经测试代码如下：
<?PHP
/**
* 验证表单数据
*
* @param
* @arrange (编程之家) jb51.cc
**/
function VerifyForm(&$values,&$errors)
{
// Do all necessary form verification
if (strlen($values['name']) < 3)
$errors['name'] = 'Name too short';
elseif (strlen($values['name']) > 50)
$errors['name'] = 'Name too long';
// Needs better checking ;)
if (!ereg('.*@.*\..{2,4}',$values['email']))
$errors['email'] = 'Email address invalid';
if (strlen($values['text']) == 0)
$errors['text'] = 'Text required';
return (count($errors) == 0);
}
function displayForm($values,$errors)
{
?>
<html>
<head>
<title>Yadda yadda</title>
<style>
TD.error
{
color: red;
font-weight: bold;
}
</style>
</head>
<body>
<?PHP
if (count($errors) > 0)
echo <p>There were some errors in your submitted form,please correct them and try again.</p>;
?>
<form action=<?= $_SERVER['PHP_SELF'] ?> method=POST>
<table>
<tr>
<td>Name:</td>
<td><input type=text size=30 name=name value=<?= htmlentities($values['name']) ?>/>
<td class=error><?= $errors['name'] ?></td>
</tr>
<tr>
<td>Email:</td>
<td><input type=text size=30 name=email value=<?= htmlentities($values['email']) ?>/>
<td class=error><?= $errors['email'] ?></td>
</tr>
<tr>
<td valign=top>Text:</td>
<td>
<textarea name=text cols=30 rows=6><?= htmlentities($values['text']) ?></textarea>
</td>
<td class=error><?= $errors['text'] ?></td>
</tr>
<tr><td colspan=2 align=center><input type=submit value=Submit></tr>
</table>
</form>
</body>
</html>
<?PHP
}
function ProcessForm($values)
{
mail('foo@bar.com','Form test',$values['text'],From: \{$values['name']}\ <{$values['email']}>);
// Replace with actual page or redirect :P
echo <html><head><title>Thank you!</title></head><body>Thank you!</body></html>;
}
if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
$formValues = $_POST;
$formErrors = array();
if (!VerifyForm($formValues,$formErrors))
displayForm($formValues,$formErrors);
else
ProcessForm($formValues);
}
else
displayForm(null,null);
/*** 来自：编程之家 jb51.cc（jb51.cc） ***/
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