<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>Current To-Do List</title>
</head>
<body>
<?php
function make_list($parent) {
global $tasks;
echo '<ol>';
foreach($parent as $task_id => $todo) {
echo <<<EOT
<li><input type="checkbox" name="tasks[$task_id]" value="done"> $todo
EOT;
if (isset($tasks[$task_id])) { // 如果当前id有子任务则递归创建菜单
make_list($tasks[$task_id]);
}
echo "</li>";
}
echo '</ol>';
}
$db = mysqli_connect('192.168.31.172' ,'root', 'root', 'phpadvanced');
mysqli_query($db, "set names utf8");
if (($_SERVER['REQUEST_METHOD'] == 'POST') && isset($_POST['tasks']) && is_array($_POST['tasks']) && !empty($_POST['tasks'])) {
$q = 'UPDATE tasks SET date_completed=NOW() WHERE task_id IN (';
foreach($_POST['tasks'] as $task_id => $v) {
$q .= $task_id.', ';
}
$q = substr($q, 0, -2) . ')';
$r = mysqli_query($db, $q);
if(mysqli_affected_rows($db) == count($_POST['tasks'])) {
echo '<p>选择的任务已经标记完成</p>';
} else {
echo '<p>选择的任务不能被标记为完成</p>';
}
}
$q = 'SELECT task_id, parent_id, task FROM tasks WHERE date_completed="0000-00-00 00:00:00" ORDER BY parent_id, date_added ASC';
$r = mysqli_query($db, $q);
$tasks = array();
while (list($task_id, $parent_id, $task) = mysqli_fetch_array($r, MYSQLI_NUM)) {
$tasks[$parent_id][$task_id] = $task;
}
//echo '<pre>'.print_r($tasks,1).'</pre>';
// 这是原文档, heredoc格式
echo <<<EOT
<p>点击检查框, 标记为完成. (任务本身已经所有的子任务都将不会出现在这个列表)</p>
<form action="view_tasks.php" method="post">
EOT;
make_list($tasks[0]); //把包含顶级任务的数组发送给它, 最顶级的parent_id是0
//这是5.3新增的nowdoc语法, 相对于原文档就和单引号对于双引号一样, nowdoc不会解析变量
echo <<<'EOT'
<input name="submit" type="submit" value="更新" />
</form>
EOT;
?>
</body>
</html>
