Warning: array_merge(): Argument #2 is not an array Warning: array_merge(): Argument #1 is not an array

Question

Please take a look to my code below .

    $referenceTable = array();
    $referenceTable['val1'] = array(1, 2);
    $referenceTable['val2'] = 3;
    $referenceTable['val3'] = array(4, 5);

    $testArray = array();

    $testArray = array_merge($testArray, $referenceTable['val1']);
    var_dump($testArray);
    $testArray = array_merge($testArray, $referenceTable['val2']);
    var_dump($testArray);
    $testArray = array_merge($testArray, $referenceTable['val3']);
    var_dump($testArray);

I was trying to work with two arrays as you can see and while trying to merge the empty array with the older ones i am getting the warnings as

Warning: array_merge(): Argument #2 is not an array
Warning: array_merge(): Argument #1 is not an array

The Output which i get is

array(2) { [0]=> int(1) [1]=> int(2) }
NULL
NULL

I am unable to fix this thing , help appreciated .

http://stackoverflow.com/questions/16245377/array-replace-array-merge-session-array-argument-is-not-an-arr?rq=1 — Murad Hasan
– Murad Hasan, Commented May 20, 2016 at 12:51
and after 2nd call of array_merge, $testArray is null, not an array too — splash58
– splash58, Commented May 20, 2016 at 12:52

AbraCadaver · Accepted Answer · 2021-06-23 14:05:49Z

5

All arguments passed to array_merge() need to be arrays and $referenceTable['val2'] is not an array it is integer 3. You can cast it to an array:

$testArray = array_merge($testArray, (array)$referenceTable['val2']);

Or put it in an array [ ]:

$testArray = array_merge($testArray, [ $referenceTable['val2'] ]);

Or if you're actually defining that variable:

$referenceTable['val2'] = array(3);  // or [3]

edited Jun 23, 2021 at 14:05

answered May 20, 2016 at 12:51

AbraCadaver

79.2k7 gold badges75 silver badges91 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Sofiene Djebali · Accepted Answer · 2016-05-20 12:51:22Z

0

$referenceTable['val2'] is an int not an array, declare $referenceTable like this to be array :

PHP

$referenceTable['val2'] = [3];

that should work.

answered May 20, 2016 at 12:51

Sofiene Djebali

4,5481 gold badge24 silver badges28 bronze badges

Comments

Machavity · Accepted Answer · 2016-05-20 12:54:31Z

0

Breaking this down

$testArray = array_merge($testArray, $referenceTable['val2']);

The problem here is that

$referenceTable['val2'] = 3;

3 is not an array. Set it to an array and it works

$referenceTable['val2'] = array(3);

As to why this fails

$testArray = array_merge($testArray, $referenceTable['val3']);

You ran the previous statement, which set $testArray to NULL, which is also not an array

answered May 20, 2016 at 12:54

Machavity♦

31.8k27 gold badges97 silver badges108 bronze badges

1 Comment

Megan Fox Over a year ago

Yeah Thanks i got it this time

Japhet Johnson · Accepted Answer · 2019-05-23 10:40:42Z

0

Ok, I was able to resolve this issue and it occurred when I tried to do composer update. The command did not work and it only corrupted the Service.json file in

/var/www/html/app/storage/meta

So what you need to do is to delete the service.json file and replace it with the new one or you do the composer install command.

The website now runs well on https://www.codemint.net

answered May 23, 2019 at 10:40

Japhet Johnson

93 bronze badges

Comments

Megan Fox · Accepted Answer · 2016-05-20 13:37:54Z

-2

$referenceTable['val2'] is not an array it is integer 3.

You can cast into an array or multiple arrays:

$testArray = array_merge($testArray, array($referenceTable['val2']));

edited May 20, 2016 at 13:37

Megan Fox

4352 gold badges7 silver badges20 bronze badges

answered May 20, 2016 at 13:04

Dhivya Rajagopal

1

Collectives™ on Stack Overflow

Warning: array_merge(): Argument #2 is not an array Warning: array_merge(): Argument #1 is not an array

5 Answers 5

Comments

Comments

1 Comment

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

Comments

Comments

1 Comment

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related