How sum array values by unique key
- by AndrewSpilak
For example
array (
product1_quantity => 5,
product1_quantity => 1,
product2_quantity => 3,
product2_quantity => 7,
product3_quantity => 2,
)
with result:
product1_quantity - 6,
product2_quantity - 10,
product3_quantity - 2
Thanx!