How can PHP developers ensure compatibility between file paths and HTTP requests when using header() function?

PHP developers can ensure compatibility between file paths and HTTP requests when using the header() function by using the $_SERVER['DOCUMENT_ROOT'] variable to get the absolute path of the web server's root directory. This ensures that the file paths are correctly referenced in the HTTP requests. 

$document_root = $_SERVER['DOCUMENT_ROOT'];
$file_path = $document_root . '/path/to/file';

header("Location: http://example.com/{$file_path}");

Keywords

PHP header() file paths HTTP requests compatibility

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