似乎无法附加到PHP中的数组

Question

理论上,这个简单的脚本应该检查表单是否有错误,然后打印它找到的任何错误.

formValidate函数接受一个表单数组,表单中的每个字段都有一个经过验证的值.该字段还有一个错误键,其值为空数组.我试图将我发现的任何错误追加到特定字段的错误数组中.然后,当我完成后,我返回表单数组.

我稍后打印出字段的所有错误.不幸的是,错误从未出现过.

我已经在这个问题上突破了好几个小时了,我不知道为什么我的生活会弄清楚为什么我脚本中的表单错误没有出现.

任何帮助将不胜感激!

# get value from array
function array_get(array $array, $key, $default = null)
{
    return (array_key_exists($key, $array)) ? $array[$key] : $default;
}

# get string value from array
function array_get_string(array $array, $key, $default = '', $trim = true)
{
    $val = array_get($array, $key);
    if (is_string($val)) {
        return ($trim) ? trim($val) : $val;
    }
    return $default;
}

function validateForm($form)
{
    // validateField each field
    foreach ($form as $field)
    {
        foreach ($field['validation'] as $validate)
        {
            switch($validate)
            {
                case 'email':
                    if(!filter_var($field['value'], FILTER_VALIDATE_EMAIL)) {
                        $field['errors'][] = $field['value'] . ' is an invalid email address.';
                    }
                break;
                case 'number':
                    if(!preg_match('/^[0-9 ]+$/', $field['value'])) {
                        $field['errors'][] = $field['value'] . ' is an invalid number.';
                    }
                break;
                case 'alpha':
                    if(!preg_match('/^[a-zA-Z ]+$/', $field['value'])) {
                        $field['errors'][] = $field['value'] . ' contains invalid characters. This field only accepts letters and spaces.';
                    }
                break;
            }
        }
    }

    return $form;
}

// $post = filter_input_array( INPUT_POST, FILTER_SANITIZE_SPECIAL_CHARS );
$post = $_POST;
$ajax = array_get_string($post, "request_method") == 'ajax';

# select data that needs validation
$form = array(
    'fullname' => array(
        'value' => array_get_string($post, "full-name"),
        'validation' => array('alpha', 'required'),
        'errors' => array(),
    ),
    'emailaddress' => array(
        'value' => array_get_string($post, "email-address"),
        'validation' => array('email'),
        'errors' => array(),
    ),
    'activites' => array(
        'value' => array_get_string($post, "activites"),
        'validation' => array('default'),
        'errors' => array(),
    ),
    'country' => array(
        'value' => array_get_string($post, "country"),
        'validation' => array('default'),
        'errors' => array(),
    ),
    'contactpreference' => array(
        'value' => array_get_string($post, "contact-preference"),
        'validation' => array('default'),
        'errors' => array(),
    ),
    'message' => array(
        'value' => array_get_string($post, "message"),
        'validation' => array('alpha'),
        'errors' => array(),
    ),
);

// validate the form
$form = validateForm($form);

foreach ($form as $field)
{
    foreach ($field['errors'] as $error)
    {
        echo $error . '<br />';
    }
}

Answer 1

foreach创建数组的副本并对其进行处理.如果您需要对原始数组进行更改,请通过引用传递它,如下所示:

foreach($form as &$field) {
    ...
}