get first array of a 3 dimensional array

Question

given the following 3 dimensional array as an example:

Array
(
[324] => Array
    (
        [0] => Array
            (
                [workid] => 324
                [wname] => Y quiero llegar a mÃ¡s / Para triunfar en la vÃa
                [recordingid] => 476
                [rname] => Y quiero llegar a mÃ¡s / Para triunfar en la vÃa
                [rsubname] => Fandangos sevillanos
            )

    )

[325] => Array
    (
        [0] => Array
            (
                [workid] => 325
                [wname] => Ya basta
                [recordingid] => 479
                [rname] => Ya basta
                [rsubname] => 
            )

    )

[326] => Array
    (
        [0] => Array
            (
                [workid] => 326
                [wname] => Y sin embargo te quiero
                [recordingid] => 563
                [rname] => Y sin embargo te quiero
                [rsubname] => 
            )

        [1] => Array
            (
                [workid] => 326
                [wname] => Y sin embargo te quiero
                [recordingid] => 562
                [rname] => Y sin embargo te quiero
                [rsubname] => (continuaciÃ³n)
            )

        [2] => Array
            (
                [workid] => 326
                [wname] => Y sin embargo te quiero
                [recordingid] => 478
                [rname] => Y sin embargo te quiero
                [rsubname] => 
            )

    )
)

i want to pick the first array of the 3 dimensional array and assign it to another array, let's call it $arr_first

the outpout of $arr_first should look like this

Array
                (
                    [workid] => 324
                    [wname] => Y quiero llegar a mÃ¡s / Para triunfar en la vÃa
                    [recordingid] => 476
                    [rname] => Y quiero llegar a mÃ¡s / Para triunfar en la vÃa
                    [rsubname] => Fandangos sevillanos
                )

Sure i could loop through and get what i want. But i need to know What is the most elegant and fastest way to achieve this whithout looping the entire array?

EDIT: The array is just an example... it's hard coded. The key values could change. So i need to get the first array independent on id

Yotam Omer · Accepted Answer · 2013-08-21 20:49:08Z

2

Try this: (assuming $old_array is your 3-dim array)

$arr_first = array_merge(array(), reset(reset($old_array))); // merge with empty array to clone
print_r($arr_first);

Using array_shift() instead of reset() will also remove the first element from the array so notice that.

I've used array_merge() since you asked "and assign it to another array", however if you're ok with both arrays being the same one you can drop the array_merge() and stick to:

 $arr_first = reset(reset($old_array));

Check this working fiddle

edited Aug 21, 2013 at 20:49

answered Aug 21, 2013 at 20:18

Yotam Omer

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8 Comments

Marco Over a year ago

same thing, im getting the error: Strict Standards: Only variables should be passed by reference in C:\public_html\songbook\index.php on line 52

Yotam Omer Over a year ago

@Marco which is line 52?

Marco Over a year ago

the error is because i try to enclose two or more functions that deals with an array type of variable, php will return an error..

Marco Over a year ago

tried it, after fixing the php error, and this solution does return the last first array... thanks!!

Yotam Omer Over a year ago

@Marco beware of this.. it will not always work. it will work only if the internal pointer of the inner array is set to the first element

|

iWizard · Accepted Answer · 2013-08-21 20:22:21Z

0

$arr_first = array_shift(array_values($array));

var_dump($arr_first);

This way you can get always first independent on id.

answered Aug 21, 2013 at 20:22

iWizard

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2 Comments

Marco Over a year ago

im getting this error: Strict Standards: Only variables should be passed by reference in C:\public_html\songbook\index.php on line 48

Marco Over a year ago

ok the problem is that when i try to enclose two or more functions that deals with an array type of variable, php will return an error.. That beeing said, this solution returns the first 2 dimensional array.. i want to last array

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