What are the implementation methods of security protection in PHP7.0?

PHP is a scripting language widely used in web development. Due to its simplicity, ease of use and high flexibility, it has become the first choice of many developers. However, due to its open nature, PHP is also highly vulnerable to hackers. Therefore, PHP7.0 proposes a more complete security protection mechanism to protect user data and security. This article will introduce in detail the security protection mechanism and implementation methods in PHP7.0.

1. Disable dangerous functions

There are some dangerous functions in PHP, such as eval, system, exec, etc. These functions can execute any code entered by the user, so once hacked Exploitation will have devastating consequences on the system. Therefore, these dangerous functions are disabled in PHP7.0 and can be disabled using the disable_functions configuration.

2. Setting Cookie and Session

Cookie and Session are important means of maintaining state and recording user information in web applications. The HttpOnly and Secure options are enabled by default in PHP7.0, which is a method to prevent Cross-site Scripting (XSS) attacks. Among them, the HttpOnly option prohibits JavaScript from reading Cookie content to prevent XSS attacks; the Secure option requires that Cookies can be transmitted only when HTTPS is used to prevent data from being attacked by a man-in-the-middle.

3. Filter input

In PHP7.0, the global variable array is no longer registered by default, which means that the template directory, uploaded file and other paths can be in the controller Use, thereby increasing code security. In addition, PHP7.0 adds filter_input() and filter_var() functions, which can filter input data to avoid a series of attacks such as cross-site scripting attacks and SQL injections.

4. Database Security

SQL injection attack is a very common attack method, which attacks Web applications by entering malicious SQL statements into the Web application. In PHP7.0, developers can use the PDO (PHP Data Object) class to standardize SQL processing and prevent SQL injection attacks from occurring. At the same time, you can also use prepared statements and stored procedures to enhance database security.

5. File upload

File upload is a common function in Web applications. However, non-standard file upload will bring great security risks to the system. In PHP7.0, developers can limit the size, type, etc. of uploaded files by modifying the php.ini file. In addition, there are other security protection measures for uploaded files, such as MD5 verification of files, storing files in non-website directories, etc.

6. Error handling

PHP7.0 provides a new error handling method, the errors are more accurate, and the errors that exclude users are completely discarded. In addition, error logs can also be sent to a special location to facilitate developers to understand error information in a timely manner. This provides developers with a more rigorous development environment and ensures user data security.

In summary, the security protection mechanism in PHP7.0 is more complete and fully protects user data and security. When developing web applications, developers should have a deep understanding of the security protection mechanism of PHP7.0 and use it reasonably based on actual conditions to improve the security of web applications.

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