问将 Array数组的 key 加上前缀 ？

$array = [

    "version"    => "1.1",

    "connection" => "close",

];

$array = [

    "http_version"    => "1.1",

    "http_connection" => "close",

];

$arrayPrefix = [];

foreach ($array as $key $value) {

    $arrayPrefix['prefix_' . $key] = $value;

}

$array = $arrayPrefix;