How to get array element by passing another array element ?

Question

I have an array follow

[0] => Array
 (
    [month] => Oct
    [amount] => 1200.00
 )

and how do i get [amount] by passing [month]

You have to either iterate over the array and search for the month value or convert your array to month => amount for direct access. — Felix Kling
– Felix Kling, Commented Oct 19, 2012 at 8:18
Yes, you have to use a loop. The datastructure is unfortunate for that. If you can change it, this would be the best option. — Flo
– Flo, Commented Oct 19, 2012 at 8:19

deceze · Accepted Answer · 2012-10-19 08:18:16Z

6

You don't. Two options:

Loop:

foreach ($array as $i) {
     if ($i['month'] == 'Oct') {
         echo $i['amount'];
     }
}

Index the data by month:

$array = array_combine(array_map(function($i) { return $i['month']; }, $array),
                       $array);
echo $array['Oct']['amount'];

answered Oct 19, 2012 at 8:18

deceze♦

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2 Comments

Felix Kling Over a year ago

The second option would only work if the month for each entry is unique. You could always create a month => [amount, ...] map, but that's a bit more complex. Just pointing it out :), it should be enough to get the OP started.

deceze Over a year ago

Totally correct, obviously I'm working on assumptions here... :)

Alexey Sidorov · Accepted Answer · 2012-10-19 08:19:59Z

1

foreach ($arr as $k => $v) {
    if ($v['month'] == $needleMonth) {
        echo $v['amount'] . ' - that`s it';
        break;
    }
}

answered Oct 19, 2012 at 8:19

Alexey Sidorov

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Comments

Leto · Accepted Answer · 2012-10-19 08:18:07Z

0

You have to loop your array and test each time if your wanted month == $arrayElement[$i]['month']

answered Oct 19, 2012 at 8:18

Leto

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Comments

Tim · Accepted Answer · 2012-10-19 08:18:30Z

0

foreach ($arr as $k=>$v) {
    if ($v['month']=='Oct') {
        echo $v['amount'];
    }
}

answered Oct 19, 2012 at 8:18

Tim

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Comments

Baronth · Accepted Answer · 2012-10-19 08:20:03Z

0

$selectedMonth = 'Oct';

foreach($yourArray as $child){

    if($child['month'] == $selectedMonth){
        echo $child['amount'];
    }

}

answered Oct 19, 2012 at 8:20

Baronth

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