Get results from 2d array using other array

Question

I have an array

Array
(
    [0] => 4
    [1] => 5
)

and other one

Array
(
    [0] => Array
        (
            [v1] => aa
            [v2] => ss
        )
.
.
.
.

    [4] => Array
        (
            [v1] => vv
            [v2] => dd
        )

    [5] => Array
        (
            [v1] => gg
            [v2] => rr
        )
)

The question, how can I get results from the second array using values in the first one. The output should be looking like this

[4] => Array
    (
        [v1] => vv
        [v2] => dd
    )

[5] => Array
    (
        [v1] => gg
        [v2] => rr
    )

I'm trying some function like array_intersect and array_values but It didn't work.

Mihai Matei · Accepted Answer · 2016-02-05 12:25:33Z

2

You can use array_intersect_key and array_flip:

$result = array_intersect_key($secondArray, array_flip($firstArray));

answered Feb 5, 2016 at 12:25

Mihai Matei

24.3k5 gold badges34 silver badges50 bronze badges

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

2 Comments

Darragh Enright Over a year ago

Ha. Didn't see your answer before I posted my (identical) answer. Great minds eh? ;)

Mihai Matei Over a year ago

:) no problem.. there are a lot of answers using the foreach loop but we thought it will be nicer to use these built in functions :)

Sougata Bose · Accepted Answer · 2016-02-05 12:29:13Z

1

This would iterate trough the first array and get the values from the second array.

$newarray=array();
foreach ($array1 as $v) {
    $newarray[$v] = $array2[$v];
}

edited Feb 5, 2016 at 12:29

Sougata Bose

31.8k8 gold badges52 silver badges89 bronze badges

answered Feb 5, 2016 at 12:25

Phiter

15k14 gold badges52 silver badges87 bronze badges

1 Comment

Phiter Over a year ago

No problem, don't forget to pick an accepted answer then ;) Also thank you @Sougata for the answer improvement.

David · Accepted Answer · 2016-02-05 12:27:18Z

0

try doing something like this

$array_a;/* 
    Array
    (
        [0] => 4
        [1] => 5
    )*/
    $result = array() ;
    foreach ($array_a as $res){
        if ( array_key_exists($array_b[$res])  ){
            $result[] = $array_b[$res] 
        }
    }

answered Feb 5, 2016 at 12:27

David

1,1434 gold badges18 silver badges30 bronze badges

Comments

Peyman Mohamadpour · Accepted Answer · 2016-02-05 12:34:44Z

0

You may do it like this:

$output = array();

foreach( $first_array as $v ){
    $output[$v] = $second_array[$v];
}

//$output has
//[4] => Array
//(
//    [v1] => vv
//    [v2] => dd
//)

//[5] => Array
//(
//    [v1] => gg
//    [v2] => rr
//)

edited Feb 5, 2016 at 12:34

answered Feb 5, 2016 at 12:25

Peyman Mohamadpour

18k24 gold badges94 silver badges102 bronze badges

1 Comment

Issam Mousleh Over a year ago

Thank you . . I have more than one key, is it work ?

Kalpesh Rajvir · Accepted Answer · 2016-02-05 12:39:20Z

0

This is the executed code.

<?php

 $array1 = array(3,5);

 echo '<pre>';
 print_r($array1);

 $array2 = array();
 $array2[0] = array('v1'=>'aa','v2'=>'ss');
 $array2[3] = array('v1'=>'vv','v2'=>'dd');
 $array2[4] = array('v1'=>'xx','v2'=>'yy');
 $array2[5] = array('v1'=>'gg','v2'=>'rr');
 print_r($array2);

 $array3 = array();
 for($i=0;$i<=count($array1)-1;$i++)
 {
    if (array_key_exists($array1[$i], $array2))
          $array3[$array1[$i]] = $array2[$array1[$i]];
 }  

 print_r($array3);

 ?>

answered Feb 5, 2016 at 12:39

Kalpesh Rajvir

92 bronze badges

3 Comments

Phiter Over a year ago

Well that's one old way of doing it.

Kalpesh Rajvir Over a year ago

may be but it results the same which is requested. :)

Phiter Over a year ago

Yeah, it's a valid solution but it costs more coding than a simple foreach

Collectives™ on Stack Overflow

Get results from 2d array using other array

5 Answers 5

2 Comments

1 Comment

Comments

1 Comment

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

5 Answers 5

2 Comments

1 Comment

Comments

1 Comment

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related