PHP: Check If Any Posted Vars Are Empty - Form: All Fields Required

PHP: check if any posted vars are empty - form: all fields required

Something like this:

// Required field names
$required = array('login', 'password', 'confirm', 'name', 'phone', 'email');

// Loop over field names, make sure each one exists and is not empty
$error = false;
foreach($required as $field) {
  if (empty($_POST[$field])) {
    $error = true;
  }
}

if ($error) {
  echo "All fields are required.";
} else {
  echo "Proceed...";
}

How to check if any fields in a form are empty in php

your form is missing the method...

<form name="registrationform" action="register.php" method="post"> //here

anywyas to check the posted data u can use isset()..

Determine if a variable is set and is not NULL

if(!isset($firstname) || trim($firstname) == '')
{
   echo "You did not fill out the required fields.";
}

How to check if HTML forms are empty or not with PHP

You should use isset check on array - $_POST or $_GET according to your HTML form method.

It should be:

<form method="POST">
    <input name="name" type="text" class="form-control form-control-lg" id="exampleInputName2" placeholder="your name" maxlength="36" value="">
    <input style="margin-top: 10px;" name="email" type="text" class="form-control form-control-lg" id="exampleInputEmail2" placeholder="your email" maxlength="36" value="">
    <button name="mySubmitBtn" type="submit" class="btn btn-default btn-md">subscribe</button>
</form>

PHP:

if (!isset($_POST['name']) || !isset($_POST['email']))
{
    $msg_to_user = '<h1>Fill out the forms</h1>';
} else {
    // process your results
}

I guess, I have answered questions A and B. What about question C - it's up to your architecture. For example, if you want to post form from page to itself (I mean index.php file has a form with action='index.php' or empty action), then you can do it this way (just an example approach, definitely not the best):

if ($_SERVER['REQUEST_METHOD'] == 'POST')
{
    if (!isset($_POST['name']) || !isset($_POST['email']))
    {
        $msg_to_user = '<h1>Fill out the forms</h1>';
    } else {
        // do something in database
        if ($doSomethingInDatabaseSuccess)
            $msg_to_user = '<h1>Succesffully saved!</h1>'; // really? h1? :)
        else
            $msg_to_user = '<h1>Something went wrong!</h1>';
} else {
    $msg_to_user = ''; 
}

<form method="POST">
    <input name="name" type="text" class="form-control form-control-lg" id="exampleInputName2" placeholder="your name" maxlength="36" value="">
    <input style="margin-top: 10px;" name="email" type="text" class="form-control form-control-lg" id="exampleInputEmail2" placeholder="your email" maxlength="36" value="">
    <button name="mySubmitBtn" type="submit" class="btn btn-default btn-md">subscribe</button>
</form>
<p class="result"><?php echo($msg_to_user); ?></p>

Shortcut for checking if all $_POST fields are filled in php

You can use array_filter and compare both counts

if(count(array_filter($_POST))!=count($_POST)){
    echo "Something is empty";
}

php check if any of 30 form fields is empty

Try this:

foreach($_POST as $post)
{
    if( !empty($post) )
    {
        // your code here
    }
}

PHP If statement to test if form fields are empty

You should do it like this:

if(isset($_POST['submit'])) {
    foreach($_POST as $val) {
        if(trim($val) == '' || empty($val)) {
            //empty field, do something
            ...
            header("Location: /add.php?error=empty_fields");
            die();
        }
    }
    //all seems to be ok
    ...
}

To prevent SQL injection, use PDO and you'll forget about it.

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