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如果用户名已经存在，我正在尝试弄清楚如何在用户名末尾添加 1 ,2 或 3 等。这是我到目前为止所拥有的，但我不能完全让它添加一个数字。它只是一遍又一遍地输入用户名。

require_once 'connect_to_mysql.php';

$username = substr($payer_email, 0, strpos($payer_email, '@'));
$sql = mysql_query("SELECT username FROM transactions WHERE username='$username'");
$numRows = mysql_num_rows($sql);
if ($numRows > 0) {
   $i = 0;

   while ($name_arr = mysqli_fetch_assoc($user_query)) {

      $name = $name_arr['username'];       

      $after = substr($name, strlen($username));

      if (ctype_digit($after)) {

         if (($after = (int) $after) > $i) {

            $i = $after;

         }

      }

   }

   if ($i > 0) {
      $username .= $i;
   }

}

编辑：

我仍然无法确定一种将数字添加到末尾的方法。在我的逻辑中，我能想到的只是使用行数，如果存在重复项，则使用该数字附加到用户名。这就是我到目前为止所拥有的。任何帮助深表感谢。我已经坚持了两天了，在stackoverflow上的搜索中找不到任何东西。

require_once 'connect_to_mysql.php';

$username = substr($payer_email, 0, strpos($payer_email, '@'));
$sql = mysql_query("SELECT username FROM transactions WHERE username='$username'");
$numRows = mysql_num_rows($sql);
if ($numRows > 0) {
   $i = 0;

   while ($row = mysqli_fetch_assoc($sql)) {

      $username = "$username";       

        if($counter > 0){
        $username = $usernamename[$count];
        $counter++;
        }
        else {
        $username == "$username";
        }


}
}

再编辑一个：

我想我可能忽略了一个可能的解决方案。将 id 添加到用户名是一个值得考虑的解决方案吗？那里不能有重复，这是有道理的，对吧？

require_once 'connect_to_mysql.php';

$username = substr($payer_email, 0, strpos($payer_email, '@'));
$sql = mysql_query("SELECT username FROM transactions WHERE username='$username'");
$numRows = mysql_num_rows($sql);
if ($numRows > 0) {
   $i = 0;

   while ($row = mysqli_fetch_assoc($sql)) {

      $id = $row["id"];
      $username = $row['username'];       

        if($counter > 0){
        $username = '.$username.''.$id.';

        }
        else 
        $username == "$username";



}
}

下一个更新：

<?php

// Check to see there are posted variables coming into the script
if ($_SERVER['REQUEST_METHOD'] != "POST") die ("No Post Variables");
// Initialize the $req variable and add CMD key value pair
$req = 'cmd=_notify-validate';
// Read the post from PayPal
foreach ($_POST as $key => $value) {
    $value = urlencode(stripslashes($value));
    $req .= "&$key=$value";
}
// Now Post all of that back to PayPal's server using curl, and validate everything with PayPal
// We will use CURL instead of PHP for this for a more universally operable script (fsockopen has issues on some environments)
//$url = "https://www.sandbox.paypal.com/cgi-bin/webscr";
$url = "https://www.paypal.com/cgi-bin/webscr";
$curl_result=$curl_err='';
$ch = curl_init();
curl_setopt($ch, CURLOPT_URL,$url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER,1);
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_POSTFIELDS, $req);
curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/x-www-form-urlencoded", "Content-Length: " . strlen($req)));
curl_setopt($ch, CURLOPT_HEADER , 0);   
curl_setopt($ch, CURLOPT_VERBOSE, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
curl_setopt($ch, CURLOPT_TIMEOUT, 30);
$curl_result = @curl_exec($ch);
$curl_err = curl_error($ch);
curl_close($ch);

$req = str_replace("&", "\n", $req);  // Make it a nice list in case we want to email it to ourselves for reporting

// Check that the result verifies
if (strpos($curl_result, "VERIFIED") !== false) {
    $req .= "\n\nPaypal Verified OK";
} else {
    $req .= "\n\nData NOT verified from Paypal!";
    mail("chris@.com", "IPN interaction not verified", "$req", "From: chris@.com" );
    exit();
}

/* CHECK THESE 4 THINGS BEFORE PROCESSING THE TRANSACTION, HANDLE THEM AS YOU WISH
1. Make sure that business email returned is your business email
2. Make sure that the transaction’s payment status is “completed”
3. Make sure there are no duplicate txn_id
4. Make sure the payment amount matches what you charge for items. (Defeat Price-Jacking) */

