search
HomeBackend DevelopmentPHP TutorialRounding function code in PHP (floor function, ceil function, round and intval), ceilintval_PHP tutorial

Rounding function code in php (floor function, ceil function, round and intval), ceilintval

The combination of floor function and ceil function can make the data processed by PHP more real and reliable.

1. Let’s look at the floor function first:

Syntax:

float floor (float value)

Description:

Returns the next integer not greater than value, and rounds the decimal part of value. The type returned by floor() is still float because the range of float values ​​is usually larger than that of integer.

floor() example 1

<&#63;php 
 echo floor(1.6); // will output "1" 
 echo floor(-1.6); // will output "-2" 
&#63;>

floor() example 2

<&#63;php
echo(floor(0.60));
echo(floor(0.40));
echo(floor(5));
echo(floor(5.1));
echo(floor(-5.1));
echo(floor(-5.9))
&#63;>

Output:
0
0
5
5
-6
-6

2. Ceil function:

Syntax:

float ceil (float value)

Description:

Returns the next integer that is not less than value. If value has a decimal part, it is rounded up by one digit. The type returned by ceil() is still float because the range of float values ​​is usually larger than that of integer.

ceil() Example:

<&#63;php 
echo ceil(4.3);  // 5 
echo ceil(9.999); // 10 
echo ceil(-3.14); // -3 
&#63;>

See the difference between these two functions? .

We will often use it when paginating
//Page number calculation:

  $lastpg=ceil($totle/$displaypg); //最后页,也是总页数,用ceil就方便多了。
  $lastpg=$lastpg &#63; $lastpg : 1; //没有显示条目,置最后页为1 
  $page=min($lastpg,$page); 
  $prepg=$page-1; //上一页 
  $nextpg=($page==$lastpg &#63; 0 : $page+1); //下一页 
  $firstcount=($page-1)*$displaypg; 

Of course, if you need to specify the accuracy, you need to use the round function.

3. round function:

Syntax:

float round ( float val [, int precision] )

Description:

Returns val rounded to the specified precision (the number of decimal digits after the decimal point). precision can also be negative or zero (default).

round() example

<&#63;php 
echo round(3.4);     // 3 
echo round(3.5);     // 4 
echo round(3.6);     // 4 
echo round(3.6, 0);   // 4 
echo round(1.95583, 2); // 1.96 
echo round(1241757, -3); // 1242000 
echo round(5.045, 2);  // 5.05 
echo round(5.055, 2);  // 5.06 
&#63;>

4. intval—convert variables into integer types

Convert the variable to integer type.

Syntax: int intval(mixed var, int [base]);

Return value: integer

Function type: PHP system function

Content Description


This function can convert variables into integer types. The omitted parameter base is the base of the conversion, with a default value of 10. The converted variable var can be any type variable except an array or class.

Example intval()

<&#63;php 
echo intval(4.3); //4 
echo intval(4.6); // 4 
&#63;> 

Note: If intval is a character type, it will be automatically converted to 0, such as

intval('abc');

Output result 0

If yes

intval('5fd');

The output result is

5

What is the difference between the ceil function and the intval function in php?

float ceil (float value) ceil returns the smallest integer that is not less than value. The return value is still float type int intval (mixed value [, int base]) intval is used to obtain the integer value of the variable, through base conversion (default is decimal), returns the integer value of the variableecho intval(42); // 42
echo intval(4.2); // 4
echo intval('42'); / / 42
echo intval('+42'); // 42
echo intval('-42'); // -42
echo intval(042); // 34
echo intval ('042'); // 42
echo intval(1e10); // 1410065408
echo intval('1e10'); // 1
echo intval(0x1A); // 26
echo intval(42000000); // 42000000
echo intval(42, 8); // 42
echo intval('42', 8); // 34
?>

What is the difference between the ceil function and the intval function in php?

ceil is rounded to the nearest integer, intval gets the integer value of the variable
ceil(3.33)=4;
intval(3.33)=3;
ceil(3.9)=4;
intval (3.9)=3;

www.bkjia.comtruehttp: //www.bkjia.com/PHPjc/840628.htmlTechArticleRounding function code in php (floor function, ceil function, round and intval), ceilintval floor function and ceil function Together, they can make the data processed by PHP more authentic and reliable. ...
Statement
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
How does PHP type hinting work, including scalar types, return types, union types, and nullable types?How does PHP type hinting work, including scalar types, return types, union types, and nullable types?Apr 17, 2025 am 12:25 AM

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values ​​and handle functions that may return null values.

