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How create an unique 20 single byte token/key/ID on php?


How create an unique 20 single byte token/key/ID on php?

By : 风吹头飞扬
Date : October 16 2020, 11:12 PM
like below fixes the issue The question is not very clear as to what exactly you want. If you want to generate such a string randomly you can do something like:
code :


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Create smallest unique number from two byte

Create smallest unique number from two byte


By : Albert Hong
Date : March 29 2020, 07:55 AM
This might help you As we all know a byte range is 0 to 255 , Encode:
code :
x = b1 * 256 + b2;
x = x + 10000;
x = x - 10000;
b1 = x >> 8;
b2 = x & 255;
Best way to create unique token in Rails?

Best way to create unique token in Rails?


By : user3078204
Date : March 29 2020, 07:55 AM
hope this fix your issue -- Update --
As of January 9th, 2015. the solution is now implemented in Rails 5 ActiveRecord's secure token implementation.
code :
class ModelName < ActiveRecord::Base

  before_create :generate_token

  protected

  def generate_token
    self.token = loop do
      random_token = SecureRandom.urlsafe_base64(nil, false)
      break random_token unless ModelName.exists?(token: random_token)
    end
  end

end
# app/models/model_name.rb
class ModelName < ActiveRecord::Base
  include Tokenable
end

# app/models/concerns/tokenable.rb
module Tokenable
  extend ActiveSupport::Concern

  included do
    before_create :generate_token
  end

  protected

  def generate_token
    self.token = loop do
      random_token = SecureRandom.urlsafe_base64(nil, false)
      break random_token unless self.class.exists?(token: random_token)
    end
  end
end
Is this a good way to create a unique URL token in PHP.?

Is this a good way to create a unique URL token in PHP.?


By : Gaushmohammad Siddiq
Date : March 29 2020, 07:55 AM
wish help you to fix your issue That seems way more secure than you could ever need it to be (don't know exactly what data you are trying to keep out). If you wanted, you could make the token usable for only one session or however many sessions you feel would be enough to give the visitor. You could make it so that if they use up the token they were given in one session but don't finish what they need to do, they need to get another to go back, if that's reasonable.
What you are doing is plenty for security, however. The only way someone can get the token is if they guess and those tokens are very hard to guess. Not really a huge deal unless you are overly concerned about pirates getting at your info. Since it's a url token, it will be visible to everyone in the email you send it or whatever. You obviously have to make it visible.
CREATE UNIQUE TOKEN(NUMERIC)

CREATE UNIQUE TOKEN(NUMERIC)


By : Susan
Date : March 29 2020, 07:55 AM
hope this fix your issue I have a database where I want to generate unique tokens of six numeric characters. This tokens should be generated each time an invoice number is inserted in the invoice_no column. This would mean that every time I do an insert and the column invoice_no is not null, the token is generated of the numerals. I want the token to be to generate as many tokens as possible without a token being repeated at any instance. , You can create a sequence and use it to produce the tokens:
how to create a unique hash byte value across each record

how to create a unique hash byte value across each record


By : S.Haina
Date : September 26 2020, 07:00 PM
hop of those help? , If you want a unique value in each record, use identity:
code :
CREATE TABLE [dbo].[test] (
    TestId IDENTITY(1, 1) NOT NULL PRIMARY KEY,
    [GroupID] [NVARCHAR](255) NULL,
    [PromoNUM] [FLOAT] NULL
) ON [PRIMARY]
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