How can one ensure compatibility and proper rendering when using iframes to embed PHP scripts across different browsers and servers?

When embedding PHP scripts using iframes across different browsers and servers, it is important to ensure compatibility by setting the correct headers to prevent caching issues and specifying the content type as HTML. This can be achieved by adding the following PHP code snippet at the beginning of the script: 

header("Cache-Control: no-cache, no-store, must-revalidate");
header("Pragma: no-cache");
header("Expires: 0");
header('Content-Type: text/html');

Keywords

iframes PHP scripts compatibility rendering servers

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