What are some common methods for maintaining checkbox selections across multiple pages in PHP?

When dealing with checkbox selections across multiple pages in PHP, one common method is to use sessions to store the selected checkboxes and maintain their state as the user navigates through different pages. By storing the checkbox selections in the session, you can easily retrieve and update them as needed. 

<?php
session_start();

// Check if form is submitted
if ($_SERVER["REQUEST_METHOD"] == "POST") {
    // Update session with selected checkboxes
    $_SESSION['selected_checkboxes'] = $_POST['checkboxes'];
}

// Retrieve selected checkboxes from session
$selected_checkboxes = isset($_SESSION['selected_checkboxes']) ? $_SESSION['selected_checkboxes'] : [];

// Display checkboxes with their state maintained
$checkboxes = ['option1', 'option2', 'option3'];

foreach ($checkboxes as $checkbox) {
    $checked = in_array($checkbox, $selected_checkboxes) ? 'checked' : '';
    echo "<input type='checkbox' name='checkboxes[]' value='$checkbox' $checked> $checkbox <br>";
}
?>

Keywords

sessions cookies form submission $_POST $_GET

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