@barry If you use an IDE like PhpStorm, switch PHP language level to 5.3 then use its built-in tool-tip bulb to automatically convert 5.4 arrays to 5.3 and to spot all 5.4 features like anonymous functions.
I didn’t include the search box in order to keep the tutorial at a reasonable length for easy assimilation.
You might want to check out the link below for the search box and row styling
All the best.