这个跳转哪里写的不对呢？

报这个错parse error: syntax error, unexpected '' (t_encapsed_and_whitespace), expecting identifier (t_string) or variable (t_variable) or number (t_num_string)

echo "<script>history.go(-1);location = 'blog3.php?id=$_POST['reid']';</script>";

回复内容：

报这个错parse error: syntax error, unexpected '' (t_encapsed_and_whitespace), expecting identifier (t_string) or variable (t_variable) or number (t_num_string)

echo "<script>history.go(-1);location = 'blog3.php?id=$_POST['reid']';</script>";

echo "<script>history.go(-1);location = 'blog3.php?id=".$_POST['reid']."';</script>";

楼上正确答案。