How to join single array into multidimensional array in PHP?

Question

So lets say, i have First Array with values like this

First Array :

$first : [Array
(
    [0] => CreationDate
    [1] => OrderNumber
    [2] => OrderDate
    [3] => InvoiceNumber
)

and Second Array with value like this : $Second : [Array

(
    [0] => 2011-08-09
    [1] => 123123
    [2] => 2011-08-09
    [3] => XXAXXA
)

what i want is to get output like this :

$Join : [Array
(
    [CreationDate] => 2011-08-09
    [OrderNumber] => 123123
    [OrderDate] => 2011-08-09
    [InvoiceNumber] => XXAXXA

)

*noted, i already using this nested foreach to get the result

$join = array();

    foreach ($names as $key => $value) {
    foreach ($values as $key2) {      
        $join[][$value] = $key2;
    }

}

but it return Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 29364224 bytes)

so if u guys have more efficient method, i open my mind to know it Thanks u guys

The fourth bird · Accepted Answer · 2018-07-22 10:51:37Z

1

You could use array_combine and use the first array for the keys and the second array for the values:

$a = [
    0 => "CreationDate",
    1 => "OrderNumber",
    2 => "OrderDate",
    3 => "InvoiceNumber"
];
$b = [
    0 => "2011-08-09",
    1 => "123123",
    2 => "2011-08-09",
    3 => "XXAXXA"

];

print_r(array_combine($a, $b));

Output:

Array
(
    [CreationDate] => 2011-08-09
    [OrderNumber] => 123123
    [OrderDate] => 2011-08-09
    [InvoiceNumber] => XXAXXA
)

Demo

answered Jul 22, 2018 at 10:51

The fourth bird

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3 Comments

darikehidupan Over a year ago

yess, it worked, but i have 672 lines in $First and $Second Array, both of them is 672 lines, when i use combine it stuck, it only combine 22 lines, any suggesttion ?

The fourth bird Over a year ago

So after 22 lines you get the Fatal error? Dit you try to increase the memory a bit? Perhaps there is some very inefficient looping?

IMSoP Over a year ago

@hope9 We can only work with the details you give in your question. If your actual array is different, you need to update the question with this details. Are all 672 items in the first array unique?

attempt0 · Accepted Answer · 2018-07-22 11:55:20Z

0

$join = array();

foreach ($names as $key => $value) {
    $join[$value] = $values[$key];
}

which $names and $values are your arrays.

Edit:

Since you run out of memory, I would recommend you to unset the original array.

$join = array();

foreach ($First as $key => $value) {
    $join[$value] = $Second[$key];
    unset($First[$key]);
    unset($Second[$key]);
}

and use array_keys($join) to get the first array and array_values($join) to get the second array.

edited Jul 22, 2018 at 11:55

answered Jul 22, 2018 at 10:41

attempt0

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1 Comment

darikehidupan Over a year ago

it work, but only few lines, actually i got 672 line in $First array and $Second array

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