if( $_GET) if else problem

need help...

the getting input form:

<select name="age">     
<option value="25-30">25-30</option>
<option value="31-40">31-40</option>        
<option value="41-50">41-50</option>
<option value="51-60">51-60</option>
</select>

example url

search/?age=25-30

the function php:

if ( $_GET['age'] !="25-30") $age = '("A")'; 
elseif ( $_GET['age'] !="31-40") $age = '("B")'; 
elseif ( $_GET['age'] !="41-50") $age = '("C")'; 
elseif ( $_GET['age'] !="51-60") $age = '("D")'; 
else ( $_GET['age'] !="25-30") $age = '("A"开发者_开发技巧)'; 

$search ="http://domain.com/?q='.$age;

the problem: the $age inside $search always returns A (or 25-30) even though i have selected other values (31-40, 41-50, 51-60)

please help..thanks

else should represent a default value and ( $_GET['age'] !="25-30") should be removed from it and here is what you should have actually:

if ( $_GET['age'] =="25-30") $age = '("A")'; 
elseif ( $_GET['age'] =="31-40") $age = '("B")'; 
elseif ( $_GET['age'] =="41-50") $age = '("C")'; 
elseif ( $_GET['age'] =="51-60") $age = '("D")'; 
else $age = '("A")'; // modify accordingly

You could do this cleaner using a switch statement or an array with values, but before going into examples: Wouldn't it be easier to just set the value to A, B, C... in the select in the first place?

Re @Col.Shrapnels comment. Which one looks better. The if soup above, or this?

switch($_GET["age"])
 {
   case "25-30": $age = "A"; break;
   case "31-40": $age = "B"; break;
   case "41-50": $age = "C"; break;
   case "51-60": $age = "D"; break;
   default:      $age = "E"; break;  // or whatever

 }

I think you mean

==

not

!=

How do you think, what does != operator mean?

Anyway,

<select name="age">     
<option value="A">25-30</option>
<option value="B">31-40</option>        
<option value="C">41-50</option>
</select>

You are using the "Not Equal To" ("!=") Operator, and so, unless you select 25-30 from the list (which should result in (B), it will always stop at the first line.

For the full code, I would use:

switch( $_GET['age'] ) {
  case '25-30' :
    $age = '("A")'; break;
  case '31-40' :
    $age = '("B")'; break;
  case '41-50' :
    $age = '("C")'; break;
  case '51-60' :
    $age = '("D")'; break;
  default :
    $age = '("A")';
}