We may require to store a product along with the user selection of quantity ( or colour ) in a session array. We can use multidimensional array to store more than one attributes of an element. We will use this in our shopping cart script. This way we can add or remove items from out session array. $_SESSION=array_diff($_SESSION,$prod_id) We can remove items from the array by using array_diff() function. We can add elements to it by array_push() function. Next, any where inside the page we can declare the array (if not done before ) before using. Before that we have to start the session by adding this line at the top of the page Let us start with declaring a session array. http_build_query: generate query string using elements to pass through URL.PHP fill up multidimensional associative array - easiest way. PHP use variable to populate associative array. Applying user function to each element of an array Dynamically populate an associative array in PHP.Filtering elements and returning new array based on callback function.usort: Sorting array by using user defined function.unset : Deleting elements of an array by using its key or value.Session Array to maintain data in different pages.Breaking of strings to create array using split command.is_array : To check the variable is array or not.in_array : IN Array to search for elements inside an array.array_map : Using user defined and native function to each element of an array. max Getting the maximum or Minimum value of elements in an array.array_keys : To get array of keys from an array.array_push : Adding element to an Array.array_count_values counting the frequency of values inside an array.Multidimensional array : Creating and displaying. You can simply use the PHP foreach loop to create or populate HTML
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