使用下面给出的这一行，而不是header()函数。

echo "<script>window.top.location = 'https://apps.facebook.com/yourappnamespace/';</script>";

这就是解决办法!!

FB.Event.subscribe('edge.create', function(response) {
    window.top.location.href = 'url';
});

这是唯一适用于facebook应用的方法!

I came across this issue when running a wordpress web site. I tried all sorts of things to fix it and wasn't sure how, ultimately the issue was because I was using DNS forwarding with masking, and the links to external sites were not being addressed properly. i.e. my site was hosted at http://123.456.789/index.html but was masked to run at http://somewebSite.com/index.html. When i entered http://123.456.789/index.html in the browser clicking on those same links resulted in no X-frame-origins issues in the JS console, but running http://somewebSite.com/index.html did. In order to properly mask you must add your host's DNS name servers to your domain service, i.e. godaddy.com should have name servers of example, ns1.digitalocean.com, ns2.digitalocean.com, ns3.digitalocean.com, if you were using digitalocean.com as your hosting service.

X-Frame-Options Allow-From https://..。如果使用Content-Security-Policy报头，则会被替换(并被忽略)。

这里是完整的参考资料:https://content-security-policy.com/

虽然没有提及，但在某些情况下可以有所帮助:

var xhr = new XMLHttpRequest();
xhr.onreadystatechange = function() {
    if (xhr.readyState !== 4) return;
    if (xhr.status === 200) {
        var doc = iframe.contentWindow.document;
        doc.open();
        doc.write(xhr.responseText);
        doc.close();
    }
}
xhr.open('GET', url, true);
xhr.send(null);

使用下面给出的这一行，而不是header()函数。

echo "<script>window.top.location = 'https://apps.facebook.com/yourappnamespace/';</script>";