Replace Keys in an Array Based on Another Lookup/Mapping Array

Replace keys in an array based on another lookup/mapping array

$arr[$newkey] = $arr[$oldkey];
unset($arr[$oldkey]);

Search for keys from an array within values of another array and replace

Need $i referenced with & to use this way:

foreach ($info as &$i){
    $i[1] = str_replace(array_keys($map), $map, $i[1]);
}

How to rename sub-array keys in PHP?

You could use array_map() to do it.

$tags = array_map(function($tag) {
    return array(
        'name' => $tag['name'],
        'value' => $tag['url']
    );
}, $tags);

Replace one arrays keys with another arrays values in php

This is made quite nice with a foreach loop

foreach( $data as $origKey => $value ){
  // New key that we will insert into $newArray with
  $newKey = $map[$origKey];
  $newArray[$newKey] = $value;
}

A more condensed approach (eliminating variable used for clarification)

foreach( $data as $origKey => $value ){
  $newArray[$map[$origKey]] = $value;
}

Using PHP, search an array by key and replace value in another array with value from matched key

You can do it as following:

foreach($array_a as $elemKey => $elemValue){
    foreach($elemValue as $itemKey => $itemValue){
         if(isset($array_a[$elemKey][$itemKey]['label'])){
              $array_a[$elemKey][$itemKey]['label'] = $array_b[$array_a[$elemKey][$itemKey]['label']];        
         } 
    }
}

print_r($array_a);

This will return:

Array
(
    [0] => Array
        (
            [0] => Array
                (
                    [name] => name
                    [label] => Name:
                )

            [1] => Array
                (
                    [name] => phone_office
                    [label] => Office phone:
                )

        )

    [1] => Array
        (
            [0] => Array
                (
                    [name] => website
                    [label] => Website:
                )

            [1] => Array
                (
                    [name] => phone_fax
                    [label] => Fax number:
                )

        )

)

Replace array keys (foreach loop) who matches another array

How about:

$replacements = array();
$replacements[2] = 'Car';   // your key should be the key of $array_a here and 
$replacements[1] = 'Boat';  // value should be the key you want to be used
$replacements[5] = 'Bike';
$replacements[3] = 'Photo';


$finalPollArray = array();

foreach($replacements as $key => $value)
{
    $finalPollArray[$value] = $array_a[$key];
}  

$finalPollArray = asort($finalPollArray)

print "<pre>";
print_r($finalPollArray);
print "</pre>";

A very practical example would be:

$poll[5] = 13;
$poll[6] = 12;
$poll[3] = 10;
$poll[12] = 7;
$poll[8] = 6;
$poll[1] = 5;
$poll[7] = 5;
$poll[16] = 5;
$poll[13] = 4;

 // with this code I get the following output
$replacements = array();
$replacements[5] = 'Car';

$finalPollArrayA = array();

 foreach($replacements as $key => $value)
 {
     $finalPollArrayA[$value] = $poll[$key];
 }

 print "<pre>";
 print_r($finalPollArrayA);
 print "</pre>";

and this outputs me:

Array
(
    [Car] => 13
)

is it as expected?

PHP - How to edit a key of an array?

well simple solution is:

$array[$newkey] = $array[$oldkey];
unset($array[$oldkey]);

In your case you would loop through:

$newArray = array();
foreach($array as $key => $value) {
   $newKey = end(explode("\\", $key)); //need latest php for this otherwise split end and explode

   $newArray[$newKey] = $value;
}