Display similar-products(by name) of product that the page is deactivate

[PrestaUser00]

Hi community,

 

I have a function in one of my controller that return products by name. My function work well. She execute a sql query with the key word "%LIKE% and return all the similar product in a variable that i called "$contents". Now the problem is, how to call this function in a template (for exemple error.tpl). After i call the function, i want to extract from the url the name of the product and put this in the parametre of the function (Like this (returnproductbyname(t-shirt black).

 

Can someone tell me the syntax to do this ?