php实现多维数组中每个单元值(数字)翻倍的方法_PHP教程

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$arr = array(1,3,'a'=>20,'b'=>array(2,4,6,'c'=>7));

function arr2($arr){

foreach($arr as $key=>$v){

if(!is_array($v)){

$arr[$key] *= 2;

}else{

$arr[$key] = arr2($arr[$key]);

}

}

return $arr;

}

echo "

";

            
print_r(arr2($arr));
            
?>
            

            

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$arr = array(1,3,'a'=>20,'b'=>array(2,4,6,'c'=>7));

function t(&$arr){

$arr *= 2;

}

echo "

";

            
array_walk_recursive($arr,'t');
            
print_r($arr);
            
?>