The code in this download folder contains 3 different methods which enable you to use jQuery with PHP to change your image on scroll or using any other condition.
The 2nd solution uses hard coded image URL’s within the jQuery to change the image and then add it back using pure jQuery.
The 1st & 3rd code snippets use the wp_localize_script() function which enables the efficient usage of PHP, in this case, a image from different sources,
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