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if else statement


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pulling my hair out here, please help.

 

why am i getting a "maybe!" result no matter what my radio box selection is.

i know the variable gets passed to this php succesfully, i tested it with "echo $attend"

then i get the right results

 

but when i use this code, my result is always "maybe"

 

Please hepl

<?php

  $guest = $_REQUEST['guest'];
  $attend = $_REQUEST['attend'];
  $id = $_REQUEST['id'];
  
  include('include/connection.php');
	
  $query="UPDATE data SET guest = '$guest', attend = '$attend' WHERE id = '$id'";
  mysql_query($query) or die ('Error updating database');
  


  if ($attend == "yes")
  {
  echo "yes!";
  }
  else if ($attend == "no")
  {
  echo "no!";
  }
  else
  {
  echo "maybe!";
  }
  
?> 
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here is the form with the radio buttons

 

thanks

 <?php
 $id = $_REQUEST['id'];
 $guest = $_REQUEST['guest'];
 
 ?>
<html>
<head>
    <title>RSVP</title>
    <link rel='stylesheet' type='text/css' href='style.css' />
</head>

<body style="body">
    <ul id="nav">
     <li><a href="home.php?id=<?php echo $id; ?>&guest=<?php echo $guest; ?>">invitation</a></li>
     <li><a href="rsvp.php?id=<?php echo $id; ?>&guest=<?php echo $guest; ?>">rsvp</a></li>
     <li><a href="menu.php?id=<?php echo $id; ?>&guest=<?php echo $guest; ?>">menu</a></li>
     <li><a href="sleep.php?id=<?php echo $id; ?>&guest=<?php echo $guest; ?>">sleep</a></li>
     <li><a href="gifts.php?id=<?php echo $id; ?>&guest=<?php echo $guest; ?>">gifts</a></li>
    </ul>
 

    <div id="rsvp-wrap">
        <h2><?php echo $guest; ?></h2>
        <h2>Will you be joining us on our special day?</h2>
     <form method="post" action="rsvp_update.php">
      <table>
        <input type="hidden" name="guest" value="<?php echo $guest; ?>">
	<input type="hidden" name="id" value="<?php echo $id; ?>">
        
        <input type="radio" name="attend" value="Yes"/>- Yes yes yes! cant wait<br><br>
        <input type="radio" name="attend" value="Maybe"/>- Too early to say, gotta check my diary. but pencil me in<br><br>
        <input type="radio" name="attend" value="sorry"/>- Would love to be there, but wont be able to make it. Let me buy you a present to make up for it<br><br>
        <input type="radio" name="attend" value="No"/>- No. not gonna bother. never realy liked you guys that much anyway<br><br><br>
        <input type="Submit" value="Submit" />
      </table>
     </form>
    </div>
  </body>
</html>

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  • Solution

the values you are using in the form are Yes and No. those are not the same as the values in your comparisons, yes and no. the computer does exactly what your code says. the string 'Yes' is not equal to the string 'yes'.

 

there are very few cases in programming where letter-case doesn't matter, and those would be specifically documented.

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True and false boolean values are case-insensitive in PHP, for example.

 

<?php
$booltrue = TRUE;
$boolfalse = FALSE;
$citrue = true;
$cifalse = false;
$t = $booltrue === $citrue // $t now holds the value true
$f = $boolfalse === $cifalse // $f is also true now
?>
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