Revealing the Programmer's Coding Secret: A Guide to PHP Octalism

PHP Octal: Decrypt the programmer's encoding password

Introduction:
In the world of programmers, coding is one of the most basic skills. Coding enables computers to understand and execute our instructions to complete various tasks. However, sometimes programmers may need to encrypt data to ensure data security. Base encoding is one of the commonly used encryption methods. This article will introduce some common operations on base encoding in PHP8, as well as specific code examples.

1. What is hexadecimal encoding?
Base is a mathematical counting system based on a certain base. In our daily lives, the most commonly used one is the decimal system, which is a counting system with a base of 10. In addition to decimal, there are also binary (base 2), octal (base 8) and hexadecimal (base 16).

In computer science, binary is the most basic counting system. Computers can only understand binary 0s and 1s, so it is the basis for all computer coding. However, binary representation is cumbersome and difficult to read and understand. In order to facilitate the use and understanding of programmers, base encodings such as octal and hexadecimal are widely used in computer programming.

2. Base encoding operations in PHP8
PHP8 provides a wealth of base encoding operation functions, allowing programmers to easily convert and process base encodings. The following are examples of the use of some common base encoding operation functions:

1. bin2oct($binary): Convert a binary string to an octal string.

   $binary = '101011101';
   $octal = bin2oct($binary);
   echo $octal; // 输出：527

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2. oct2bin($octal): Convert an octal string to a binary string.

   $octal = '527';
   $binary = oct2bin($octal);
   echo $binary; // 输出：101011101

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3. bin2hex($binary): Convert a binary string to a hexadecimal string.

   $binary = '101011101';
   $hex = bin2hex($binary);
   echo $hex; // 输出：2BD

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4. hex2bin($hex): Convert a hexadecimal string to a binary string.

   $hex = '2BD';
   $binary = hex2bin($hex);
   echo $binary; // 输出：101011101

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5. decbin($decimal): Convert a decimal number to a binary string.

   $decimal = 297;
   $binary = decbin($decimal);
   echo $binary; // 输出：100101001

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6. bindec($binary): Convert a binary string to a decimal number.

   $binary = '100101001';
   $decimal = bindec($binary);
   echo $decimal; // 输出：297

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3. Practical application examples
The above are some basic base encoding operation functions. Next, we will introduce a practical application example: using octal encoding to encrypt and decrypt passwords. .

1. Encryption password:

   $password = 'mypassword'; // 待加密的密码
   $encryptedPassword = bin2oct($password);
   echo $encryptedPassword; // 输出：21,15,027,027,013,023,017,035,012,006

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2. Decryption password:

   $encryptedPassword = '21,15,027,027,013,023,017,035,012,006'; // 待解密的密码
   $octalArray = explode(',', $encryptedPassword);
   $decryptedPassword = '';
   foreach ($octalArray as $octal) {
    $decryptedPassword .= oct2bin($octal);
   }
   echo $decryptedPassword; // 输出：mypassword

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Through the above code example, we It can be seen that the password string can be encrypted into a series of octal numbers using octal encoding, and then restored back to the original password string through the decryption operation.

Conclusion:
Base coding is one of the techniques that programmers often use in daily programming. By making full use of the base encoding operation functions provided by PHP8, programmers can easily convert and process base encodings. In practical applications, hexadecimal encoding can be used to encrypt and decrypt sensitive information to improve data security. I hope the introduction and examples in this article can help programmers decrypt and apply hexadecimal encoding in actual projects.

Reference materials:

• PHP official documentation: https://www.php.net/manual/en/ref.math.php

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