Import Products with Pixel

What is the script to add to Facebook pixel to let it import items from the website?
I got this in the debugger tool:


Errors
A required field is missing: id

A required field is missing: image_link

A required field is missing: title

A required field is missing: price

A required field is missing: availability

A required field is missing: description

A required field is missing: link

What is the exact code I have to add to pixel?
Or shall I have to add this code to each product page?
Can someone give me a sample?

are you using shopify? where are you seeing this error - need more info

Custom site on php