php heredoc原文檔和nowdoc文法

Heredoc原文檔和nowdoc文法使用情境代碼

                Current To-Do List      ';            foreach($parent as $task_id => $todo) {              echo << $todo  EOT;                if (isset($tasks[$task_id])) { // 如果當前id有子任務則遞迴建立菜單                  make_list($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 '
選擇的任務已經標記完成
';          } else {              echo '
選擇的任務不能被標記為完成
';          }      }        $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).'
';    // 這是原文檔, heredoc格式  echo <<點擊檢查框, 標記為完成. (任務本身已經所有的子任務都將不會出現在這個列表)
    EOT;    ?>    

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