PHP数组案例声明检查

Question

I have a variable that may either be a string of the group id or an array of many group id's. Is there wa way to shorten a check to see if they belong to a group.

if(is_array($groups)){
    /* Check for multiple groups */
    $total = count($groups);
    $hasperm = false;
    while($total > 0){
        /* If account has a bad status dont login */
        switch($group[$total]){
            case 4:
                $errmsg_arr[] = array('type'=>'crucial','alert'=>'Alert!','msg'=>'Your account is not active, contact admin');
                failedAttempt($errmsg_arr);
                break;
            case 6:
                $errmsg_arr[] = array('type'=>'crucial','alert'=>'Alert!','msg'=>'Your account is banned, contact admin');
                failedAttempt($errmsg_arr);
                break;
            case 5:
                $errmsg_arr[] = array('type'=>'crucial','alert'=>'Alert!','msg'=>'Your account is scheduled for deletion, if you are reading this you may still have time to recover your account, Call 716-698-9236. $50 Reactivation fee required.');
                failedAttempt($errmsg_arr);
                break;
        }
        $total--;
    }
}else{
    /* If account has a bad status dont login */
    switch($groups){
        case 4:
            $errmsg_arr[] = array('type'=>'crucial','alert'=>'Alert!','msg'=>'Your account is not active, contact admin');
            failedAttempt($errmsg_arr);
            break;
        case 6:
            $errmsg_arr[] = array('type'=>'crucial','alert'=>'Alert!','msg'=>'Your account is banned, contact admin');
            failedAttempt($errmsg_arr);
            break;
        case 5:
            $errmsg_arr[] = array('type'=>'crucial','alert'=>'Alert!','msg'=>'Your account is scheduled for deletion, if you are reading this you may still have time to recover your account, Call 716-698-9236. $50 Reactivation fee required.');
            failedAttempt($errmsg_arr);
            break;
    }
}

Answer 1

If it's not an array, create a one-element array containing the value. Then use the code you've already written for arrays.

if (!is_array($groups)) {
    $groups = array($groups);
}
// Now use the array code