PHP 함수가 외부 배열에 액세스하고 수정하도록 하려면 어떻게 해야 합니까?

function someFunction(){
    global $myArr;
    $myVal = //some processing here to determine value of $myVal
    $myArr[] = $myVal;
}

function someFunction(){
    $myArr = array();       // At first, you have an empty array
    $myVal = //some processing here to determine value of $myVal
    $myArr[] = $myVal;      // Put that $myVal into the array
    return $myArr;
}

$result = someFunction();

function someFunction(array & $myArr){
    $myVal = //some processing here to determine value of $myVal
    $myArr[] = $myVal;      // Put that $myVal into the array
}

$myArr = array( ... );
someFunction($myArr);  // The function will receive $myArr, and modify it