我的一个项目的模板是一个三维数组，就需要遍历输出，这实际上使用foreach就可以很快实现

if ($_GET['on'] == 'on'){
	new_json($template,'./data/m.json');
	echo json_encode($template);
} else {//下为数组遍历输出
	#echo '<plaintext>';
	$data_1 = read_json('./data/m.json');
	#print_r ($data_1);
	foreach($data_1 as $v){
		foreach($v as $v_1){
			foreach($v_1 as $v_2){
				echo $v_2;
			}
		}
	}
}

array:

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [1] => <nav>
                    [2] => <a href="
                    [3] => http://www.ecy.ink
                    [4] => " class="active" target="_blank">
                    [5] => 十织的博客
                    [6] => </a>
                    [7] => <a class="clip"></a>
                    [8] => </nav>
                )

            [1] => Array
                (
                    [1] => <div class="background"><canvas id="startrack" width="1798" height="1413"></canvas><div class="cover"></div></div>
                )

            [2] => Array
                (
                    [1] => <div class="ch intro"><div class="container">
                    [2] => <div class="hello">
                    [3] => <h1 id="slogan">
                    [4] => 每个人<br>都有一个世界<br>安静而孤独</h1><!-- 随机文字 page.js -->
                    [5] => <div class="kong"></div><span class="toppic-line"></span>
                    [6] => <h2><div class="circle"><span></span><!-- 红点 --><span></span><!-- 黄点 --><span></span><!-- 绿点 --></div>
                    [7] => 标题：Hello stars, hello world!
                    [8] => </h2></div></div></div>
                )
.....

使用js把插入HTML插入到页面当中

<script src="./style_script/text.js"></script>
<script>
	let text = load("http://127.0.0.1/hshw/api/m.php?on=");  
	document.write(text);
	console.log(text);
</script>

./style_script/text.js：

function load(name) {
    let xhr = new XMLHttpRequest(),
        okStatus = document.location.protocol === "file:" ? 0 : 200;
    xhr.open('GET', name, false);
    xhr.overrideMimeType("text/html;charset=utf-8");//默认为utf-8
    xhr.send(null);
    return xhr.status === okStatus ? xhr.responseText : null;
}

不过我前端不太好，目前也开始努力学了