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javascript - open php in an iframe and extract the data to a variable

Hey everyone,
I have been working on a project where I need to open a PHP page inside an iframe, and then extract the data from that PHP page into a variable using JavaScript. Can someone guide me on how to achieve this?

To give you a better context, I have a main HTML page where I have included an iframe tag. Inside this iframe, I want to load a PHP page that generates some dynamic content. Now, I want to extract this dynamic content and store it into a JavaScript variable, so that I can manipulate it further.

I have tried using the iframe's `contentWindow` property and the `innerHTML` method to extract the data, but it doesn't seem to work. Maybe I am missing something or there is another approach to achieve this. Any suggestions or code examples would be highly appreciated.

Thanks in advance!

All Replies


Hey folks,
I've encountered a similar situation where I had to extract data from a PHP page loaded in an iframe using JavaScript. Although the previous suggestions are great, I found another approach that worked well for me.

In my case, I utilized the Fetch API to make an HTTP request to the PHP page and retrieve the data directly in the main HTML page without needing to access the iframe's contentWindow. Here's how I did it:

.then(response => response.text())
.then(data => {
var extractedData = data;
console.log(extractedData); // Do whatever you need with the data
.catch(error => {
console.error('Error:', error);

By using the Fetch API, I was able to fetch the content of the PHP page as a response and then process it further in the JavaScript code. This approach eliminates the need for iframe.contentWindow and allows direct access to the PHP page's data.

Remember to provide the correct path to your PHP page in the fetch() function for it to work properly.

I hope this approach proves useful for you. If you have any questions or need further assistance, feel free to ask.


I've faced a similar scenario before, and I was able to extract data from a PHP page loaded in an iframe using JavaScript. Here's how I did it:

First, make sure that the PHP page you are loading in the iframe has a specific ID assigned to the element containing the data you want to extract. For example, let's say the ID is "myDataContainer".

Then, in the JavaScript code within the main HTML page, you can access the iframe's contentWindow using the iframe's ID. Here's an example:

var iframe = document.getElementById("myIframe");
var iframeContent = iframe.contentWindow.document;

Once you have accessed the iframe's content, you can query the necessary element containing the data using the getElementById method. In this case, it would be the "myDataContainer" element. Here's an example of how to extract the data and store it into a JavaScript variable:

var dataContainer = iframeContent.getElementById("myDataContainer");
var extractedData = dataContainer.innerHTML;

Now, the variable `extractedData` should hold the content of the "myDataContainer" element from the loaded PHP page.

Remember to ensure that the PHP page loads within the iframe without any cross-origin issues. Additionally, make sure that both the main HTML page and the PHP page are on the same domain.

I hope this helps! Let me know if you need further clarification or have any other questions.


Hey there,
I had a similar requirement where I needed to extract data from a PHP page loaded within an iframe using JavaScript. In my case, the approach I followed was slightly different, but it worked well for me.

Instead of using the iframe's `contentWindow` property, I utilized the `postMessage` method to communicate between the main HTML page and the PHP page within the iframe.

In the PHP page, I included a JavaScript code snippet that sends the desired data to the parent page using the `postMessage` method. Here's an example code snippet from my PHP page:

var dataToSend = "Some data to be extracted";

// Send the data to the parent page
parent.postMessage(dataToSend, '*');

Now, in the main HTML page, I handled the `message` event listener to capture the data sent from the PHP page. Here's a snippet of how I achieved this:

window.addEventListener('message', function(event) {
// Check if the message is coming from the iframe
if (event.source === iframe.contentWindow) {
var extractedData = event.data;
console.log(extractedData); // Do whatever operation you need with the data
}, false);

By using this approach, I could successfully extract the data sent from the PHP page and perform further operations with it.

Remember to ensure that the PHP page and the main HTML page exist on the same domain to avoid cross-origin communication issues.

I hope this alternative approach helps! Let me know if you have any questions or need further assistance.

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