Let's talk about the security issues between PHP and MySQL injection

Recently, many websites have been exposed to sensitive information due to hacker attacks. One of the attack methods is through MySQL injection. PHP is a popular server-side programming language, often used together with MySQL. Therefore, the security issues between PHP and MySQL injection need to be taken seriously.

What is MySQL injection?

MySQL injection is a technique that exploits program vulnerabilities to modify or read the database. Attackers attempt to disrupt or steal information from a website by modifying or reading data in the database. An attacker can inject some code into a database query via a PHP input form or URL query string. If the website administrator does not take timely measures, the database will be attacked.

How to prevent MySQL injection?

The best solution to prevent MySQL injection is to use MySQL prepared statements. These statements use placeholders in place of variables and separate the variables from the placeholders before execution. This approach allows MySQL to check each user-entered variable before the command is executed, thus preventing injection attacks.

In addition, for enhanced security, the mysqli_real_escape_string() function should be used in PHP code. This function escapes special characters so that they cannot be recognized as query statements by MySQL. This prevents malicious actors from performing SQL injection attacks by entering database query strings.

Remove SQL Injection Attack Code

If your website has suffered a MySQL injection attack, you can use some techniques to eliminate the attack. Here are some common methods:

1. Back up the database: First, you should back up the database before attacking. If an attack causes severe damage, you can recover the database.

2. Find the vulnerability: Next, you should find out the vulnerability used by the attacker. Often you can see attacks in Apache logs. You can also find vulnerabilities by examining input forms, URL pass values, and cookie values ​​in your application code.

3. Disable filtered characters: You can prevent injection attacks by disabling filtering of sensitive characters. You can achieve this using a disable function in your PHP configuration file.

4. Remove the malicious code: Finally, you should remove the SQL injection code used by the attacker. Once it is removed, the attack stops.

To sum up, MySQL injection attack is a common attack method in Internet security. However, with the right defenses and timely response, you can keep your database safe. If your website has been compromised, you can use the methods above to remove and prevent injection attacks.

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