How can you troubleshoot issues with displaying content in an iframe using PHP?

Issue: If content is not displaying correctly in an iframe using PHP, it could be due to incorrect URL paths, permission issues, or cross-origin resource sharing problems. To troubleshoot, check the URL paths in the iframe src attribute, ensure that the content being loaded has the proper permissions, and consider implementing CORS headers if loading content from a different domain. PHP Code Snippet: 

<iframe src="http://example.com/content-to-display.php"></iframe>

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iframe PHP troubleshooting content display error detection

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