PHP中不会显示$ .ajax错误

时间:2014-04-30 04:27:37

标签: php jquery ajax forms error-handling

我不熟悉在AJAX中使用jQuery。我想构建一个简单的表单,在其中一个字段输入不正确时提示用户。

我唯一的要求(目前)是名称必须是“John”。

html(ajaxtutorial.html)

<!DOCTYPE html>
<html>
<head>
    <title>AJAX Form</title>
</head>
<body>

    <form action="ajax/contact.php" method="post" class="ajax">
        <div>
            <input type="text" name="name" placeholder="Your name">
        </div>
        <div>
            <input type="text" name="email" placeholder="Your email">
        </div>
        <div>
        <textarea name="message" placeholder="Your message"></textarea>
        </div>
        <input type="submit" value="Send">
        <div>
    </form>

    <script src="js/jquery-1.11.0.js"></script>
    <script src="js/main.js"></script>
</body>
</html>

jQuery(main.js):

$('form.ajax').on('submit', function() {
    var that = $(this),
        url = that.attr('action'),
        type = that.attr('method'),
        data = {};

    that.find('[name]').each(function(index, value) {
        var that = $(this), //references the inputs within the find function
            name = that.attr('name'),
            value = that.val();

            data[name] = value;
    });

    $.ajax({
        url: url,
        type: type,
        data: data,
        dataType: 'json',
        cache: false,
        success: function(result) {
            if(result.error == true) {
                console.log('Did not type John');
            } 
            else {
                console.log('Typed John');
            }
        }
    }); 
    return false;
});

php(contact.php):

<?php

    $errors = array();
    $form_data = array();

    $name = htmlspecialchars($_POST['name']);
    $email = htmlspecialchars($_POST['email']);
    $message = htmlspecialchars($_POST['message']);

    if ($name != 'John') {
    $errors['name'] = true;
    }

    if (array_key_exists('name',$errors)) {
        $form_data['success'] = true;
        $form_data['error'] = true;
    } elseif (empty($errors)) {
        $form_data['success'] = true;
    }
    echo json_encode($form_data);
?>

我觉得这很简单,但无法解决。我想通过它的类来识别错误(即结果。['class']),以便为每个错误提供唯一的反馈。

感谢您的帮助

1 个答案:

答案 0 :(得分:0)

尝试使用serialize()代替循环,

$('form.ajax').on('submit', function() {
    var that = $(this),
        url = that.attr('action'),
        type = that.attr('method');  

    $.ajax({
        url: url,
        type: type,
        data: that.serialize(),// use form.serialize() here
        dataType: 'json',
        cache: false,
        success: function(result) {
            if(result.error == true) {
                console.log('Did not type John');
            } 
            else {
                console.log('Typed John');
            }
        }
    });        
    return false;    
});

如果出现错误,您也可以在PHP中分配successerror,并尝试使用

if (array_key_exists('name',$errors)) {
    // remove success key from here
    $form_data['error'] = true;// only error
} elseif (empty($errors)) {
    $form_data['success'] = true; // only success
}
echo json_encode($form_data);