bool
     PEAR_Validate::validState
     ( 
    
     string
     $state
    
   )
   This utility method can be used to determine whether a string is a valid state.
   Currently, states must be one of snapshot, devel,
   alpha, beta, and stable.
  
$state
     State string to validate.
throws no exceptions thrown
final - this method should not be overridden.
This function should be called statically.