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(WordPress) How to handle multiple instance of “send_to_editor” js function

WordPress built-in media uploader is a great library for uploading media. We can create a upload popup instance for upload media or select media from media library by following way:

After upload done we can get the media URL clicking on “Insert into..” button which actually calls “send_to_editor” function that receives media link as argument. So we can write following code to set image URL in a textbox.

It normally works when you have only one instance like bellow:


But what will happen for following scenario where we have two or more custom field area that needs to upload media and insert it into the texfield or container specified?

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