Accessing a certain element in an array in php

Question

I have an array of products. I would like to put one more product to the array if it doesnt already exist. And get the product inside of the array and increase the item count by 1 if it is already in the array. I have the following code. It doesn`t seem to work. BTW i am new to php, sorry if this is a simple question.

if(!in_array($product, $sc->products)){
   array_push($sc->products,$product);
   }else{
   $key = array_search($product, $sc->products);
   $sc->products[$key]->productCounter++;
}

My shoppingCart class

class shoppingChart extends Model
{
public $products;

function __construct() {
   $this->products = Array();
  }

public function ItemCount(){
   return count($this->products);

}
}

And My Product class

class Product extends Model
{
    public $productCounter=0;

    public function image(){ 
       return $this->hasOne('App\Image');
    }
}

$sc->products[$key]->productCounter++; the dollar sign is wrong in that @apokryfos. I am trying to get the product and increase it`s counter by 1 — rematnarab
– rematnarab, Commented Jun 13, 2017 at 15:45
$sc->products is array of objects I suppose. in_array will always be false. — u_mulder
– u_mulder, Commented Jun 13, 2017 at 15:51
so i can not search for an object in an array of objects using in_array? @u_mulder — rematnarab
– rematnarab, Commented Jun 13, 2017 at 19:58

Tony · Accepted Answer · 2017-06-13 16:13:11Z

I think the problem is because you are searching based on an object here:

array_search($product, $sc->products);
in_array($product, $sc->products);

Consider giving each product and id or some kind of unique identifier to use as a comparison.

You could use a functions like the following to add to the products quantity or to return a product based on its id:

function findProductById($id){

    // LOOP LIST OF PRODUCTS
    foreach ( $products as $product ) {

        // LOOK FOR MATCHING ID
        if ( $id == $product->id ) {

            // RETURN FOUND PRODUCT
            return $product;

        }

    }

    // RETURN FALSE (FAILED TO FIND PRODUCT)    
    return false;

}


function addToQuantityOfProduct($id){

    // GET PRODUCT FROM ID
    $foundProduct = findProductById($id);

    // CHECK IF PRODUCT FOUND
    if($foundProduct !== false){

        // ADD TO PRODUCT COUNTER
        $foundProduct->productCounter++;

        // RETURN TRUE (SUCCESSFULLY UPDATED QUANTITY)
        return true;

    }else{

        // RETURN FALSE (FAILED TO FIND PRODUCT)    
        return false;

    }

}

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