for循环中出现意外的T_STRING

Here is my code:

这是我的代码:

$today = date('Y-m-d');

for ($i = 1; $i <= 10; $i ++){
$var_b[$i]  = date('Y-m-d', strtotime('-' . $i .' day', strtotime($today)));
$var2_b[$i]_name = date('d', strtotime($var_b[$i]));
$today = date('Y-m