我有一个表单，提交时会检查这个查询->
if(isset($_POST['update']) && !empty($_POST['name']) && !empty($_POST['reg_name']))
如果必填字段没有填写，我想回显一条消息"请填写所有必填字段"。
简而言之，它应该突出显示未填充的字段名称。
完整代码：
include ('database/abcd.php');
if ($con->connect_error)
{
die("Connection failed: " . $con->connect_error);
}
if(isset($_POST['update']))
{
$error = array();
if(empty($_POST['name']))
$error[] = 'Please fill name field';
if(empty($_POST['reg_name']))
$error[] = 'Pleae fill reg_name field';
if(count($error) < 1)
{
$name = $_POST['name'];
$reg_name = $_POST['reg_name'];
$established = $_POST['established'];
$industry = $_POST['industry'];
$about = $_POST['about'];
$website = $_POST['website'];
$mail = $_POST['mail'];
$phone = $_POST['phone'];
$address = $_POST['address'];
$city = $_POST['city'];
$facebook = $_POST['facebook'];
$wiki = $_POST['wiki'];
$twitter = $_POST['twitter'];
$google = $_POST['google'];
$member_username = $_SESSION['username'];
$process="INSERT INTO notifications (member_username, process, icon, class) VALUES ('$_POST[member_username]','$_POST[process]','$_POST[icon]','$_POST[class]')";
if (!mysqli_query($con,$process))
{
die('Error: ' . mysqli_error($con));
}
$sql = "UPDATE `company_meta` SET `name` = '$name', reg_name = '$reg_name', wiki = '$wiki', established = '$established', industry = '$industry', about = '$about', website = '$website', mail = '$mail', phone = '$phone', address = '$address', city = '$city', facebook = '$facebook', twitter = '$twitter', google = '$google' WHERE `member_username` = '$member_username'";
if ($con->query($sql))
{
header('Location: edit.php');
}
}
else
{
$errors = implode(',' $error);
echo $errors;
}
$con->close();
}
我认为您传入的name或reg_name是先检查的。可能是name或regname可以包含空白，这样它就不会显示消息，否则上面的代码工作正常。。
if(isset($_POST['update'])) // This first check whether it is an update call
{
$error = array(); // Here we initialize an array so that we can put the messages in it.
if(empty($_POST['name'])) // If the name field is empty, push a message in $error array.
$error[] = 'Please fill name field';
if(empty($_POST['reg_name'])) // Same as above field
$error[] = 'Pleae fill reg_name field';
if(count($error) < 1) // Now this checks if the $error array has no value. If it has value it means that either or both of the above fields are empty and the else block will be executed.
{
// Submit your form
}
else
{
$errors = implode(',' $error);
echo $errors;
}
}
else
{
// Update not triggered.
}