How do I access a specifing key in an array using variable variables

Question

My problem is so twisted that I don't even know how to start to explain it.

Lets say that I have several assosiative arrays (not always the same arrays: sometimes I have the products array, sometimes I have the markets array, sometimes I have the segment array, etc...). $values is the only array I always get!

$values = array ("0" => "1", "4" => "2", "5" => "3");
$products = array ("0" => "1", "1" => "1", "2" => "2", "3" => "1", "4" => "2", "5" => "3");
$markets =  array ("0" => "1",  "3" => "1", "4" => "2", "5" => "3");
...

I want to build an array with the values of each of the arrays I get, with the values matching the keys. Something like

$myArray = array ("0" => array ( "values" => "1", "products" => "1", "markets" => "1"),
                  "1" => array ( "products" => "1"),
                  "2" => array ( "products" => "2"),
                  "3" => array ( "products" => "1", "markets" => "1"),
                  "4" => array ( "values" => "2", "products" => "2", "markets" => 2),
                ...);

I've tried something like this:

        switch ($_POST["cpv_type"]) {
            case "pClass":
                $keyValue = $_POST["cpv_type"];
                $objKey   = "this->productClasses";
                break;

            case "pMarket":
                $keyValue = $_POST["cpv_type"];
                $objKey   = "this->markets";
                break;

            case "pSegment":
                $keyValue = $_POST["cpv_type"];
                $objKey   = "this->productSegments";
                break;

            case "pType":
                $keyValue = $_POST["cpv_type"];
                $objKey   = "this->productTypes";
                break;

            default:
                $keyValue = "products";
                $objKey = "this->products";
                break;
        }

And then I do a foreach cicle:

    // all values must be floats
    if(!empty($this->value)){
        foreach ($this->value as $key => &$curVal){
            // if no value has been entered, exclude it and also associated product from validation
            if (strlen(trim($curVal)) == 0) {
                unset($this->value[$key]);
                unset($this->products[$key]);
            } else {
                                        // This validates my variable 
                $curVal =   TMS::checkVar($curVal, "dec", $_SESSION["dico"]->_VALUE_, 100, false);


                                        // Store the value on existing array, associating "hoppValue" to the right key entry!
                $logDetail[$keyValue][${$objKey}[$key]]["hoppValue"] = $curVal;
            }
        }
    }

My problem is in the variable variable: How do I access, for example $this->productTypes[5] using variable variable syntax? I get "null" for all var_dumps of $$objKey, ${$objKey}, ${$objKey}[$key], ${$objKey[$key]}, $$objKey[$key]

Thank you for your help!

you can simple get array in case ` $objKey = $this->productClasses` and used as $objKey[$key] — Naumov
– Naumov, Commented Jun 8, 2016 at 16:52
You are totally right! The answer was so simple and right in front of my eyes. Workdays shouldn't be so long! (Please put your comment into answer so I mark it right!) — Filipe Castanheira
– Filipe Castanheira, Commented Jun 8, 2016 at 16:57

Naumov · Accepted Answer · 2016-06-08 17:00:27Z

1

you can simple get array in case $objKey = $this->productClasses and used as $objKey[$key]. And you can replace $objKey to $arrayClasses or similary for good understending code.

p.s. sorry for my English.

answered Jun 8, 2016 at 17:00

Naumov

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