[RESOLVED] Reading Arrays using $_POST

AJArmstron

Hello. I hope this is straight forward question.

I have made a form (using POST method) using php with the following variables:

id[1],id[2]
quantity[1],quantity[2]
retail[1],retail[2]
count and artistsearch.

In another php file I want to read the variables sent to it.

My question is how do you obtain values of the arrays sent to it e.g. id[1] ?

By doing print_r($_POST) I get the following print out:

Array ( [id] => Array ( [1] => 16 [2] => 15 ) [retail] => Array ( [1] => 3.42 [2] => 2.45 ) [quantity] => Array ( [1] => 0 [2] => 0 ) [submit] => Click here to purchase the items shown [count] => 2 [artistsearch] => 2 )

I can read the count and artistsearch variables by using $POST['count'] and $POST['artistsearch]. However, I just cannot work out how to get the values for these arrays!! Please help.

AJArmstron

Hello. I believe I found a good method to get say id[1]:
$_POST[id][$i]

I didn't realise one needed to have both parts of the array in separate square brackets.

bradgrafelman

There are a couple of ways to do it, but based on the data you've given I'm guessing you're processing some sort of shopping cart type of situation?

At any rate, the point is that the three arrays you have - $POST['id'], $POST['quantity'], and $POST['retail'] - have separate sets of data that are related to each other (e.g. $POST['id'][n] relates to $POST['quantity'][n] and $POST['retail'][n], where n is an integer array index). In this situation, I like to process the data like so:

for($i = 0; isset($array1[$i]) && isset($array2[$i]) /* etc. for all arrays */; $i++) {
    // process data from arrays, e.g. $array1[$i] and $array2[$i]
}

Note that the above method assumes that the array indexes start at 0 and don't have any holes in the sequence (e.g. you won't ever have something like 0, 1, 3).

Weedpacket

AJArmstron wrote:
I didn't realise one needed to have both parts of the array in separate square brackets.

It makes more sense when you realise that $_POST['id'] is itself an array; once you look at it like that the question of how you get a particular element out of it becomes obvious - the same way you'd get one out of any other array.