Home Backend Development PHP Tutorial Summary of PHP Math API methods

Summary of PHP Math API methods

Jul 28, 2016 am 08:26 AM
rand srand

Current number of APIs

49

Common calculations (11)

<code><span>min</span> — 找出最小值
<span>max</span> — 找出最大值
<span>abs</span> — 绝对值

round — 对浮点数进行四舍五入
<span>ceil</span> — 返回大于或者等于指定表达式的最小整数,天花板函数
<span>floor</span> —返回小于或者等于指定表达式的最大整数,地板函数

intdiv — 对除法结果取整,返回商
<span>fmod</span> — 返回除法的浮点数余数,返回余数

is_nan — 判断是否为合法数值
<span>hypot</span> — 计算一直角三角形的斜边长度
<span>sqrt</span> — 平方根</code>
Copy after login

Angle, radians (3)

<code><span>pi</span> — 得到圆周率值
deg2rad — 将角度转换为弧度
rad2deg — 将弧度数转换为相应的角度数</code>
Copy after login

Base conversion (7)

<code>base_convert — 在任意进制之间转换数字
decbin — 十进制转换为二进制
bindec — 二进制转换为十进制

decoct — 十进制转换为八进制
octdec — 八进制转换为十进制

dechex — 十进制转换为十六进制
hexdec — 十六进制转换为十进制</code>
Copy after login

Random numbers (7)

<code>lcg_value — 组合线性同余发生器,返回范围为 (<span>0</span>, <span>1</span>) 的一个伪随机数
<span>rand</span> — 产生一个随机整数,如果没有提供可选参数 min 和 max,<span>rand</span>() 返回 <span>0</span> 到 RAND_MAX 之间的伪随机整数。
mt_rand — 生成更好的随机整数
getrandmax — 显示随机数最大的可能值
mt_getrandmax — 显示随机数的最大可能值

<span>srand</span> — 播下随机数发生器种子,自 PHP <span>4.2</span>.<span>0</span> 起,不再需要用 <span>srand</span>() 或 mt_srand() 函数给随机数发生器播种,现在已自动完成
mt_srand — 播下一个更好的随机数发生器种子(Mersenne Twister)</code>
Copy after login

Logarithms (3)

<code><span>log</span> — 自然对数
<span>log10</span> — 以 <span>10</span> 为底的对数
log1p — 返回 <span>log</span>(<span>1</span> + <span>number</span>),甚至当 <span>number</span> 的值接近零也能计算出准确结果</code>
Copy after login

Exponent(3)

<code><span>exp</span> — 计算 e 的指数
expm1 — 返回 <span>exp</span>(<span>number</span>) - <span>1</span>,甚至当 <span>number</span> 的值接近零也能计算出准确结果
pow — 指数表达式</code>
Copy after login

tangent sine cosine(13)

<code><span>tan</span> — 正切
<span>atan</span> — 反正切
<span>tanh</span> — 双曲正切
<span>atanh</span> — 反双曲正切
<span>atan2</span> — 两个参数的反正切

<span>sin</span> — 正弦
<span>asin</span> — 反正弦
<span>sinh</span> — 双曲正弦
<span>asinh</span> — 反双曲正弦

<span>cos</span> — 余弦
<span>acos</span> — 反余弦
<span>cosh</span> — 双曲余弦
<span>acosh</span> — 反双曲余弦</code>
Copy after login

finite value, infinite value(2)

<code>is_finite — 判断是否为有限值
is_infinite — 判断是否为无限值</code>
Copy after login
').addClass('pre-numbering').hide(); $(this).addClass('has-numbering').parent().append($numbering); for (i = 1; i ').text(i)); }; $numbering.fadeIn(1700); }); });

The above has introduced a summary of the PHP Math API methods, including aspects of the content. I hope it will be helpful to friends who are interested in PHP tutorials.

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

Video Face Swap

Video Face Swap

Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

Hot Topics

Java Tutorial
1655
14
PHP Tutorial
1252
29
C# Tutorial
1225
24
Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

How does session hijacking work and how can you mitigate it in PHP? How does session hijacking work and how can you mitigate it in PHP? Apr 06, 2025 am 12:02 AM

Session hijacking can be achieved through the following steps: 1. Obtain the session ID, 2. Use the session ID, 3. Keep the session active. The methods to prevent session hijacking in PHP include: 1. Use the session_regenerate_id() function to regenerate the session ID, 2. Store session data through the database, 3. Ensure that all session data is transmitted through HTTPS.

What is REST API design principles? What is REST API design principles? Apr 04, 2025 am 12:01 AM

RESTAPI design principles include resource definition, URI design, HTTP method usage, status code usage, version control, and HATEOAS. 1. Resources should be represented by nouns and maintained at a hierarchy. 2. HTTP methods should conform to their semantics, such as GET is used to obtain resources. 3. The status code should be used correctly, such as 404 means that the resource does not exist. 4. Version control can be implemented through URI or header. 5. HATEOAS boots client operations through links in response.

How do you handle exceptions effectively in PHP (try, catch, finally, throw)? How do you handle exceptions effectively in PHP (try, catch, finally, throw)? Apr 05, 2025 am 12:03 AM

In PHP, exception handling is achieved through the try, catch, finally, and throw keywords. 1) The try block surrounds the code that may throw exceptions; 2) The catch block handles exceptions; 3) Finally block ensures that the code is always executed; 4) throw is used to manually throw exceptions. These mechanisms help improve the robustness and maintainability of your code.

What are anonymous classes in PHP and when might you use them? What are anonymous classes in PHP and when might you use them? Apr 04, 2025 am 12:02 AM

The main function of anonymous classes in PHP is to create one-time objects. 1. Anonymous classes allow classes without names to be directly defined in the code, which is suitable for temporary requirements. 2. They can inherit classes or implement interfaces to increase flexibility. 3. Pay attention to performance and code readability when using it, and avoid repeatedly defining the same anonymous classes.

What is the difference between include, require, include_once, require_once? What is the difference between include, require, include_once, require_once? Apr 05, 2025 am 12:07 AM

In PHP, the difference between include, require, include_once, require_once is: 1) include generates a warning and continues to execute, 2) require generates a fatal error and stops execution, 3) include_once and require_once prevent repeated inclusions. The choice of these functions depends on the importance of the file and whether it is necessary to prevent duplicate inclusion. Rational use can improve the readability and maintainability of the code.

Explain different error types in PHP (Notice, Warning, Fatal Error, Parse Error). Explain different error types in PHP (Notice, Warning, Fatal Error, Parse Error). Apr 08, 2025 am 12:03 AM

There are four main error types in PHP: 1.Notice: the slightest, will not interrupt the program, such as accessing undefined variables; 2. Warning: serious than Notice, will not terminate the program, such as containing no files; 3. FatalError: the most serious, will terminate the program, such as calling no function; 4. ParseError: syntax error, will prevent the program from being executed, such as forgetting to add the end tag.

PHP and Python: Comparing Two Popular Programming Languages PHP and Python: Comparing Two Popular Programming Languages Apr 14, 2025 am 12:13 AM

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.

See all articles