PHP 中的 301 重定向

Question

I keep hearing about a 301 redirect. Is it the same as doing this?:

<?php
  header("Location: https://www.example.com/");
  exit();
?>

What is the difference between doing this or redirecting in a different way. Thanks in advance.

Answer 1

According to the documentation ( https://www.php.net/manual/en/function.header.php ) header('Location: ...') returns with a status code of 302 which means 'moved temporarily'. If you would like to tell the browser that this is a permanent redirect, use a 301 status code, like this:

header("Location: https://www.example.com/", true, 301);