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PHPzCorrection status：qualified
Teacher's comments：php和js都可以通过下标遍历，也都可以不通过下标
Collection
Collection
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
</head>
<script typet="text/javascript" src="http://libs.baidu.com/jquery/1.9.1/jquery.min.js"></script>
<body>
<?php $arr = [1,2,3,4,5]; ?>
<?php foreach ($arr as $k){?>
<tr>
<td class="td"><? echo $k;echo "</br>"; ?></td>
</tr>
<? } ?>
</body>
<script>
let arr = ['A','B','C','D','E'];
for(let i =0;i<arr.length;i++){
alert(arr[i]);
}
</script>
</html>php遍历直接把遍历内容赋值到如上的$k，可以直接调用，js中for循环循环下标然后通过当前下标调取值