[RESOLVED] Multidimensional Arrays

SunsetKnight

This code isn't giving me any errors but I can't get it to do what I want it to :

$assoc = array(
    $one = array("Sales Person" => "Sam Jackson", "Q1" => "$3255", "Q2" => "$3167", "Q3" => 3245, "Q4" => 3943),
    array("Sales Person" => "Jim Brown", "Q1" => "$2580", "Q2" => "$2677", "Q3" => 3225, "Q4" => 3410),
    array("Sales Person" => "John Han****", "Q1" => "$9367", "Q2" => "$9875", "Q3" => 9544, "Q4" => 10255),
);
foreach ($one as $value)
{
	$value = 2000;
}
echo $one['Sales Person'];

The echo prints out "Sam Jackson" and not 2000 I've even tried:

$one['Sales Person'] = 2000;

And that doesn't work either, mind you none of this code is producing any errors.

What would be the correct way to set the value of an array after it's already been created?

Neumy

Hi Sunset,

I see a few errors in your code that is causing problems for you.

1) $one variable: this variable in your code is only setting the first array within the $assoc array (Sam Jackson). I think you can safely remove this $one so you can treat the assoc array more dynamically.

2) Using $ in a string: I'm not 100% sure if this would cause a problem, but I'm concerned enough to mention this here. Because you want a string value dollar sign, this might cause problems because php uses $ as variable names. just use the single quote around these values.

3) Setting $value in a foreach: the foreach function works wonderful for reading valuables, but you have to be careful if you want to use foreach to set values. Instead of using $value = '$2000', you'll have to (1) say which value in the $value array you are changing (eg. $value['Q2'] = '$2000'😉, (2) this would change ALL 'Q2' values in the array (eg. Sam, Jim, and John's Q2 would change), (3) if you do want to change the value, make sure you specify the REAL array (see example below).

Here's a rewritten example of your example that does work better; however, you will need to change things to get the results you want.

$assoc = array(
    array("Sales Person" => "Sam Jackson", "Q1" => '$3255', "Q2" => '$3167', "Q3" => '$3245', "Q4" => '$3943'),
    array("Sales Person" => "Jim Brown",   "Q1" => '$2580', "Q2" => '$2677', "Q3" => '$3225', "Q4" => '$3410'),
    array("Sales Person" => "John Han***", "Q1" => '$9367', "Q2" => '$9875', "Q3" => '$9544', "Q4" => '$10255')
);
foreach ($assoc as $key => $value)
{
	$value['Q2'] = '$2000';
	$assoc[$key]['Q2'] = '$2000';
}
echo "" . $assoc[0]['Sales Person'] ." - ". $assoc[0]['Q2'];

dagon

im not sure what your trying to do, how does the '2000' relate to the array>

SunsetKnight

dagon;10909743 wrote:
im not sure what your trying to do, how does the '2000' relate to the array>

It doesn't, it's an arbitrary number.

SunsetKnight

Thank you that helped me out a lot, I'm understanding it a bit more now. I do have one other question though. I know that you can add values to the end of an array by providing no index, like so:

$myArray = array();
$myArray[] = 'Test';

How would I add an array to my mutli-array ? Would I use this same technique?

$assoc = array(
    array("Sales Person" => "Sam Jackson", "Q1" => '$3255', "Q2" => '$3167', "Q3" => '$3245', "Q4" => '$3943'),
    array("Sales Person" => "Jim Brown",   "Q1" => '$2580', "Q2" => '$2677', "Q3" => '$3225', "Q4" => '$3410'),
    array("Sales Person" => "John Han***", "Q1" => '$9367', "Q2" => '$9875', "Q3" => '$9544', "Q4" => '$10255')
);

$assoc[] = "array("Sales Person" => "New Person", "Q1" => '$9367', "Q2" => '$9875', "Q3" => '$9544', "Q4" => '$10255')";

With that code I get this browser error:

Parse error: parse error in filename.php on line 29

Line 29 is the above $assoc[] = "array...

dagon

$assoc[] = array("Sales Person" => "New Person", "Q1" => '$9367', "Q2" => '$9875', "Q3" => '$9544', "Q4" => '$10255');

SunsetKnight

Doh! :o I had it like that and I was getting an error, I thought it was that line so I put quotes around it. It seems to be some text that I did not comment out....

Thanks!