// Check Number 1 ------------------------------------------------------------------------------------------------------------
$receiver_email = $_POST['receiver_email'];
if ($receiver_email != "chris@.com") {
    $message = "Investigate why and how receiver email is wrong. Email = " . $_POST['receiver_email'] . "\n\n\n$req";
    mail("chris@.com", "Receiver Email is incorrect", $message, "From: chris@.com" );
    exit(); // exit script
}
// Check number 2 ------------------------------------------------------------------------------------------------------------
if ($_POST['payment_status'] != "Completed") {
    // Handle how you think you should if a payment is not complete yet, a few scenarios can cause a transaction to be incomplete
}
// Connect to database ------------------------------------------------------------------------------------------------------
require_once 'connect_to_mysql.php';
// Check number 3 ------------------------------------------------------------------------------------------------------------
$this_txn = $_POST['txn_id'];
$sql = mysql_query("SELECT id FROM transactions WHERE txn_id='$this_txn' LIMIT 1");
$numRows = mysql_num_rows($sql);
if ($numRows > 0) {
    $message = "Duplicate transaction ID occured so we killed the IPN script. \n\n\n$req";
    mail("chris@.com", "Duplicate txn_id in the IPN system", $message, "From: chris@.com" );
    exit(); // exit script
} 
// Check number 4 ------------------------------------------------------------------------------------------------------------
$product_id_string = $_POST['custom'];
$product_id_string = rtrim($product_id_string, ","); // remove last comma
// Explode the string, make it an array, then query all the prices out, add them up, and make sure they match the payment_gross amount
$id_str_array = explode(",", $product_id_string); // Uses Comma(,) as delimiter(break point)
$fullAmount = 0;
foreach ($id_str_array as $key => $value) {

    $id_quantity_pair = explode("-", $value); // Uses Hyphen(-) as delimiter to separate product ID from its quantity
    $product_id = $id_quantity_pair[0]; // Get the product ID
    $product_quantity = $id_quantity_pair[1]; // Get the quantity
    $sql = mysql_query("SELECT price FROM products WHERE id='$product_id' LIMIT 1");
    while($row = mysql_fetch_array($sql)){
        $product_price = $row["price"];
    }
    $product_price = $product_price * $product_quantity;
    $fullAmount = $fullAmount + $product_price;
}
$fullAmount = number_format($fullAmount, 2);
$grossAmount = $_POST['mc_gross']; 
if ($fullAmount != $grossAmount) {
        $message = "Possible Price Jack: " . $_POST['payment_gross'] . " != $fullAmount \n\n\n$req";
        mail("chris@.com", "Price Jack or Bad Programming", $message, "From: chris@.com" );
        exit(); // exit script
} 

//
//
require_once 'connect_to_mysql.php';

//now to always get unique username
$username = substr($payer_email, 0, strpos($payer_email, '@'));
if ( ! uniqueName($username))
{
    $username = makeUniqueName($username);
}


//function to check if is the existing username
function uniqueName($username)
{
    $sql = mysql_query("SELECT username FROM transactions WHERE username='$username'");
    $numRows = mysql_num_rows($sql);
    if ($numRows > 0)
    {
        return false;
    }

    return true;
}


//function to generate new unique username
function makeUniqueName($username)
{
    //serch username string for number at the end
    //regexp makes sure all preceeding zeroes go to first match group
    if (preg_match('/^(\S*?0*)?(\d+?)$/', $username, $match))
    {
        //we got digit from the end of string, just add 1 to the digit
        $username = $match[1] . ($match[2] + 1);
    }
    else
    {
        //no digit at the end of string, just add digit 1 at the end
        $username = $username . 1;
    }

if (uniqueName($username))
{
    return $username;
}

    return makeUniqueName($username);
}

// END ALL SECURITY CHECKS NOW IN THE DATABASE IT GOES ------------------------------------
////////////////////////////////////////////////////
// Homework - Examples of assigning local variables from the POST variables
$txn_id = $_POST['txn_id'];
$payer_email = $_POST['payer_email'];
$custom = $_POST['custom'];
$first_name = $_POST['first_name'];
$last_name = $_POST['last_name'];
$payment_date = $_POST['payment_date'];
$mc_gross = $_POST['mc_gross'];
$payment_currency = $_POST['payment_currency'];
$txn_id = $_POST['txn_id'];
$receiver_email = $_POST['receiver_email'];
$payment_type = $_POST['payment_type'];
$payment_status = $_POST['payment_status'];
$txn_type = $_POST['txn_type'];
$payer_status = $_POST['payer_status'];
$address_street = $_POST['address_street'];
$address_city = $_POST['address_city'];
$address_state = $_POST['address_state'];
$address_zip = $_POST['address_zip'];
$address_country = $_POST['address_country'];
$address_status = $_POST['address_status'];
$notify_version = $_POST['notify_version'];
$verify_sign = $_POST['verify_sign'];
$payer_id = $_POST['payer_id'];
$mc_currency = $_POST['mc_currency'];
$mc_fee = $_POST['mc_fee'];
$password = mt_rand(1000, 9999); 
$p_hash = md5($password);
$username = $_POST['makeUniqueName'];
 //

