How can I get in_array() to work with multidimensional arrays?

Question

What am I doing wrong in the code below?

print_r(array_values($haystack));

returns the following:

Array ( [0] => Array ( [name] => album2 ) [1] => Array ( [name] => album3 ) [2] => Array ( [name] => Album 1 ) [3] => Array ( [name] => jopie99 ) [4] => Array ( [name] => kopie3 ) [5] => Array ( [name] => test56 ) [6] => Array ( [name] => rob7 ) ) testArray ( [0] => Array ( [name] => album2 ) [1] => Array ( [name] => album3 ) [2] => Array ( [name] => Album 1 ) [3] => Array ( [name] => jopie99 ) [4] => Array ( [name] => kopie3 ) [5] => Array ( [name] => test56 ) [6] => Array ( [name] => rob7 ) )

Now I have the following code:

$needle = 'album3';

if (in_array($needle, $haystack)) {   
    //do something 
}

At least the needle can be found somewhere in the haystack, but apparently not with the if statement given. Can someone help me out?

RTM php.net/manual/en/function.in-array.php

Funk Forty Niner
– Funk Forty Niner

2015-08-07 14:15:11 +00:00
Commented Aug 7, 2015 at 14:15 — Funk Forty Niner
– Funk Forty Niner, Commented Aug 7, 2015 at 14:15

RNK · Accepted Answer · 2015-08-07 14:17:37Z

1

As you are using multidimentional array. you can use below method.

$needle = 'album3';
foreach($haystack as $h){
  if ( $h['name'] == $needle ){
     // do something...
  }
}

answered Aug 7, 2015 at 14:17

RNK

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Comments

Narendrasingh Sisodia · Accepted Answer · 2015-08-07 14:32:37Z

1

Try using array_column along with in_array as

Note : PHP>=5.5

if(in_array($needle,array_column($arr,'name'))){
   //your code
}

or you can alternatively use as

if(in_array(['name' => $needle],$arr)){
    //your code
}

edited Aug 7, 2015 at 14:32

answered Aug 7, 2015 at 14:19

Narendrasingh Sisodia

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Comments

Rizier123 · Accepted Answer · 2015-08-07 14:21:07Z

0

This should work for you:

Just go through each array value with array_walk_recursive() and check if the needle is equals the value. If yes simply set the result to true.

<?php

    $needle = 'album3';
    $arr = [["album1"],["album2"],["album4"],["album3"]];
    $result = FALSE;

    array_walk_recursive($arr, function($v, $k)use($needle, &$result){
        if($v == $needle)
            $result = TRUE;
    });

    var_dump($result);

?>

This works with every array no matter how many dimensions it has.

answered Aug 7, 2015 at 14:21

Rizier123

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Comments

CpCd0y · Accepted Answer · 2015-08-07 14:22:59Z

0

Try doing this using strict checking:

if (in_array($needle, $haystack, true))

Read the documentation for more info.

answered Aug 7, 2015 at 14:22

CpCd0y

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