Compare two arrays, use key from array two to find value from array one

Question

I have two arrays,

Array one:

$amount = array(0 => 11, 1 => 22, 2 => 33);

Array two:

$id = array(1 => 1);

I would like to get a result like this, by comparing:

result = array(1 => 22);

I've been trying to do this with several PHP functions, but my brain has now melted.

Hope there is some help out there.

Rikesh · Accepted Answer · 2014-07-01 10:24:34Z

2

Though your question is bit vague I guess what you need is array_intersect_key,

$common = array_intersect_key($amount,$id);

DEMO.

answered Jul 1, 2014 at 10:24

Rikesh

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1 Comment

user3104565 Over a year ago

Thank you. Id been using array_intersect() before, but thanks :-)

chwcz7F · Accepted Answer · 2014-07-01 10:23:06Z

0

If I understand you correctly, you want to loop through the keys in $id and get the corresponding $amount into an array?

$result = array();
foreach($id as $key => $value) {
    if(isset($amount[$key])) {
        $result[$key] = $amount[$key];
    }
    else {
        // handle situation where
        // $amount doesn't have that key
    }
}

answered Jul 1, 2014 at 10:23

chwcz7F

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Comments

Kylie · Accepted Answer · 2014-07-01 10:26:39Z

0

$array=array();
 foreach($id as $key=>$val){
 if(array_key_exists($key,$amount)){
   $array[$key] = $amount[$key];
 };
}

print_r($array);

DEMO

answered Jul 1, 2014 at 10:26

Kylie

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