php heredoc原文档和nowdoc语法

Heredoc原文档和nowdoc语法使用场景代码

nbsp;html>  
  
  
      
      
  
  
';  
  
        foreach($parent as $task_id => $todo) {  
            echo  $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 "";  
        }  
  
        echo '';  
    }  
  
    $db = mysqli_connect('192.168.31.172' ,'root', 'root', 'phpadvanced');  
    mysqli_query($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 '
选择的任务已经标记完成
';  
        } else {  
            echo '
选择的任务不能被标记为完成
';  
        }  
    }  
  
    $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] = $task;  
}  
//echo '
'.print_r($tasks,1).'
';  
  
// 这是原文档, heredoc格式  
echo 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)