How can PHP developers ensure that users stay on the same page after being redirected to an error page?

When users are redirected to an error page, PHP developers can ensure that they stay on the same page by passing the current page URL as a parameter in the redirect header. This way, the error page can include a link back to the original page for users to navigate back easily. 

```php
// Get the current page URL
$current_page = $_SERVER['REQUEST_URI'];

// Redirect to the error page with the current page URL as a parameter
header("Location: error_page.php?redirected_from=$current_page");
exit;
```
In the error_page.php file, you can use the `redirected_from` parameter to create a link back to the original page.

Keywords

PHP header() redirect error handling session management

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