php decimal conversion functions are as follows: bindec() — Convert binary to decimal decbin() — Convert decimal to binary dechex() — Convert decimal to hexadecimal decoct() — Convert decimal to octal hexdec() — Ten Convert hexadecimal system to decimal system octdec() — Convert octal system to decimal system base_convert() – Convert numbers between any base systems. The application instructions are as follows: 1. Explanation of decimal system (decimal system) conversion function 1. Decimal system to binary system decbin() function, The following example echo decbin(12); //Output 1100 echo decbin(26); //Output 11010 decbin (PHP 3, PHP 4, PHP 5) decbin --
1. PHP base conversion function
Introduction: PHP base conversion function is as follows: bindec() — Binary conversion to decimal decbin() — Convert decimal to binary dechex() — Convert decimal to hexadecimal decoct() — Convert decimal to octal hexdec() — Convert hex to decimal octdec() — Convert octal to decimal base_convert( )– The application of converting numbers between arbitrary base systems is explained as follows: 1. Decimal system conversion function...
Introduction: php, function: A large summary of PHP mathematical operation functions. Classic. Worth collecting: This article summarizes and analyzes PHP mathematical operations. function. Share it with everyone for your reference, the details are as follows: 1. Description of commonly used functions: Abs: Get the absolute value. Acos: Get the arc cosine value. Asin: Get the arcsine value. Atan: Get the arctangent value. Atan2: Calculates the arctangent of a two number. base_convert: Convert the carry method of the number. BinDec: Convert binary to decimal. Ceil: Calculates the smallest integer greater than the specified number. Cos: cosine calculation. DecBin: Convert decimal to binary. DecHe
3. Analyze the conversion function between the carry systems that comes with PHP_PHP Tutorial
Introduction: Analyze the conversion function between PHP's own carry systems. bindec() -- Convert binary to decimal decbin() -- Convert decimal to binary dechex() -- Convert decimal to hexadecimal decoct() -- Convert decimal to octal hexdec() -- Hexadecimal
Introduction: PHP function ip2long conversion When the IP value is too large, a negative number is generated. // Use sprintf to return an unsigned decimal number $long = sprintf("%u",ip2long($ip)); // First convert to binary and then convert to decimal $long = bindec(decbin(ip2long($ip)) );
5. php function accumulation summary
Introduction: Math function: 10 commonly used ones marked in red. abs — Absolute acos — Inverse cosine acosh — Inverse hyperbolic cosine asin — Arc sine asinh — Inverse hyperbolic sine atan2 — Arc tangent of two parameters atan — Arc tangent atanh — Inverse hyperbolic tangent base_convert — Convert between arbitrary bases Numeric bindec - Binary to decimal conversion
6. How does PHP send a byte to a certain port of an IP
Introduction: How does PHP send a byte to a certain port of a certain IP? For example, if you send a byte to the 2012 port of 202.117.120.241, the 8 bits of the byte are 00100000. How to implement this? ------Solution--------------------$fp = fsoctopen('202.117.120.241', 2012);fwrite($fp, chr(bindec ('001
7. Convert binary data to decimal string
Introduction: Convert binary data to decimal string for help I have a string of Base64 data that is decoded into binary data. How can I convert this string of binary data into decimal and then output it as a string? I tried the bindec() function, but what I got was 0. Very It’s puzzling. I’ve tried other base conversion functions, but they don’t seem to work. Here’s my Base64 original data V3FwMbiBTiYKVBXgO68BwSRWUXQETmISFVKm
8. ! 01 Function to convert a long string into a hexadecimal string
Introduction: Help, help! 01 The function that converts a long string into a hexadecimal string is as mentioned in the title. Is there such a function in PHP? ------Solution idea---------------- ------The long string of 01 characters is a binary string. It can be converted into a decimal number using bindec. The decimal number can be converted into a decimal number using dechex. 
9. Analysis PHP’s built-in conversion function between carry systems
#Introduction: Analyze the conversion function between PHP’s built-in carry systems. bindec() -- Convert binary to decimal decbin() -- Convert decimal to binary dechex() -- Convert decimal to hexadecimal decoct() -- Convert decimal to octal hexdec() -- Hexadecimal
10. Convert binary data to decimal string
Introduction: Convert binary data to decimal string for help I have a string of Base64 After the data is decoded, it is binary data. How can I convert this string of binary data into decimal and then output it as a string? I tried the bindec() function, but what I got was 0. It’s very confusing. Other decimal conversions I have also tried the functions, but they don’t seem to work. Here is my Base64 original data V3FwMbiBTiYKVBXgO68BwSRWUXQETmISFVKm
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PHP is used to build dynamic websites, and its core functions include: 1. Generate dynamic content and generate web pages in real time by connecting with the database; 2. Process user interaction and form submissions, verify inputs and respond to operations; 3. Manage sessions and user authentication to provide a personalized experience; 4. Optimize performance and follow best practices to improve website efficiency and security.

PHP uses MySQLi and PDO extensions to interact in database operations and server-side logic processing, and processes server-side logic through functions such as session management. 1) Use MySQLi or PDO to connect to the database and execute SQL queries. 2) Handle HTTP requests and user status through session management and other functions. 3) Use transactions to ensure the atomicity of database operations. 4) Prevent SQL injection, use exception handling and closing connections for debugging. 5) Optimize performance through indexing and cache, write highly readable code and perform error handling.

Using preprocessing statements and PDO in PHP can effectively prevent SQL injection attacks. 1) Use PDO to connect to the database and set the error mode. 2) Create preprocessing statements through the prepare method and pass data using placeholders and execute methods. 3) Process query results and ensure the security and performance of the code.

PHP and Python have their own advantages and disadvantages, and the choice depends on project needs and personal preferences. 1.PHP is suitable for rapid development and maintenance of large-scale web applications. 2. Python dominates the field of data science and machine learning.

PHP is widely used in e-commerce, content management systems and API development. 1) E-commerce: used for shopping cart function and payment processing. 2) Content management system: used for dynamic content generation and user management. 3) API development: used for RESTful API development and API security. Through performance optimization and best practices, the efficiency and maintainability of PHP applications are improved.

PHP makes it easy to create interactive web content. 1) Dynamically generate content by embedding HTML and display it in real time based on user input or database data. 2) Process form submission and generate dynamic output to ensure that htmlspecialchars is used to prevent XSS. 3) Use MySQL to create a user registration system, and use password_hash and preprocessing statements to enhance security. Mastering these techniques will improve the efficiency of web development.

PHP and Python each have their own advantages, and choose according to project requirements. 1.PHP is suitable for web development, especially for rapid development and maintenance of websites. 2. Python is suitable for data science, machine learning and artificial intelligence, with concise syntax and suitable for beginners.

PHP is still dynamic and still occupies an important position in the field of modern programming. 1) PHP's simplicity and powerful community support make it widely used in web development; 2) Its flexibility and stability make it outstanding in handling web forms, database operations and file processing; 3) PHP is constantly evolving and optimizing, suitable for beginners and experienced developers.


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