Security question: Write secure PHP code

If you are a website manager and do not want your website to be attacked by hackers, how can you avoid the destruction of your website? We will refer to the PHP language here to see how to ensure that the website's security is the website owner or practitioner does not want its own website to operate safely. However, in many cases, website development is neglected, it is likely to become a huge security risk for the website. Today, there are many web development tools and languages, and PHP is one of them. The PHP language has unparalleled security features, but it has not attracted the attention of many website developers. Website security can ensure the security of sensitive data of enterprise employees, and even effectively prevent server hijacking and other problems. I will discuss some suggestions for PHP development and hope to help you.

First, the most important thing is to find out various variables and user input data. Many variables you have never noticed may become an excellent way for malware to spread infections. We can assume that some code is not too secure on your website, but it runs normally. Attackers can exploit these vulnerabilities to launch attacks on your website. Do not underestimate these inconspicuous variable names. once these vulnerabilities are exploited by hackers, they not only delete files, but also delete the entire password system or other sensitive information, in the end, it may cause huge damage to the normal operation of the server.

The website administrator must check whether malicious code exists in the content of all files input from the outside, and the database security is also crucial. Database security will certainly involve a lot of SQL injection and other attack methods, which are not described in detail here. if you want to know database security information, I will introduce it in detail as needed.

Magic Quotes

Magic Quotes is useful when processing user file input. When this option is enabled (in your php. ini file), it will separate all single quotes and double quotes, or separate NULL bytes from your input information. When you enable Magic Quote, the question is whether you want your users to apply quotation marks. If you disable Magic Quote, you can analyze the string of user input data in "runtime.

If you are not familiar with PHP, I suggest you enable this function until you have learned how to analyze and present user input data. I personally suggest using the "clear" function I wrote. I will provide you with a template so that you can write a clear function by yourself.

Function clean ($ string) { $ String = stripslashes ($ string ); $ String = htmlentities ($ string ); $ String = strip_tags ($ string ); Return $ string; } ?>