Creating Associative Array in PHP

Question

I have a multidimensional array.

$shop = array( 
              array("appn1", "pub1" ,"pub2" , "pub3"),
              array("appn2", "pub1"),
              array("appn3", "pub1" ,"pub2")
            );

The first item in each array is application number and the rest in each array are the publication numbers. I get the first item(application number) and the last item of each array(latest publication number) like this

 $index = count(array_keys($shop));
    for($i=0;$i<$index;$i++){

        $appln_nr = $shop[$i][0];
        echo $appln_nr;

        $publn_nr_index = count(array_keys($shop[$i]))-1;
        $publn_nr = $shop[$i][$publn_nr_index];
        echo $publn_nr;
   }

Now I have application number and publication number for each inner array.

I want to create an associative array from the application numbers and publication numbers.

where the key should be the application number and its value is the publication number.

Thanks

EDIT

What I am getting from $shop array

 Array
 (
  [0] => Array
    (
        [0] => appn1
        [1] => pub1
        [2] => pub2
        [3] => pub3
    )

  [1] => Array
    (
        [0] => appn2
        [1] => pub1
    )

  [2] => Array
    (
        [0] => appn3
        [1] => pub1
        [2] => pub2
    )
)

And this is what I need in my associative array

Array(
    "appn1" => "pub3"
    "appn2" => "pub1"
    "appn3" => "pub2"
)

How can I create the associative array from application and publication numbers? — Wearybands
– Wearybands, Commented Oct 12, 2012 at 16:24
from what u defined, you have more than one pub_number in one app_number. do you want the value of each element to be an array of pub_numbers — Nwafor
– Nwafor, Commented Oct 12, 2012 at 16:31

Anthony Hatzopoulos · Accepted Answer · 2012-10-12 17:24:31Z

4

Finally i understood what you wanted, after your edit XD:

$shop = array(
    array("appn1", "pub1" ,"pub2" , "pub3"),
    array("appn2", "pub1"),
    array("appn3", "pub1" ,"pub2")
);
$shopNew = array();

foreach($shop as $value){
    $shopNew[$value[0]] = end($value);
}

// now if you want you can replace $shop and unset $shopNew
$shop = $shopNew;
unset($shopNew);    

print_r($shop);

the output is this:

Array (
  [appn1] => pub3
  [appn2] => pub1
  [appn3] => pub2
)

edited Oct 12, 2012 at 17:24

Anthony Hatzopoulos

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answered Oct 12, 2012 at 16:30

aleation

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3 Comments

Wearybands Over a year ago

This is already I ma doing i want to change it now to associative array

Anthony Hatzopoulos Over a year ago

@UmairIqbal it is an associative array. That's what's being shown except he's var_dumped the result instead of print_r

aleation Over a year ago

I edited my answer because the question wasn't clear at first, @UmairIqbal 's comment is before the edit :P

Baba · Accepted Answer · 2012-10-12 16:35:02Z

1

You can try

$shop = array(
        array("appn1","pub1","pub2","pub3"),
        array("appn2","pub1"),
        array("appn3","pub1","pub2")
        );

$final = array();
array_map(function ($var) use(&$final) {$final[reset($var)] = end($var);}, $shop);
var_dump($final);

Output

array
  'appn1' => string 'pub3' (length=4)
  'appn2' => string 'pub1' (length=4)
  'appn3' => string 'pub2' (length=4)

answered Oct 12, 2012 at 16:35

Baba

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Comments

hakre · Accepted Answer · 2012-10-12 16:36:05Z

1

You can easily convert your array into a new format by using the first element as key (see reset) and the last element (see end) as value:

foreach($shop as $fl) {
    $v[reset($fl)] = end($fl);
}

Result is in $v then.

If you want to transform the array you need to delete each element as well:

foreach($shop as $v => $fl) {
    $shop[reset($fl)] = end($fl);
    unset($shop[$v]);
}

Result is in $shop then. Unset takes care of removing from the array.

Output in both cases is:

array(3) {
  'appn1' =>
  string(4) "pub3"
  'appn2' =>
  string(4) "pub1"
  'appn3' =>
  string(4) "pub2"
}

edited Oct 12, 2012 at 16:36

answered Oct 12, 2012 at 16:31

hakre

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Comments

Teena Thomas · Accepted Answer · 2012-10-12 16:41:21Z

0

try this:

 foreach($shop as $k => $v) {            
     $new_arr[$v[0]] = end($v);      
 }

It should give you this result,

$new_arr = array(
      "appn1" => "pub3",
      "appn2" => "pub1",
      "appn3" => "pub2"-
);

edited Oct 12, 2012 at 16:41

answered Oct 12, 2012 at 16:31

Teena Thomas

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Comments

Hitesh Tarbundiya · Accepted Answer · 2018-11-28 09:11:29Z

0

You can also create like this,

$arrField = [];
$arrField['id'] = '0001';
$arrField["first_name"] ='Demo Test';
print_r($arrField);

print_r($arrField) display output like this.

Array ( [id] => 0001 [first_name] => Demo Test )

answered Nov 28, 2018 at 9:11

Hitesh Tarbundiya

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