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I have this cart object array

 Array
(
    [16] => Array
        (
            [count] => 1
            [data] => CartItem Object
                (
                    [_itemID] => 16
                    [_itemData] => 
                )
        )

    [14] => Array
        (
            [count] => 1
            [data] => CartItem Object
                (
                    [_itemID] => 14
                    [_itemData] => 
                )
        )

    [18] => Array
        (
            [count] => 1
            [data] => CartItem Object
                (
                    [_itemID] => 18
                    [_itemData] => 
                )
        )

    [15] => Array
        (
            [count] => 1
            [data] => CartItem Object
                (
                    [_itemID] => 15
                    [_itemData] => 
                )
        )
)

From this array I want to get these key values 16, 14, 18, 15.

How can I get this ?

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closed as off-topic by Yogesh Suthar, Tomasz Kowalczyk, sasha.sochka, Stephen, pnuts Aug 8 at 23:15

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5 Answers

up vote 4 down vote accepted

array_keys will give the keys of a particular array:

$keys = array_keys($yourArray);
print_r($keys);
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up vote 4 down vote

You can use the array_keys function.

http://php.net/array_keys

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up vote 2 down vote

Also you could do that in a foreach loop

foreach($array as $key=>$nextArray){
    //Process
}
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up vote 1 down vote

To return all the keys of the array use (http://php.net/manual/en/function.array-keys.php):

array_keys($array);
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up vote 0 down vote

Check out the php foreach and array_push documentation that should do what you want.

$numbers = new array();
foreach ($cart as $key => $value) {
    array_push($numbers, $key);
}
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