php - how to get contents from iframe cross domain

Question

Is there any way to get contents from iframe via php/jQuery or JavaScript? I want to get url when user click on a link in iFrame and its title also.

Answer 1

From arbitrary URLs? No.

From URLs you control? Yes, in modern browsers.

The document being clicked in should use postMessage to send whatever data you are interested in to the other document which needs to listen for a message event.

top.postMessage({ url: location.href }, "*");

and

window.addEventListener("message", receiveMessage, false);
function receiveMessage(evt) {
    alert(event.data.url);
}