How to integrate an image haystack replacement technique I'd like to use a tokenised image replacement technique which is commonly adopted in ExpressionEngine. This is where the author can add image tokens such as {image_1}, {image_2} etc into their content, and these get replaced by images defined in a matrix in the same publish form (with additional information such as image size etc). What technique can I use to achieve this?
This generally isn't necessary in Craft. You can use a Matrix Field and combination of Matrix Blocks to build advanced content with flexible images. This is really the best way to go if it's an option.