IF elseif else usage

Question

So, now I've been trying to learn If, elseif and else statements properly.  And I'm doing something wrong. 
A guy told me his website would email specific people based on what zipcode they put in the contact form on his site.  I was wondering how he did it, so I tried to recreate something similar.
Here is what I've done:
1. I created a file called zipcodes.php
2. In this file it has set every zipcode to a variable.  For instance:
<?php
$Nashville=("37010" or "37027" or "37040" or "37055" or "37152");
?>
3.  I created a form with a field called 'zip'.
4. I created a php file called phpmail.php to send this form.
5. Right now, the top of this file looks like this:
<?php
include("zipcodes.php");
$zip=$_POST["zip"];
//NASHVILLE//
if ($zip==$Nashville)
$my_email = "[email protected]";
//Knoxville//
if ($zip==$Knoxville)
$my_email = "[email protected]";
//Huntsville//
if ($zip==$Huntsville)
$my_email = "[email protected]";
...etc.
This doesn't work.  It sends them all to the last option which is texas or [email protected]
Before I had the first if set to if and all the others set to elseif
But that didn't work.  It sent all the emails to Nashville email I made.
If statements must work though in this way.  Because if I have this:
if ($zip==$Nashville)
$my_email = "[email protected]";
     //Anything Else//
  else $my_email = "[email protected]";
It works.  Meaning if a zipcode is in Nashville it goes to one email - and if it isn't in Nashville - it goes to hippityhoppity.
Am I not getting something about all of this?  Thanks!

Answer 1

Yeah I know.  I also wish it'd let me use PHP syntax instead of plain.  I think it'd make things easier to read.
Here is the entire script.  It is made to work with any form with little regard for what the form has in it.  So long as there is an email field and a zip field.
<?php
include("zipcodes.php");
$zip=$_POST["zip"];
          if (in_array($zip, $Nashville)) {
$my_email = ".....";
          }elseif (in_array($zip, $Knoxville)) {
$my_email = ".....";
          }elseif (in_array($zip, $Huntsville)) {
$my_email = ".....";
          }elseif (in_array($zip, $Florida)) {
$my_email = ".....";
          }elseif (in_array($zip, $Georgia)) {
$my_email = ".....";
          }elseif (in_array($zip, $SouthCarolina)) {
$my_email = ".....";
          }elseif (in_array($zip, $NorthCarolina)) {
$my_email = ".....";
          }elseif (in_array($zip, $Pennsylvania)) {
$my_email = ".....";
          }elseif (in_array($zip, $Maryland)) {
$my_email = ".....";
           }elseif (in_array($zip, $Virginia)) {
$my_email = ".....";
           }elseif (in_array($zip, $Texas)) {
$my_email = ".....";
} else { $my_email = ".....";
$continue = "/";
$errors = array();
if(count($_COOKIE)){foreach(array_keys($_COOKIE) as $value){unset($_REQUEST[$value]);}}
function recursive_array_check_header($element_value)
global $set;
if(!is_array($element_value)){if(preg_match("/(%0A|%0D|\n+|\r+)(content-type:|to:|cc:|bcc: )/i",$element_value)){$set = 1;}}
else
foreach($element_value as $value){if($set){break;} recursive_array_check_header($value);}
recursive_array_check_header($_REQUEST);
if($set){$errors[] = "You cannot send an email header";}
unset($set);
if(isset($_REQUEST['email']) && !empty($_REQUEST['email']))
if(preg_match("/(%0A|%0D|\n+|\r+|:)/i",$_REQUEST['email'])){$errors[] = "Email address may not contain a new line or a colon";}
$_REQUEST['email'] = trim($_REQUEST['email']);
if(substr_count($_REQUEST['email'],"@") != 1 || stristr($_REQUEST['email']," ")){$errors[] = "Email address is invalid";}else{$exploded_email = explode("@",$_REQUEST['email']);if(empty($exploded_email[0]) || strlen($exploded_email[0]) > 64 || empty($exploded_email[1])){$errors[] = "Email address is invalid";}else{if(substr_count($exploded_email[1],".") == 0){$errors[] = "Email address is invalid";}else{$exploded_domain = explode(".",$exploded_email[1]);if(in_array("",$exploded_domain)){$errors[] = "Email address is invalid";}else{foreach($exploded_domain as $value){if(strlen($value) > 63 || !preg_match('/^[a-z0-9-]+$/i',$value)){$errors[] = "Email address is invalid"; break;}}}}}}
if(!(isset($_SERVER['HTTP_REFERER']) && !empty($_SERVER['HTTP_REFERER']) && stristr($_SERVER['HTTP_REFERER'],$_SERVER['HTTP_HOST']))){$errors[] = "You must enable referrer logging to use the form";}
function recursive_array_check_blank($element_value)
global $set;
if(!is_array($element_value)){if(!empty($element_value)){$set = 1;}}
else
foreach($element_value as $value){if($set){break;} recursive_array_check_blank($value);}
recursive_array_check_blank($_REQUEST);
if(!$set){$errors[] = "You cannot send a blank form";}
unset($set);
if(count($errors)){foreach($errors as $value){print "$value<br>";} exit;}
if(!defined("PHP_EOL")){define("PHP_EOL", strtoupper(substr(PHP_OS,0,3) == "WIN") ? "\r\n" : "\n");}
function build_message($request_input){if(!isset($message_output)){$message_output ="";}if(!is_array($request_input)){$message_output = $request_input;}else{foreach($request_input as $key => $value){if(!empty($value)){if(!is_numeric($key)){$message_output .= str_replace("_"," ",ucfirst($key)).": ".build_message($value).PHP_EOL.PHP_EOL;}else{$message_output .= build_message($value).", ";}}}}return rtrim($message_output,", ");}
$message = build_message($_REQUEST);
$message = $message . PHP_EOL.PHP_EOL."-- ".PHP_EOL."";
$message = stripslashes($message);
$subject = "FormToEmail Comments";
$headers = "From: " . $_REQUEST['email'];
mail($my_email,$subject,$message,$headers);
?>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>Dreamweaver Tutorial - Contact Form</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
</head>
<body bgcolor="#ffffff" text="#000000">
<div>
<center>
<b>Thank you <?php print stripslashes($_REQUEST['name']); ?></b>
<br>Your message has been sent
<p><a href="<?php print $continue; ?>">Click here to continue</a></p>
</center>
</div>
</body>
</html>