Let's talk about how to disable code viewing in PHP (code example)

PHP is a commonly used server-side programming language that is often used together with front-end languages ​​such as HTML and CSS to build various websites and applications. During the development process, programmers often need to review code written by themselves or others to debug or modify it. However, sometimes, for reasons such as protecting code security or maintaining server security, it is necessary to prohibit certain users or programs from viewing PHP code.

So, how to write the code to prohibit viewing code in PHP?

First of all, in order to ensure the function of prohibiting viewing of PHP code, it is recommended to store the code in a folder other than the root directory of the website. Because when accessing a website, all files in the website root directory can be directly accessed. If they are stored in a non-website root directory, security can be increased.

Secondly, in the PHP code, we can use the following methods to prohibit viewing the code:

Method 1: prohibit through the Apache configuration file

Can be used in the Apache Add the following code to the configuration file (httpd.conf file):

<Files *.php>
   deny from all
</Files>

The meaning of this code is: prohibit everyone from accessing all PHP files. This method is very effective because Apache will first check the httpd.conf file before executing the file request. Setting it here can ensure that all PHP files will be prohibited from viewing. The disadvantage is that if you need to view the code, you have to modify the file configuration, which is more cumbersome.

Method 2: Put the PHP code into a class

Putting the PHP code into a class can effectively prohibit non-object access to the code. The code is as follows:

class SecretCode {
   private $code = "这里是php代码";
   function showCode($password) {
      if($password != "mypassword") {
         exit("访问被拒绝");
      }
      echo "$this->code";
   }
}

$myCode = new SecretCode();
$myCode->showCode("mypassword");

In the above code, the PHP code is encapsulated in a class, and the code will only be displayed when the showCode() method is called and the correct password is entered. The advantage of this method is that it can effectively control the security of the code. The disadvantage is that for some people, requiring additional password operations will seem a bit cumbersome and the development cost is relatively high.

Method 3: Use .htaccess to ban

Using .htaccess files can control file access very flexibly without modifying the server configuration file. Put the following code into the .htaccess file:

<Files *.php>
  Order deny,allow
  Deny from all
</Files>

The meaning of this code is: prohibit everyone from accessing all PHP files. The advantage of this method is that it can flexibly control file access permissions and will not affect the operation of other websites or servers. The disadvantage is that it may conflict with other settings and requires attention.

Summary:

Because PHP is an open source language, there are still some difficulties in program protection. However, we can improve the security of the code through some methods to protect PHP files from being requested or operated by unauthorized users or programs. You can choose the appropriate method to use the above three methods according to the needs of your own project to achieve better results.

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