Forms Data

Submitting data to the same page

• login.php

  ```php <?php // isset() to check if it’s available (posted) if(isset($_POST[‘is_submitted’])){ echo “the form submitted successfully, “ . $_POST[‘is_submitted’] . “
  ”; echo “the username sent successfully, “ . $_POST[‘username’] . “
  ”; echo “the password sent successfully, “ . $_POST[‘password’] . “
  ”; echo ‘$GLOBALS[“_POST”] = $_POST[“username”] = ‘ . $GLOBALS[‘_POST’][‘username’] . “
  ”; }

?>

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## Basic input validating 

```php
<?php
// isset() to check if it's available (posted) 
if(isset($_POST['is_submitted'])){
	$minimum = 4; // minimum username and password length 
	$username = $_POST['username'];
	$password = $_POST['userpass'];

	if (strlen($username) < $minimum or strlen($password) < $minimum)
	{
		echo "Invalid Username or password";
	}
	
	$admins = array('admin', 'root', 'John');
	
	if (!in_array($username, $admins)){
		echo "Sorry, you are not an admin.";
	} else{
		echo "Hello, Admin";
	}
}
?>

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