Method 1?? Addslashes ();Method 2?? Mysql_escape_string ();Method 3?? Turn on Magic QuotesMethod 4?? Control the data entered by the user, such as:Using intval to prevent SQL injection, intval () can turn variables into integer types for receiving pure integer data$id =intval ($_get[' id ');Method 5?? Use the quote () method of the PDO object to control the data
It is not particularly difficult to prevent the ASP.net application from being hacked into by SQL injection, as long as you filter all the input before using the contents of the form input to construct the SQL command. Filter input can be done in a variety of ways.
⑴ for dynamically constructing
Prerequisite is that we need to have the server's administrative rights, that is, you can modify the php.ini file, the following I would like to introduce the modification of PHP configuration file to prevent SQL injection method has to learn the friend can refer to.
To be safe, you can open the Safe mode of the "php.ini" file, set "Safe_mode=on", and the "displa
Configure get_magic_quotes_gpc in php to prevent SQL injection usage
Get_magic_quotes_gpc (); is to obtain the value of the php environment variable magic_quotes_gpc. If the value is 1, it indicates that the configuration is enabled; if it is 0, it indicates that the configuration is disabled!
Get_magic_quotes_gpc (); the value is 1, indicating that it is
If the user enters a query that is inserted directly into an SQL statement, the application is vulnerable to SQL injection, such as the following example:
Copy CodeThe code is as follows:
$unsafe _variable = $_post[' user_input ');
mysql_query ("INSERT into table (column) VALUES (')." $unsafe _variable. "')");
This is because the user can enter similar value ")
The most common in SQL injection is string stitching, and developers should pay attention to string concatenation, should not be ignored.Error usage 1:sql = "SELECT ID, name from test where id=%d and Name= '%s '"% (ID, name)Cursor.execute (SQL)Error usage 2:sql = "SELECT ID,
userConsole.WriteLine ("Please enter the vehicle code to be queried:"); stringCode =Console.ReadLine (); //Connecting ObjectsSqlConnection conn =NewSqlConnection ("server=.; Database=mydb;user=sa;pwd=123"); //Create Command ObjectSqlCommand cmd =Conn. CreateCommand (); //an SQL statement to the command object//make code= a variableCmd.commandtext ="SELECT * from Car where [email protected]"; //cmd.commandtext = "SELECT * from Car where [em
Specific usage
addslashes prevents SQL injection
Although many domestic PHP programmers are still relying on addslashes to prevent SQL injection, it is recommended that you strengthen the Chinese to prevent
New users ask how to prevent SQL injection by fuzzy query // create a table model
$ News_table = new news ();
// Create the corresponding adapter
$ Db = $ news_table-> getAdapter ();
// Prepare SQL statements
$ SQL = $ db-> quoteInto ("select title, pubDate from news where t
Does the PHP SELECT statement need to use preprocessing to prevent SQL injection?
Reply content:
Does the PHP SELECT statement need to use preprocessing to prevent SQL injection?
Some things you should know about
(1) mysql_real_escape_string -- escape special characters in the strings used in SQL statements, and take into account the connected current character set amp; nbsp; usage: $ SQL = quot; selectco
(1) mysql_real_escape_string -- escape special characters in strings used in SQL statements and take into account the connected current character set
The usage is as f
Creating a Table Model
$news _table=new News ();
Create the appropriate adapter
$db = $news _table->getadapter ();
Prepare the SQL statement.
$sql = $db->quoteinto ("Select Title,pubdate from the news where title like '% $keyword _arr[0]% '");
Get result set
$res = $db->query ($sql)->fetchall ();
I need to fuzzy query, intentionally to take the% number, but also
This article illustrates a simple way to prevent SQL injection in PHP. Share to everyone for your reference, specific as follows:
SQL injection is generally due to the irregular syntax, the problem appears on the SQL statement, a
Tags: lin div esc private void Ace value one format usingSystem;usingSystem.Collections.Generic;usingSystem.ComponentModel;usingSystem.Data;usingSystem.Drawing;usingSystem.Linq;usingSystem.Text;usingSystem.Windows.Forms;usingSystem.Data.SqlClient; namespace_01 parameterized login to prevent SQL injection attacks { Public Partial classForm1:form { PublicForm1 ()
This article mainly introduces the analysis of PHP filter HTML string, to prevent SQL injection, has a certain reference value, now share to everyone, the need for friends can refer to
Http://www.mb5u.com/biancheng/php/php_98728.html
This article is a detailed analysis of the implementation code of the string encoding conversion in PHP, the need for a friend re
In this paper, we introduce the simple implementation of PHP to prevent SQL injection method, combined with examples of PHP to prevent SQL injection of common operational skills and considerations, code with detailed comments to u
This article mainly introduces how to prevent SQL injection in Pyhton. the method described in this article is simple and practical. if you need it, refer to the following code:
C = db. cursor ()Max_price = 5C.exe cute ("SELECT spam, eggs, sausage FROM breakfastWHERE price
Note that the separator between the preceding SQL
Is there any simple way to prevent SQL injection once and for all? I searched it just now and it seems complicated.
Let me talk about my thoughts:
First of all, I don't know if MySQL can add single quotation marks for all types of data. I just tried to add single quotation marks around the integer.
If it is true that all types of data can be enclosed in single
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