[PHP] php: "else if" problem

[Leonidas Savvides]

to: 'php-general@lists.php.net'
 
from: Leonidas Savvides
 
 
Please see my problem below in PHP code :
  _____  

<?php
      echo $month, $day, $year, $month2, $day2, $year2;    // these are
ok-normal values from web form 
      if ( ! @checkdate($month,$day,$year) ) {
       echo "this operate till here";  // include_once
("normaldays.php");   @  //   wrongpickupdate.htm
      } else if ( ! @checkdate($month2,$day2,$year2) ) {
       include_once ("wrongdropoffdate.htm"); 
      } else if ( $tsp < $tsnow ) {           //  "$tsp"=time stamp
pickup date
       include_once ("wrongpickupdate.htm");     // include_once
("normaldays.php");         //   wrongpickupdate.htm
      } else if ( $tsp >= $tsd ) {           //  "$tsd"=time stamp drop
off date
       include_once ("wrongpickupdate.htm"); 
      } else if ( $days >= 60 ) {           //  "$days" var come from
"$tsd" & "$tsp"
       include_once ("manydays.htm");
      } else if ( $days <= 2 ) {
       include_once ("fewdays.htm");
      } else {
       include_once ("normaldays.php"); 
      }
 
?>
  _____  

problem
 
1.      executes first statement what ever vars are 
2.      if no "!" to  first statement , executes second statement 
3.      if no "!" to  first & second  statement, executes first
include_once() statement meaning :      
} else if ( $tsp < $tsnow ) {
include_once ("wrongpickupdate.htm"); 
}
whatever values of  $tsp & $tsnow are .
 
well WHERE THE PROBLEM IS ?
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*       Leonidas Savvides