// Place the transaction into the database
$sql = mysql_query("INSERT INTO transactions (product_id_array, payer_email, first_name, last_name, payment_date, mc_gross, payment_currency, txn_id, receiver_email, payment_type, payment_status, txn_type, payer_status, address_street, address_city, address_state, address_zip, address_country, address_status, notify_version, verify_sign, payer_id, mc_currency, mc_fee, password, ip, username) 
   VALUES('$custom','$payer_email','$first_name','$last_name','$payment_date','$mc_gross','$payment_currency','$txn_id','$receiver_email','$payment_type','$payment_status','$txn_type','$payer_status','$address_street','$address_city','$address_state','$address_zip','$address_country','$address_status','$notify_version','$verify_sign','$payer_id','$mc_currency','$mc_fee','$p_hash','$ip','$username')") or die ("unable to execute the query");
$to      = $payer_email;  
$subject = ' | Login Credentials';  
$message = ' 

Your officially all ready to go. To login use the information below.

Your account login information 
------------------------- 
Email: '.$payer_email.' 
Password: '.$password.' 
------------------------- 

You can now login at https://www..com/signin.php';  
$headers = 'From:noreply@.com' . "\r\n";  

mail($to, $subject, $message, $headers);  
mysql_close();
// Mail yourself the details
mail("chris@.com", "NORMAL IPN RESULT YAY MONEY!", $req, "From: chris@.com");

?>
4

3 回答 3

1

如果我理解正确，您可以使用这样的查询在 MySql 端一次性完成

SELECT COALESCE(CONCAT('$username', SUBSTRING(MAX(username), CHAR_LENGTH('$username') + 1) * 1 + 1), '$username') username
  FROM transactions
 WHERE username REGEXP '$username([0-9]+)?$'

这是SQLFiddle演示

附带说明：在您的代码中，您正在混合mysql_*和mysqli_*扩展调用。首先你mysql_query()打电话然后你做mysqli_fetch_assoc()。坚持一个。最好mysqli_*因为mysql_*已弃用。

于 2013-07-30T03:32:14.017 回答
0

未选中的伪 PHP：

// insert code before determining if the desired $userName $isTaken
$newName = "";
if ($isTaken) {
    $i = 1;
    do {
        $newName = $userName . $i;
        $query = "SELECT username FROM transactions WHERE username='$newName'";
        $result = mysql_query($query);
        $numRows = mysql_num_rows($result);
        if ($numRows == 0) $i = 0;
    } while ($i != 0)
}

如果您想避免多次查询，请搜索每个 LIKE 用户名并自行排序，但根据规模，它可能不会那么昂贵。

于 2013-07-29T19:11:58.503 回答
0

始终获得唯一用户名的解决方案。如果字符串末尾有数字使其唯一，它将添加+1，并重新检查是否唯一，如果没有，它将一次又一次地做，直到找到唯一的名称。如果末尾没有数字，它将在末尾添加 1 并像以前一样重新检查，直到找到唯一的不存在的名称。

$dbConn = new mysqli($host, $dbUser, $dbPass, $dbName);

//now to always get unique username
$username = substr($payer_email, 0, strpos($payer_email, '@'));
if ( ! isUniqueName($username))
{
    $username = makeUniqueName($username);
}


//function to check if is the existing username
function isUniqueName($username)
{
    global $dbConn;

    $sql = mysqli_query($dbConn, "SELECT username FROM transactions WHERE username='$username'");
    $numRows = mysqli_num_rows($sql);
    if ($numRows > 0)
    {
        return false;
    }

    return true;
}


//function to generate new unique username
function makeUniqueName($username)
{
    //serch username string for number at the end
    //regexp makes sure all preceeding zeroes go to first match group
    if (preg_match('/^(\S*?0*)?(\d+?)$/', $username, $match))
    {
        //we got digit from the end of string, just add 1 to the digit
        $username = $match[1] . ($match[2] + 1);
    }
    else
    {
        //no digit at the end of string, just add digit 1 at the end
        $username = $username . 1;
    }

    if (isUniqueName($username))
    {
        return $username;
    }

    return makeUniqueName($username);
}
于 2013-07-29T20:28:23.347 回答