CODEWITHSUNDEEP
phparrays
Mr. Ajin
Mr. Ajin

Reputation: 335

PHP array_combine with $_GET does not return all array value

I have a form which submits a status and a id as arrays to an update.php. Below is the submitting form input and the sent URL

<? echo"<input type='hidden' name='status[]' value='$status' />"; ?>
<? echo"<input type='hidden' name='id[]' value='$id' />"; ?>

update_pnr.php?status%5B%5D=0&id%5B%5D=4&status%5B%5D=0&id%5B%5D=5

The PHP which should update the incoming information is:

$newarr = array_combine($_GET['status'],$_GET['id']);
foreach($newarr as $index => $value){
    echo 'index: ' . $index . 'Value: ' . $value . '<br>';
}

I was expecting: 

0 Value: 4
0 Value: 5

But the first line is ignored, I receive only the last line. Why is that ?

Upvotes: 0

Views: 235

Answers (2)

Awlad Liton
Awlad Liton

Reputation: 9351

As far doc array_combine

Creates an array by using the values from the keys array as keys and the values from the values array as the corresponding values.

http://php.net/manual/en/function.array-combine.php

First parameter array's value is use as keys and second parameter array's value use as values

$a = array('green', 'red', 'yellow');
$b = array('avocado', 'apple', 'banana');
$c = array_combine($a, $b);

print_r($c);

Output:

Array
(
    [green]  => avocado
    [red]    => apple
    [yellow] => banana
)

Your scenario is:

Your array $_GET['status']:

Array(
            [0] => 0
            [1] => 0
        )

array $_GET['id']:

Array
        (
            [0] => 4
            [1] => 5
        )

After combine it becomes:

Array
(
    [0] => 5
)

Because array status has same value twice which are the keys of combined array. Since key is unique it overwrite with the last value:

$newarr[0] => 4 and then $newarr[0] => 5

$newarr[0] => 4 overwrite by

$newarr[0] => 5

and $newarr has only one key and value.

Live analysis

Upvotes: 2

codeneuss
codeneuss

Reputation: 905

A possible workaround:

foreach($_GET['status'] as $key => $val)
   echo $val . 'Value: ' . $_GET['id'][$key];

Upvotes: 1

Related Questions