Convert PHP array into Key => Value Array

Question

Total PHP Noob and I couldn't find an answer to this specific problem. Hope someone can help!

$myvar is an array that looks like this:

Array (  
 [aid] => Array (  
  [0] => 2  
  [1] => 1  
 )  
 [oid] => Array(  
  [0] => 2  
  [1] => 1  
 )  
)

And I need to set a new variable (called $attributes) to something that looks like this:

$attributes = array(
 $myvar['aid'][0] => $myvar['oid'][0], 
 $myvar['aid'][1] => $myvar['oid'][1], 
 etc...
);

And, of course, $myvar may contain many more items...

How do I iterate through $myvar and build the $attributes variable?

this question is ambiguous, you should provide a bigger example set... — NDM
– NDM, Commented Mar 4, 2011 at 15:24

Ryan Chouinard · Accepted Answer · 2011-03-04 15:31:39Z

7

use array_combine()

This will give expected result.

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

Usage:

$attributes = array_combine($myArray['aid'], $myArray['oid']);

Will yield the results as requested.

edited Mar 4, 2011 at 15:31

Ryan Chouinard

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answered Mar 4, 2011 at 15:22

Gaurav

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3 Comments

Shakti Singh Over a year ago

how it is useful here can you expalin

harpax Over a year ago

$attributes = array_combine($myvar['aid'], $myvar['oid']);

Feature Over a year ago

This was it! Thanks so much! I still dont totally understand how its working, but I'll dig in deeper to see.

harpax · Accepted Answer · 2011-03-04 15:25:09Z

0

Somthing like this if I understood the question correct

$attributes = array();
foreach ($myvar['aid'] as $k => $v) {
    $attributes[$v] = $myvar['oid'][$k]; 
}

answered Mar 4, 2011 at 15:25

harpax

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1 Comment

Ryan Chouinard Over a year ago

Iteration like this is a waste of cycles and effort, and a bottleneck for very large array sets. The built-in array* functions are much more efficient.

Nasir Iqbal · Accepted Answer · 2011-03-04 18:05:35Z

0

Your requirements are not clear. what you mean by "And, of course, $myvar may contain many more items..." there is two possibilties

1st. more then two array in main array. like 'aid', 'oid' and 'xid', 'yid' 2nd. or two main array with many items in sub arrays like "[0] => 2 [1] => 1 [2] => 3"

I think your are talking about 2nd option if so then use following code

$aAid = $myvar['aid'];
$aOid = $myvar['oid'];

foreach ($aAid as $key => $value) {
  $attributes['aid'][$key] = $value;
  $attributes['oid'][$key] = $myvar['oid'][$key];
}

answered Mar 4, 2011 at 18:05

Nasir Iqbal

8727 silver badges24 bronze badges

Comments

Michael Roosing · Accepted Answer · 2011-03-04 15:32:42Z

-1

You can itterate though an array with foreach and get the key and values you want like so

$attributes = array() 
foreach($myvar as $key => $val) {
   $attributes[$key][0] = $val;
}

edited Mar 4, 2011 at 15:32

answered Mar 4, 2011 at 15:23

Michael Roosing

693 bronze badges

3 Comments

I.devries Over a year ago

this is the same as $attributes = $myvar

Blair McMillan Over a year ago

Should be $attributes[$key] = $val[0]; for what the OP wants.

Michael Roosing Over a year ago

@blair your right i chanched my answer to reflect this change

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