Changing key's name in a array

Question

So, having an array like the following:

$input = [
    'first_name'   => 'Alex',
    'last_name'    => 'UFO',
    'email'        => '[email protected]',
    'phone_number' => '124124',
    // .....
    'referral_first_name'   => 'Jason',
    'referral_last_name'    => 'McNugget',
    'referral_email'        => '[email protected]',
    'referral_phone_number' => '1212415',
];

After processing the first part, until referral..., do you think of any better way to replace referral_first_name with first_name and so on, then the following? Maybe a more dynamic and automatic way.

$input['first_name'] = $input['referral_first_name'];
unset($input['referral_first_name']);

$input['last_name'] = $input['referral_last_name'];
unset($input['referral_last_name']);

$input['email'] = $input['referral_email'];
unset($input['referral_email']);

$input['phone_number'] = $input['referral_phone_number'];
unset($input['referral_phone_number']);

Guys, I forgot to mention, but I have already done it with foreach, but the problem will be when the array gets pretty large (and usually does, and not by one person using that function, but by many), and that would mean extra unnecessary processing time, since it has to iterate through the whole array, before reaching the referral_.. part.

There is no other way, except for doing so when you create the array. — dkasipovic
– dkasipovic, Commented Apr 9, 2014 at 7:51
After remove referral_ your keys duplicated and overwitten. Be careful on that. And you can see my answer and working demo — Hüseyin BABAL
– Hüseyin BABAL, Commented Apr 9, 2014 at 8:04

ponciste · Accepted Answer · 2014-04-09 08:00:48Z

2

you must create another array, this code should do it dynamically:

$newInput = array();
foreach($input as $key => $element){
    $newKey = explode("_", $key, 2);
    $newInput[$newKey[1]] = $element;
}

OUTPUT

enter image description here

hope this helps :-)

answered Apr 9, 2014 at 8:00

ponciste

2,22916 silver badges16 bronze badges

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

Comments

Shankar Narayana Damodaran · Accepted Answer · 2014-04-09 08:29:51Z

1

Recreating the array is the only way..

Grab all the keys from the original array and put it in a temp array
Use array_walk to modify that temp array to add the referral word to it
Now use array_combine using the above keys and values from the old array.

The code..

<?php
$input = [
    'first_name'   => 'Alex',
    'last_name'    => 'UFO',
    'email'        => '[email protected]',
    'phone_number' => '124124'];

$ak = array_keys($input);
array_walk($ak,function (&$v){ $v = 'referral_'.$v;});
$input=array_combine($ak,array_values($input));
print_r($input);

OUTPUT:

Array
(
    [referral_first_name] => Alex
    [referral_last_name] => UFO
    [referral_email] => [email protected]
    [referral_phone_number] => 124124
)

Since you are looking for performance , Use a typical `foreach`

$newarr = array();
foreach($input as $k=>$v ) {
$newarr["referral_".$k]=$v;
}

edited Apr 9, 2014 at 8:29

answered Apr 9, 2014 at 7:55

Shankar Narayana Damodaran

68.6k43 gold badges102 silver badges129 bronze badges

7 Comments

Alex Over a year ago

This looks really nice. I had a solution that involved using foreach, but don't really want to use it, since the array might get pretty large. So yea, great!

Amal Over a year ago

@w0rldart: If the array is pretty large, then you might want to stick to using foreach instead. array_walk is slower when done over large arrays. Also, unlike foreach, you can't limit the actions inside the function(&$v) { ... } block, as it would get executed every time.

Alex Over a year ago

@ShankarDamodaran then I might not use any of these solutions at all, since they all involve some increase in the processing time, and rather use the unset version. Hadn't thought that array_walk could be slower. Thanks for the info

Shankar Narayana Damodaran Over a year ago

@w0rldart, From your question's edit , the array_walk still uses internal looping structures.

Alex Over a year ago

@ShankarDamodaran Yea, so it seems. Well I'll stick to unset for now, but thanks for your solution!

|

Wietse · Accepted Answer · 2014-04-09 07:55:27Z

0

How about something like this:

$replace = array('first_name', 'last_name', 'email');
foreach($replace AS $key) {
    $input[$key] = $input['referral_' . $key];
    unset($input[$input['referral_' .$key]]);
}

answered Apr 9, 2014 at 7:55

Wietse

3707 silver badges19 bronze badges

Comments

solvease · Accepted Answer · 2014-04-09 07:57:57Z

0

try the below one...

$input = [
   //'first_name'   => 'Alex',
   // 'last_name'    => 'UFO',
   // 'email'        => '[email protected]',
    //'phone_number' => '124124',
    // .....
    'referral_first_name'   => 'Jason',
    'referral_last_name'    => 'McNugget',
    'referral_email'        => '[email protected]',
    'referral_phone_number' => '1212415',
];

foreach ($input as $key=>$value){
    $refereal_pos = strpos($key, 'referral_');
    if($refereal_pos !== FALSE && $refereal_pos == 0){
        $input[str_replace('referral_', '', $key)] = $value;
        unset($input[$key]);
    }
}

print_r($input);

answered Apr 9, 2014 at 7:57

solvease

5392 silver badges11 bronze badges

Comments

Hüseyin BABAL · Accepted Answer · 2014-04-09 08:03:20Z

0

You can use following;

function changeKeys($input) {
    $keys = array_keys($input);
    foreach($keys as $key) {
        if (strpos($key, "referral_") !== false) {
            $tempKey = explode("referral_", $key);
            $input[$tempKey[1]] = $input[$key];
                unset($input[$key]);
        }
    }   
    return $input;
}

changeKeys($input);

Here is a working demo: codepad

Note: Be sure that, your keys overwrited due to duplicate keys after "referral_" removal

answered Apr 9, 2014 at 8:03

Hüseyin BABAL

15.6k5 gold badges53 silver badges74 bronze badges

Collectives™ on Stack Overflow

Changing key's name in a array

5 Answers 5

Comments

Recreating the array is the only way..

The code..

Since you are looking for performance , Use a typical `foreach`

7 Comments

Comments

Comments

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

Comments

Recreating the array is the only way..

The code..

Since you are looking for performance , Use a typical foreach

7 Comments

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Related

Since you are looking for performance , Use a typical `foreach`