How can PHP developers ensure cross-browser compatibility when using iframes?

PHP developers can ensure cross-browser compatibility when using iframes by setting the `sandbox` attribute with appropriate values to restrict the iframe's behavior and prevent security vulnerabilities. By specifying the `allow-same-origin` and `allow-scripts` values, developers can ensure that the iframe content can interact with its parent document while maintaining security. This approach helps to mitigate potential risks associated with cross-site scripting attacks. 

<iframe src="https://example.com" sandbox="allow-same-origin allow-scripts"></iframe>

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PHP iframes cross-browser compatibility web development browser testing

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