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php heredoc原文档和nowdoc语法

巴扎黑

发布： 2016-11-10 13:59:08

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heredoc原文档和nowdoc语法使用场景代码

<!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>
                    <div class="aritcle_card">
                        <a class="aritcle_card_img" href="/ai/1298">
                            <img src="https://img.php.cn/upload/ai_manual/000/000/000/175680203955338.png" alt="法语写作助手">
                        </a>
                        <div class="aritcle_card_info">
                            <a href="/ai/1298">法语写作助手</a>
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                            <div class="">
                                <img src="/static/images/card_xiazai.png" alt="法语写作助手">
                                <span>31</span>
                            </div>
                        </div>
                        <a href="/ai/1298" class="aritcle_card_btn">
                            <span>查看详情</span>
                            <img src="/static/images/cardxiayige-3.png" alt="法语写作助手">
                        </a>
                    </div>
                ';  
        }  
    }  
  
    $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] = $task;  
}  
//echo '<pre class="brush:php;toolbar:false;">'.print_r($tasks,1).'

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'; // 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) EOT; ?>