Vanilla <input type="checkbox" name="ice" value="Vanilla">
 Chocolate <input type="checkbox" name="ice" value="Chocolate">
Strawberry <input type="checkbox" name="ice" value="Strawberry">
   Vanilla <input type="checkbox" name="ice[]" value="Vanilla">
 Chocolate <input type="checkbox" name="ice[]" value="Chocolate">
Strawberry <input type="checkbox" name="ice[]" value="Strawberry">
8am-Noon<input type="radio" name="time" value="1">
Noon-4pm<input type="radio" name="time" value="2" checked="checked">
 4pm-8pm<input type="radio" name="time" value="3">
Vegetables
<select name="veg" size="1">
  <option value="Peas">Peas</option>
  <option value="Beans">Beans</option>
  <option value="Carrots">Carrots</option>
  <option value="Cabbage">Cabbage</option>
  <option value="Broccoli">Broccoli</option>
</select>
Vegetables
<select name="veg" size="5" multiple="multiple">
  <option value="Peas">Peas</option>
  <option value="Beans">Beans</option>
  <option value="Carrots">Carrots</option>
  <option value="Cabbage">Cabbage</option>
  <option value="Broccoli">Broccoli</option>
</select>
<?php
  function sanitizeString($var)
  {
    if (get_magic_quotes_gpc())
      $var = stripslashes($var);
    $var = strip_tags($var);
    $var = htmlentities($var);
    return $var;
  }

  function sanitizeMySQL($connection, $var)
  {
    $var = $connection->real_escape_string($var);
    $var = sanitizeString($var);
    return $var;
  }
?>
<?php // convert.php
  $f = $c = '';

  if (isset($_POST['f'])) $f = sanitizeString($_POST['f']);
  if (isset($_POST['c'])) $c = sanitizeString($_POST['c']);

  if (is_numeric($f))
  {
    $c = intval((5 / 9) * ($f - 32));
    $out = "$f &deg;f equals $c &deg;c";
  }
  elseif(is_numeric($c))
  {
    $f = intval((9 / 5) * $c + 32);
    $out = "$c &deg;c equals $f &deg;f";
  }
  else $out = "";

  echo <<<_END
<html>
  <head>
    <title>Temperature Converter</title>
  </head>
  <body>
    <pre>
      Enter either Fahrenheit or Celsius and click on Convert
        
      <b>$out</b>
      <form method="post" action="convert.php">
        Fahrenheit <input type="text" name="f" size="7">
           Celsius <input type="text" name="c" size="7">
                   <input type="submit" value="Convert">
      </form>
    </pre>
  </body>
</html>
_END;

function sanitizeString($var)
{
  if (get_magic_quotes_gpc())
    $var = stripslashes($var);
    $var = htmlentities($var);
    $var = strip_tags($var);
    return $var;
}
?>
<?php // formtest.php
echo <<<_END
  <html>
    <head>
      <title>Form Test</title>
    </head>
    <body>
    <form method="post" action="formtest.php">
      What is your name?
      <input type="text" name="name">
      <input type="submit">
    </form>
    </body>
  </html>
_END;
?>
<?php // formtest2.php
  if (!empty(($_POST['name']))) $name = $_POST['name'];
  else $name = "(Not Entered)";

  echo <<<_END
  <html>
    <head>
      <title>Form Test</title>
    </head>
    <body>
    Your name is: $name<br>
    <form method="post" action="formtest.php">
      What is your name?
      <input type="text" name="name">
      <input type="submit">
    </form>
    </body>
  </html>
_END;
?>
<form method="post" action="calc.php"><pre>
      Loan Amount <input type="text" name="principle">
Monthly Repayment <input type="text" name="monthly">
  Number of Years <input type="text" name="years" value="25">
    Interest Rate <input type="text" name="rate"  value="6">
                  <input type="submit">
</pre></form>