incr i} {
        set params [split [lindex $namevals $i] "="]
        set pnum [expr $i+1]
        log local0. "Param\[$pnum\]: [lindex $params 0]"
        log local0. "Value\[$pnum\]: [URI::query [HTTP::uri] [lindex $params 0]]"
      }
}