我有一个验证电子邮件地址的表单,我希望能够将echo '<p class="error">Please enter a valid email address!</p>';
放在网页的任何位置而无需将验证过程放在html中吗?
或者我应该在HTML表单中包含验证过程吗?
这是php代码。
if (preg_match ('/^[\w.-]+@[\w.-]+\.[A-Za-z]{2,6}$/', $_POST['email'])) {
$email = mysqli_real_escape_string($mysqli, strip_tags($_POST['email']));
} else {
echo '<p class="error">Please enter a valid email address!</p>';
}
答案 0 :(得分:2)
略有不同
if (preg_match ('/^[\w.-]+@[\w.-]+\.[A-Za-z]{2,6}$/', $_POST['email'])) {
$email = mysqli_real_escape_string($mysqli, strip_tags($_POST['email']));
} else {
$error = 'Please enter a valid email address!';
}
现在您可以在页面的任何位置打印$ error
好的,这样做:
if (preg_match ('/^[\w.-]+@[\w.-]+\.[A-Za-z]{2,6}$/', $_POST['email'])) {
$email = mysqli_real_escape_string($mysqli, strip_tags($_POST['email']));
echo "valid ";
} else {
$error = 'Please enter a valid email address!';
echo "invalid ";
}
echo $error;
exit;
现在会说什么?
另一个例子:
<?php
$error="";
if (preg_match ('/^[\w.-]+@[\w.-]+\.[A-Za-z]{2,6}$/', $_POST['email'])) {
$email = mysqli_real_escape_string($mysqli, strip_tags($_POST['email']));
} else {
$error = 'Please enter a valid email address!';
$email=htmlspecialchars($email);
}
?>
<html>
<form>
<?php if ($error): ?>
<p class="error"><?php echo $error?></p>
<?php endif ?>
Enter email: <input type="text" name="email" value="<?php echo $email?>">
<input type="submit">
</form>
</html>
现在有效吗?