array_push multidimensional array

Question

I have the following codeline

$return_array = array(
            $count_answers => array(
                    "name" => $domain,
                    "type" => $type,
                    "class" => $class,
                    "ttl" =>$ttl,
                    "data_lenght" => $data_l
                    )
     );

I want to add preference after data length with the following code

array_push($return_array[$count_answers]['preference'], $preference);

Warning: array_push() expects parameter 1 to be array, null given in \functions\functions.php on line 367

why is my first parameter not an array?

Using array_push would be adding another 'row' to your array. All you are doing is adding another attribute to your 'row'. — David Sigley
– David Sigley, Commented Dec 13, 2012 at 11:12

Olaf Dietsche · Accepted Answer · 2012-12-13 11:15:42Z

5

Because there's no element in $return_array indexed by 'preference'. You can append $preference with this instead

$return_array[$count_answers]['preference'][] = $preference;

or initialize with an empty array first

$return_array[$count_answers]['preference'] = array();

If you don't want to add an array of preferences, but just one element 'preference', append it with

$return_array[$count_answers]['preference'] = $preference;

edited Dec 13, 2012 at 11:15

answered Dec 13, 2012 at 11:10

Olaf Dietsche

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Comments

jaudette · Accepted Answer · 2012-12-13 11:09:04Z

2

You don't need to use array_push, you can add the item directly.

$return_array[$count_answers]['preference'] = $preference;

array_push does not allow string as indexes, so your $preference would be at $return_array[$count_answers][0]

On your line 367, your are not providing an array, but an empty element in your current array.

answered Dec 13, 2012 at 11:09

jaudette

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Comments

anuj arora · Accepted Answer · 2012-12-13 11:10:00Z

1

You should correct your code with below.

$return_array = array(
        $count_answers => array(
                "name" => $domain,
                "type" => $type,
                "class" => $class,
                "ttl" =>$ttl,
                "data_lenght" => $data_l
                )
 );

$preference['preference'] = "kkk";

Just change

$return_array[$count_answers]['preference']

with

$return_array[$count_answers]

in array_push, like below

array_push($return_array[$count_answers], $preference);

answered Dec 13, 2012 at 11:10

anuj arora

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Comments

symcbean · Accepted Answer · 2012-12-13 11:22:17Z

0

Using array_push() with a multidimensional array is an oxymoron.

PHP arrays are hierarchical - not multi-dimensional. And array_push adds a numbered element with the specified value. Further, the usage of array_push() is clearly explained in the manual.

I want to add 'preference' after data length with the following code

Why do you want to do it with that code? It's failing and the reason should be obvious.

The code you should you should be using is:

$return_array[$count_answers]['preference']=$preference;

answered Dec 13, 2012 at 11:22

symcbean

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Comments

Pang · Accepted Answer · 2014-07-18 03:28:57Z

0

foreach($arr_data_arrays as $key=>$line_arr) { // do an array looping at first

        $new_arr = array(); // create an array to be included on the second position
        $new_arr[0] = $line_arr;

        array_push($arr_data_arrays[$key][1],$new_arr);//include the whole array on the sec position
};

Easy like that!

edited Jul 18, 2014 at 3:28

Pang

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answered Jul 18, 2014 at 3:18

Rodrigo Serzedello

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