Get array keys when in argument in PHP

I'm passing some arrays as arguments inside a function. For example:

test($someArray[2][3])开发者_运维知识库;

In that case the function gets the value stored in (2,3) but there is a way to get the keys value (2,3) from inside the function to work with? The function should use the x,y position of the value to do some calculations.

Thanks!

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Not this way, no. If you call test($someArray[2][3]), then PHP will only pass the value, but not any reference where this value comes from. Its cleaner to pass the values separately anyway

function test($x, $y, $value) { /* do something */ }

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Nope, the subscript will be performed before the function receives it.

So if your code is...

$someArray = array(
   2 => array(3 => 'Hello');
);

function test($arg) {

}

test($someArray[2][3]);

Then $arg will be a string Hello. It doesn't know or care about where it came from.

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You're only passing the single element at [2][3]; once inside the function, there is no array. If you need the positions, you should pass the array/element and the indices separately:

test($someArray, 2, 3); // if you might access other elements too

or:

test($someArray[2][3], 2, 3); // if you don't need other elements