Laravel - 2D Array to CSV string

arrayToCsv.php

function arrayToCsv(array $data) {
    retun collect($data) // turn into collection
        ->map(fn ($i) => collect($i)) // turn next layer into collection
        ->pipe(fn ($c) => $c->prepend($c->first()->keys())->map->values()) //grab keys from firt item in the array and prepend them and return only the array values 
        ->pipe(function($c){ // format fields for CSV: escape " with another ", wrap fields with new lines, commas, and double quotes with a quote
            return $c->map->map(function($i){
                if(Str::contains($i,'"')) {
                    return '"'.str_replace('"', '""', $i).'"';
                } elseif (Str::contains($i,[',',"\n"])){
                    return '"'.$i.'"';
                }
                return $i;
            });
        })
        ->map->implode(',') // join inner items with a comma
        ->implode("\n"); // join outer items with a new line
}