problem with arrays

[dmikester1]

I having an issue with associative arrays. I created my array called numFromCountries and I defined a bunch of colors. I want to walk through the array and check the number of each country. If the number is from 1-9 I want to assign it a red color, if it is 10-19 I want to assign it a green color, etc. Can I only stick strings into associative arrays? I'm having a problem sticking the defined colors in as a value. Here is the code:

$numFromCountries = array("Russia" => "100", "USA" => "50", "Canada" => "20", "Mexico" => "70", "Latvia" => "4");

$red = ImageColorAllocate($img_file, 255, 0, 0);
$green = imagecolorallocate($img_file, 79, 228, 68);
$blue = imagecolorallocate($img_file, 68, 75, 228);
$purple = ImageColorAllocate($img_file, 192, 26, 178);
$yellow = ImageColorAllocate($img_file, 222, 255, 0);
$orange = ImageColorAllocate($img_file, 255, 144, 0);
$pink = ImageColorAllocate($img_file, 255, 134, 217);
$brown = ImageColorAllocate($img_file, 150, 80, 18);
$gray = ImageColorAllocate($img_file, 150, 150, 150);
$cyan = ImageColorAllocate($img_file, 0, 255, 255);
//$black = ImageColorAllocate($img_file, 0, 0, 0);

foreach($numFromCountries as $key => $val)
{
if($val > 0 && $val < 10)
$colorOfCountries = array($key => $red);

print("key is: ".$colorOfCountries[$key]);
}

[laserlight]

Try a range check such as:

if ($val < 10) {
} elseif ($val < 20) {
} else {
}

[dmikester1]

I'm not having a problem getting into the if loops. I need to assign a color to a country in the array. Thats where it seems to be screwing up. Can I only put strings into arrays?
Mike

[laserlight]

Oh.
$colorOfCountries[$key] = $val;

[dmikester1]

No, I would like to replace the old value of "4" for "Latvia" with the color $red which I had earlier defined. Does that make sense?
Mike

[laserlight]

That's just the same:
$numFromCountries[$key] = $color;

[toplay]

Associate array keys should not start with a number. The following is a quote from the PHP manual:

The keys in the [$_SESSION] associative array are subject to the same limitations as regular variable names in PHP, i.e. they cannot start with a number and must start with a letter or underscore.

It's specifically talking about the session superglobal array variable, but I think it applies in general.

I would try a different approach. Maybe something like this:

$colors = array(
                         'red'    => array('R' => 255, 'G' => 0, 'B' => 0),
                         'green'  => array('R' => 79, 'G' => 228, 'B' => 68),
                         'blue'   => array('R' => 68, 'G' => 75, 'B' => 228),
                         'purple' => array('R' => 192, 'G' => 26, 'B' => 178)
                         // etc., etc., etc.
                        );

$countryColors = array('Russia' => 'red', 'USA' => 'blue', 'Canada' => 'green'); // etc., etc.

// When you want a specific country color do:

$color = ImageColorAllocate($img_file, $colors[$countryColors['Russia']]['R'],
                                       $colors[$countryColors['Russia']]['G'], 
                                       $colors[$countryColors['Russia']]['B']);

foreach($countryColors as $country => $color) {

echo "For country: $country the color is: $color <br>";

// Setting a country color inside this for loop:
$countryColor = ImageColorAllocate($img_file, 
                                           $colors[$countryColors[$country]]['R'], 
                                           $colors[$countryColors[$country]]['G'], 
                                           $colors[$countryColors[$country]]['B']);

// Use $countryColor here if desired

}

Not tested - so it might have syntax errors.

hth.

[dmikester1]

Thanks for the help Toplay. However, I have one problem, I need to have each country associated with a certain number right off the bat, 100, 20, 50, 70, etc. Then I will attach colors to the countries depending on what their number is. Is there a way I can attach an arbitrary number to a country with or without arrays?
Mike

[laserlight]

Associate array keys should not start with a number.

They should not (to avoid confusion), but they can. The problem with session variables is a different case.

[toplay]

dmikester1 wrote:

Thanks for the help Toplay. However, I have one problem, I need to have each country associated with a certain number right off the bat, 100, 20, 50, 70, etc. Then I will attach colors to the countries depending on what their number is. Is there a way I can attach an arbitrary number to a country with or without arrays?
Mike

laserlight has already given you the answer.

Within your foreach loop, if you want to replace the existing number 4 with the color, then do:

$numFromCountries[$key] = $red;

If you want to create a new array where the index/key is the name of the country and the value is the color, then do:

$colorOfCountries[$key] = $red;

If you want to create a new array where the index/key is the number value of the country (i.e. 4), and the value being the color, then do:

$colorOfCountries[$val] = $red;

hth.