Summary of filter class instance usage tutorial

What is SQL injection? What I understand as SQL injection is that some people can input malicious parameters to let the background execute this SQL, and then achieve the purpose of obtaining data or destroying the database! To give a simple query example, the background sql is spliced: select * from Test where name='+parameter transfer+'; the front page requires entering name, then the hacker can enter: ';DROP TABLE Test;-- Don't underestimate this paragraph SQL code: select * from Test where name=' ';DROP TABLE Test;--'; is correct and executable in SQL, but after execution, the entire Test table is deleted and the website crashes! The best solution The best solution is not to write concatenated SQL, but to use parameterized SQL, which is recommended for new projects. There is no introduction here. Interested friends can search for it by themselves. The method introduced in this article is suitable for old projects, that is, there are no programs developed using parameterized SQL.

1. ASP.NET filter class SqlFilter to prevent SQL injection

Introduction: This article shares a filtering class SqlFilter that prevents SQL injection, which can prevent injection through POST, GET and Cookies.

2. Good-looking characters php character filtering class, used to filter data input by various users

Introduction : Good-looking characters: Good-looking characters php character filtering class, used to filter data input by various users: The detailed code is as follows: Copy the code as follows:

3. php character filter class, use Used to filter data entered by various users_PHP tutorial

#Introduction: PHP character filtering class, used to filter data entered by various users. The detailed code is as follows: Copy the code as follows: ?php abstract class Filter { //filter parent class private $blackstr = array(); private $whitestr = array(); function filtit($str) {

4. php form sensitive character filtering class, php form filtering_PHP tutorial

Introduction: php form sensitive character filtering class, php form filtering . PHP form sensitive character filtering class, PHP form filtering This example describes the PHP form sensitive character filtering class and its usage. Share it with everyone for your reference. The specific analysis is as follows: Copy code

5. PHP file upload filtering class

Introduction: PHP file download filtering class

6. PHP form security considerations, submitted data filtering

Introduction: PHP form security considerations, submitted data filter PHP filtering and processing of special characters in form submissions http://www.bestlovesky.com/read.php?1002 ? Security of php form submitter http://wenku.baidu.com/view/73b54729647d27284b73513a.html php form validation filter class http://w

##7. Why is the htmlpurifier class library so large in capacity?

Introduction: htmlpurifier Why is the capacity of the class library so large? RT. I wrote a website myself. I wrote a rich text editor and rich text filtering. I really didn’t want to write it myself. I found this class library online and was shocked by the 1.03MB capacity. I have 3 websites. It's not that big. There are 354 files in the standard version, so not all of them should be used, right? What specific files will be used? Is there any other rich text filtering library that is easier to use? ------Solution ideas---------------------

8. php character filtering class, used to filter data input by various users

Introduction: PHP character filtering class, used to filter data input by various users. The detailed code is as follows: Copy the code as follows: ?php abstract class Filter { //filter parent class private $blackstr = array(); private $whitestr = array(); function filtit($str) {

9. php form validation filter class

Introduction: PHP form security considerations, submission data filtering PHP filtering and processing of special characters in form submissions http://www.bestlovesky.com/read.php?1002?php form submission program security http://wenku.baidu.com/view/73b54729647d27284b73513a.htmlphp form validation filter class http://www.zzare

10. PHP file upload filtering class

##Introduction: PHP file download filtering class

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