טיפול במקרים של רשימה ריקה

<?php
// Read three task descriptions
$task1 = trim(fgets(STDIN));
$task2 = trim(fgets(STDIN));
$task3 = trim(fgets(STDIN));

// Read the new task to add
$newTask = trim(fgets(STDIN));

// Read the index of the task to mark as complete
$completeIndex = (int)trim(fgets(STDIN));

// Read the index of the task to remove
$removeIndex = (int)trim(fgets(STDIN));

// Read the filter type (completed or pending)
$filter = trim(fgets(STDIN));

// Create a $todos array containing three task arrays
// Each task should be an associative array with "task" and "completed" keys
$todos = [
    ["task" => $task1, "completed" => false],
    ["task" => $task2, "completed" => false],
    ["task" => $task3, "completed" => false]
];

// Add the new task to the end of the array
$todos[] = ["task" => $newTask, "completed" => false];

// Mark the task at the specified index as complete
$todos[$completeIndex]["completed"] = true;

// Remove the task at the specified removal index
array_splice($todos, $removeIndex, 1);

// Loop through the array and print each task that matches the filter
foreach ($todos as $todo) {
    if ($filter === "completed" && $todo["completed"]) {
        echo "- " . $todo["task"] . " (Done)\n";
    } elseif ($filter === "pending" && !$todo["completed"]) {
        echo "- " . $todo["task"] . " (Pending)\n";
    }
}
?>