Changing key's name in a array - php

Question

So, having an array like the following:
$input = [
'first_name' => 'Alex',
'last_name' => 'UFO',
'email' => 'test#test.com',
'phone_number' => '124124',
// .....
'referral_first_name' => 'Jason',
'referral_last_name' => 'McNugget',
'referral_email' => 'jingleball#nuggets.com',
'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.

Answer 1

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
hope this helps :-)

Answer 2

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' => 'test#test.com',
'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] => test#test.com
[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;
}

Answer 3

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]]);
}

Answer 4

try the below one...
$input = [
//'first_name' => 'Alex',
// 'last_name' => 'UFO',
// 'email' => 'test#test.com',
//'phone_number' => '124124',
// .....
'referral_first_name' => 'Jason',
'referral_last_name' => 'McNugget',
'referral_email' => 'jingleball#nuggets.com',
'referral_phone_number' => '1212415',
];
foreach ($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);

Answer 5

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