PHP用正确的密钥填充关联数组

Question

 $niz = array(
        'fruit1' => 'apple',
        'fruit2' => 'orange',
        'fruit3' => 'grape',
        'fruit4' => 'watermelon',
        'fruit5' => 'grapefruit'
        );

    $max = 'yellow';
    $niz2 = array();
    $niz3 = array();

    foreach($niz as $k => $v){

        if (strlen($v) <= strlen($max)) {
            array_push($niz2, $v);  
                } 
        else { 
        $niz3[$niz[$k]]=$v;
            }   
    }   
    print_r($niz3);

How can I get the appropriate key from the $niz array in my $niz3          associative array in the else statement? 

I.e. Array( [fruit4] => watermelon [fruit5] => grapefruit )

I get: Array ( [watermelon] => watermelon [grapefruit] => grapefruit )

Answer 1

You need to change $niz3[$niz[$k]]=$v; to $niz3[$k]=$v;,

$k is the "key", by passiing it into $niz you are accessing the value, which you have already defined as $v.