r task subtask with unique batch number in PHP

 <?php

// Define tasks and subtasks with unique batch numbers

$tasks = array(

    array(

        'batch_number' => 'B001',

        'task' => 'Task 1',

        'subtasks' => array(

            array('subtask_number' => 'B001-S001', 'subtask' => 'Subtask 1.1'),

            array('subtask_number' => 'B001-S002', 'subtask' => 'Subtask 1.2'),

            array('subtask_number' => 'B001-S003', 'subtask' => 'Subtask 1.3')

        )

    ),

    array(

        'batch_number' => 'B002',

        'task' => 'Task 2',

        'subtasks' => array(

            array('subtask_number' => 'B002-S001', 'subtask' => 'Subtask 2.1'),

            array('subtask_number' => 'B002-S002', 'subtask' => 'Subtask 2.2')

        )

    )

);

// Display tasks and subtasks with batch numbers

foreach ($tasks as $task) {

    echo $task['task'] . " (Batch Number: " . $task['batch_number'] . "):<br/>";

    foreach ($task['subtasks'] as $subtask) {

        echo "- " . $subtask['subtask'] . " (Batch Number: " . $subtask['subtask_number'] . ")<br/>";

    }

    echo "<br/>";

}

?>