What are the advantages of using array notation for form elements in PHP and how does it simplify data processing?

Using array notation for form elements in PHP allows you to group related form inputs together, making it easier to process data in a structured way. This simplifies data processing by allowing you to loop through the array of form elements and perform operations on each element without having to handle them individually. 

<form method="post">
  <input type="text" name="user[name]">
  <input type="text" name="user[email]">
  <input type="text" name="user[phone]">
  <input type="submit" value="Submit">
</form>

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
  $userData = $_POST['user'];
  
  foreach ($userData as $key => $value) {
    echo $key . ": " . $value . "<br>";
  }
}
?>

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