How does PHP handle object cloning (clone keyword) and the __clone magic method?How does PHP handle object cloning (clone keyword) and the __clone magic method?Apr 17, 2025 am 12:24 AM

In PHP, use the clone keyword to create a copy of the object and customize the cloning behavior through the \_\_clone magic method. 1. Use the clone keyword to make a shallow copy, cloning the object's properties but not the object's properties. 2. The \_\_clone method can deeply copy nested objects to avoid shallow copying problems. 3. Pay attention to avoid circular references and performance problems in cloning, and optimize cloning operations to improve efficiency.

PHP vs. Python: Use Cases and ApplicationsPHP vs. Python: Use Cases and ApplicationsApr 17, 2025 am 12:23 AM

PHP is suitable for web development and content management systems, and Python is suitable for data science, machine learning and automation scripts. 1.PHP performs well in building fast and scalable websites and applications and is commonly used in CMS such as WordPress. 2. Python has performed outstandingly in the fields of data science and machine learning, with rich libraries such as NumPy and TensorFlow.

Describe different HTTP caching headers (e.g., Cache-Control, ETag, Last-Modified).Describe different HTTP caching headers (e.g., Cache-Control, ETag, Last-Modified).Apr 17, 2025 am 12:22 AM

Key players in HTTP cache headers include Cache-Control, ETag, and Last-Modified. 1.Cache-Control is used to control caching policies. Example: Cache-Control:max-age=3600,public. 2. ETag verifies resource changes through unique identifiers, example: ETag: "686897696a7c876b7e". 3.Last-Modified indicates the resource's last modification time, example: Last-Modified:Wed,21Oct201507:28:00GMT.

Explain secure password hashing in PHP (e.g., password_hash, password_verify). Why not use MD5 or SHA1?Explain secure password hashing in PHP (e.g., password_hash, password_verify). Why not use MD5 or SHA1?Apr 17, 2025 am 12:06 AM

In PHP, password_hash and password_verify functions should be used to implement secure password hashing, and MD5 or SHA1 should not be used. 1) password_hash generates a hash containing salt values ​​to enhance security. 2) Password_verify verify password and ensure security by comparing hash values. 3) MD5 and SHA1 are vulnerable and lack salt values, and are not suitable for modern password security.

PHP: An Introduction to the Server-Side Scripting LanguagePHP: An Introduction to the Server-Side Scripting LanguageApr 16, 2025 am 12:18 AM

PHP is a server-side scripting language used for dynamic web development and server-side applications. 1.PHP is an interpreted language that does not require compilation and is suitable for rapid development. 2. PHP code is embedded in HTML, making it easy to develop web pages. 3. PHP processes server-side logic, generates HTML output, and supports user interaction and data processing. 4. PHP can interact with the database, process form submission, and execute server-side tasks.

PHP and the Web: Exploring its Long-Term ImpactPHP and the Web: Exploring its Long-Term ImpactApr 16, 2025 am 12:17 AM

PHP has shaped the network over the past few decades and will continue to play an important role in web development. 1) PHP originated in 1994 and has become the first choice for developers due to its ease of use and seamless integration with MySQL. 2) Its core functions include generating dynamic content and integrating with the database, allowing the website to be updated in real time and displayed in personalized manner. 3) The wide application and ecosystem of PHP have driven its long-term impact, but it also faces version updates and security challenges. 4) Performance improvements in recent years, such as the release of PHP7, enable it to compete with modern languages. 5) In the future, PHP needs to deal with new challenges such as containerization and microservices, but its flexibility and active community make it adaptable.

Why Use PHP? Advantages and Benefits ExplainedWhy Use PHP? Advantages and Benefits ExplainedApr 16, 2025 am 12:16 AM

The core benefits of PHP include ease of learning, strong web development support, rich libraries and frameworks, high performance and scalability, cross-platform compatibility, and cost-effectiveness. 1) Easy to learn and use, suitable for beginners; 2) Good integration with web servers and supports multiple databases; 3) Have powerful frameworks such as Laravel; 4) High performance can be achieved through optimization; 5) Support multiple operating systems; 6) Open source to reduce development costs.

See all articles

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

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
1 months agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Chat Commands and How to Use Them
1 months agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

mPDF

mPDF

mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

Dreamweaver Mac version

Dreamweaver Mac version

Visual web development tools

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment