php array_search() does not return key

Question

I have the following array ($arrayres) (example data)

Array
(
[0] => Array
        (
            [description] => somedata
            [amount] => 52,6
            [b_id] => Array
                (
                    [0] => 138950106
                    [1] => 138950106
                )

        )

    [1] => Array
        (
            [description] => somedata 
            [amount] => 4,9
            [b_id] => Array
                (
                    [0] => 138911857
                    [1] => 138911857
                )

        )
)

Then I have a query that returns the b_id in its results as well. I need to find which of the b_id's are included in the array and their respective position in the array. So I perform an array_rearch

while ($dbres = $res->fetchRow(MDB2_FETCHMODE_ASSOC))
{

    $key = array_search($dbres['b_id'], $arrayres);
    if ($key)
    {
        $keys[] = $key;
    }

}

But there seems to be no match. print_r($keys) is always empty, although there are results that contain the b_id's in question.

What am I doing wrong?

Ok Thanks guys I got it. I thought (hoped) it would give me an array with the keys. In order to make the procedure simpler, I created another array $bid[] that holds only the b_id and (using the same keys), and made an array_search on that. — mspir
– mspir, Commented May 15, 2012 at 12:48

DonCallisto · Accepted Answer · 2012-05-15 12:40:17Z

2

When you do array_search($dbres['b_id'], $arrayres); you're searching for keys onto "the first layer" of that nested array and, of course, theare are only 0 or 1 as keys

You could do something like that

for($i=0;$i<count($arrayres);$i++) {
    array_search($dbres['b_id'], $arrayres[$i]['b_id']);
    if ($key)
    {
     $keys[] = $key; /* just follow your logic */
    }
}

and that has to be inserted into the while loop

edited May 15, 2012 at 12:40

answered May 15, 2012 at 12:24

DonCallisto

30k9 gold badges74 silver badges104 bronze badges

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

Comments

jadkik94 · Accepted Answer · 2012-05-15 12:44:33Z

The array you are searching does not contain the b_id you are searching for. It contains an array that contains that bid.

So you need to loop yourself through the array of data you have, or supply array_search the whole array, if you can. One way would be this:

function has_bid($arrayres, $bid) {
    foreach ($arrayres as $k => $v) {
            // This is assuming $bid is an array with 2 integers.
            if ($v['bid'] == $bid) {
                return $k;
            }
            // And this is assuming $bid is one of the integers.
            /*
               Here, array_search will search for the integer in an array that contains
               the values you are searching for in the first level,
               not inside an array that is inside another one.
               You can think of it as array_search searching the first level of it.
            */
            if (array_search($bid, $v) !== false) {
                return $k;
            }
    }
    return false;
}

And you would use this function like so:

$key = has_bid($arrayres, $dbres['bid']);
if ($key !== false) {
     // do something...
}

Rukmi Patel · Accepted Answer · 2012-05-15 12:24:35Z

-1

try this...

if($key !== false){
     $keys[] = $key;
}

answered May 15, 2012 at 12:24

Rukmi Patel

2,5619 gold badges29 silver badges42 bronze badges

3 Comments

Rukmi Patel Over a year ago

some times when key =0 and if we check ($key != false) then it will not conside value on 0th index.

DonCallisto Over a year ago

But this isn't the answer to his question

Rukmi Patel Over a year ago

he has already done coding .. while loop. I am asking him to remove if condition in while loop and put my condition..

Collectives™ on Stack Overflow

php array_search() does not return key

3 Answers 3

Comments

Comments

3 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

3 Comments

Your Answer

Sign up or log in

Post as a guest

Related