php for loop for creating objects doesnt work

Question

i have this code

for ($x = 0; $x <= count($testas); $x += 2) {

    $object = new stdClass();
    $object->$testas[0] = $x;
    $newArr[] = $object;
    }

echo json_encode($newArr);

everything works well here, but if i chagne $testas array like this:

for ($x = 0; $x <= count($testas); $x += 2) {

    $object = new stdClass();
    $object->$testas[$x] = $x;
    $newArr[] = $object;
    }

echo json_encode($newArr);

it doesnt print out anything. Please help

Thanks

What are you actually trying to do? It's not usual for loop. — Vlad DX
– Vlad DX, Commented Oct 29, 2015 at 9:52
i have an array say like this: $array = array ('a', 'b', 'c', 'd'); And i want it to print a json that it would be like this: [{"a":"d"},{"c":"d"} — Lukas Junokas
– Lukas Junokas, Commented Oct 29, 2015 at 10:03
Why count($testas) (just variable) but $object->$testas[$x] (object property). Are that the same array or not? — Vlad DX
– Vlad DX, Commented Oct 29, 2015 at 10:04
i have an array say like this: $array = array ('a', 'b', 'c', 'd'); And i want it to print a json that it would be like this: [{"a":"d"},{"c":"d"} — Lukas Junokas
– Lukas Junokas, Commented Oct 29, 2015 at 10:05

Vlad DX · Accepted Answer · 2015-10-29 10:12:59Z

1

Looks like that you want. Odd elements become properties, event elements become values of the key-value objects. And that objects are in one array.

It's better for me to wrap variable object field name in curly braces. Just not to be messed up with that.

$testas = array ('a', 'b', 'c', 'd');
$newArr = array();

for ($x = 0; $x < count($testas); $x += 2) {

     $object = new stdClass();
     $object->{$testas[$x]} = $testas[$x + 1];

     $newArr[] = $object;
}

echo json_encode($newArr);

Output is:

[{"a":"b"},{"c":"d"}]

answered Oct 29, 2015 at 10:12

Vlad DX

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2 Comments

Lukas Junokas Over a year ago

i dont know what you did here because i had the same code but i works, thanks

Vlad DX Over a year ago

May be your other code is not the same as mine. You provided just part of your code. Check other code carefully.

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