CODEWITHSUNDEEP
phparraysmultidimensional-arrayforeachnested-loops
DanielAttard
DanielAttard

Reputation: 3595

Access parent level key while inside of a nested loop

How do I reference the key of a multidimensional array? Here is the array:

Array
(
[Nov 18, 2011] => Array
    (
        [C] => 3
        [I] => 1
    )
[Nov 22, 2011] => Array
    (
        [C] => 2
    )
)

and here is the foreach loop:

foreach ($array as $date) { 
    foreach ($date as $k => $v) {         
        // how to I reference the value of $billdate here ?
    }            
}

It is easy enough to reference the $k and $v inside the inner foreach loop, but how do I reference the date value contained in the outer foreach loop?

Upvotes: 2

Views: 15857

Answers (3)

Azam Alvi
Azam Alvi

Reputation: 7055

You can get array keys by this way

print_r(array_keys(array_shift($array)));

Upvotes: 0

Ross
Ross

Reputation: 46987

Assuming $billdate is the key of each top-level array:

foreach ($array as $billdate => $date) {
    foreach ($date as $k => $v) {
        var_dump($billdate, $k, $v);
    }
}

Upvotes: 6

nickb
nickb

Reputation: 59699

Assign the key a value (apparently named $billdate) in the outer foreach loop.

foreach( $array as $billdate => $date) { 
    foreach( $date as $k => $v) {         
        echo $billdate; // Prints something like Nov 18, 2011
    }            
}

Upvotes: 7

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