提交表单后,我想检查数组是否为用户的空警报错误。但是提交表单时出现错误:
PHP
$errors = array_filter($_POST['session']);
if (!empty($errors)) {
foreach ($_POST['session'] as $value) {
$session.=$value.',';
}
$session=substr($session, 0 , -1);
}
Warning: array_filter() expects parameter 1 to be array, null given in C:\inetpub\wwwroot\manage\test_bank\index.php on line 729