Php two different array with same keys

Question

I am new to php and still learning the language,

let say I have two array

For Example

Array
(
    [house_id] => 6
    [name] => Lake Villa
    [floor] => 5
    [unit] => 25
)

Array
(
    [house_id] => 6
    [name] => Lake Villa
    [floor] => 5
    [unit] => 25
    [parking_id] => 9
    [resident_count] => 4
)

How do i get the keys of 1st array onto second, what i am saying is, i just need house_id, name, floor, unit from second array and discard rest of the information.

However, they key is not same and dynamic, which means the first array key whatever returned is also present on second but with additional information. The information above is just an example and the keys might varies but whatever key on first array contains on second array too.

I tried this, but isn't working:

foreach($arr1 as $k=>$v) {
    foreach($arr2 as $j=>$w) {
        if(isset($arr2[$k]))
            $arr[$k] = $w;
    }
}

what is the expected output? I simply don't understand .. sorry — Mihai Iorga
– Mihai Iorga, Commented Oct 3, 2012 at 7:36
Have you experimented with array_merge? php.net/manual/en/function.array-merge.php — Mere Development
– Mere Development, Commented Oct 3, 2012 at 7:39
-1 This question should be improved by giving expected output. — Ja͢ck
– Ja͢ck, Commented Oct 3, 2012 at 7:51
@jack How do i get the keys of 1st array onto second, what i am saying is, i just need house_id, name, floor, unit from second array and discard rest of the information. — joh
– joh, Commented Oct 3, 2012 at 8:12

lix · Accepted Answer · 2012-10-03 07:36:30Z

2

You could use array_intersect_key, to merge the arrays.

$newArray = array_intersect_key($array2, $array1);

answered Oct 3, 2012 at 7:36

lix

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Comments

Community · Accepted Answer · 2020-06-20 09:12:55Z

2

Use array_intersect_key().

array_intersect_key() returns an array containing all the entries of array1 which have keys that are present in all the arguments.

Code

var_dump(array_intersect_key($array1, $array2));

edited Jun 20, 2020 at 9:12

CommunityBot

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answered Oct 3, 2012 at 7:38

Glavić

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Comments

loler · Accepted Answer · 2012-10-03 07:45:15Z

1

foreach($arr2 as $key=>$val){
   if(!array_key_exists($key,$arr1))        
   unset($arr2[$key]);
}

edited Oct 3, 2012 at 7:45

answered Oct 3, 2012 at 7:36

loler

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2 Comments

joh Over a year ago

would appericiate if you can be done within two array. thanks

loler Over a year ago

I dont think its better then array_intersect_key, but it's alternative.

Yogesh Suthar · Accepted Answer · 2012-10-03 07:38:32Z

0

change condition from

if(isset($arr2[$k]))

to

if($arr1[$k] == $arr2[$j])   // it will work.

and isset is used for checking the variable is set or not.

answered Oct 3, 2012 at 7:38

Yogesh Suthar

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Comments

Annemarie · Accepted Answer · 2012-10-03 07:38:45Z

0

Try this:

foreach($arr2 as $k=>$v) {
    //Check if key is in first array
    if(!isset($arr1[$k])) {
        //Key not in first array, remove from second array. 
        unset($arr2[$k]); 
    }
}

answered Oct 3, 2012 at 7:38

Annemarie

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Comments

webCoder · Accepted Answer · 2012-10-03 07:39:01Z

0

try this

$result_array = array_intersect_key($arr2, $arr1);

answered Oct 3, 2012 at 7:39

webCoder

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