How common is the method of creating arrays from HTML form data in PHP?

Creating arrays from HTML form data in PHP is a common practice, especially when dealing with forms that contain multiple inputs with similar names (e.g., checkboxes, multiple select options). This method allows you to easily handle and process the submitted data as arrays in your PHP script. To create arrays from form data, you can use the square bracket notation in the input field names to group related inputs together. 

<form method="post">
    <input type="text" name="user[name]">
    <input type="email" name="user[email]">
    <input type="checkbox" name="interests[]" value="coding">
    <input type="checkbox" name="interests[]" value="design">
    <input type="checkbox" name="interests[]" value="music">
    <input type="submit" name="submit" value="Submit">
</form>

<?php
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $userData = $_POST['user'];
    $interests = $_POST['interests'];
    
    echo "User Name: " . $userData['name'] . "<br>";
    echo "User Email: " . $userData['email'] . "<br>";
    
    if (!empty($interests)) {
        echo "Interests: " . implode(", ", $interests);
    }
}
?>

Keywords

arrays HTML form data PHP method creation

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