以下代码最好粘贴到 http://markdown.xiaoshujiang.com 这个在线编辑器来测试,简单地你最好这整个页面的内容全部复制粘贴过去看

无高亮的代码:

```
$a = new A();
$b = $a->test();
echo $b;
$c = [1, 2, 'xx' => 99];
if($d == $c['xx']){
	foreach([1, 2 , 3] as $item){
		echo $item . 'fdfdfd';
	}
}
```

---

PHP演示代码:

```php
$a = new A();
$b = $a->test();
echo $b;
$c = [1, 2, 'xx' => 99];
if($d == $c['xx']){
	foreach([1, 2 , 3] as $item){
		echo $item . 'fdfdfd';
	}
}
```

---

JS演示代码:

```js
//设置分数
function setPoint(isAdd){
	if(isAdd == undefined){
		isAdd = true;
	}

	if(isAdd == true){
		point++;
	}else{
		point--;
	}

	showPoint(point);

	if(isAdd == true && point == 20){
		alert('达到20分了');
	}else if(isAdd == false && point == 0){
		alert('被扣剩0分了~~');
	}
}

//显示分数
function showPoint(point){
	var pointElement = document.getElementById('pointWrap');
	pointElement.innerHTML = point + '分';
}

var point = 10; //备注备注...
```

---

HTML演示代码:

```html
<div>
	content<br/>
	<img src="xxxx"/>
</div>
<script>
var dom = document.getElementById('xxx');
dom.innerHTML = getXXXXHtml();
</script>
```

---

下面的代码并不用```号包住,而是用缩进,只要开头缩进了的都是代码

	var dom = document.getElementById('xxx');
	dom.innerHTML = getXXXXHtml();

一样是无高亮的,我会比较少用这种,都是用```的