Table of Contents
PHP中的排序函数sort、asort、rsort、krsort、ksort区别分析,asortrsort
php中各种排序的特点
php 数组函数有那些
Home Backend Development PHP Tutorial PHP中的排序函数sort、asort、rsort、krsort、ksort区别分析,asortrsort_PHP教程

PHP中的排序函数sort、asort、rsort、krsort、ksort区别分析,asortrsort_PHP教程

Jul 13, 2016 am 10:20 AM
php Sorting function

PHP中的排序函数sort、asort、rsort、krsort、ksort区别分析,asortrsort

  sort() 函数用于对数组单元从低到高进行排序。
  rsort() 函数用于对数组单元从高到低进行排序。
  asort() 函数用于对数组单元从低到高进行排序并保持索引关系。
  arsort() 函数用于对数组单元从高到低进行排序并保持索引关系。
  ksort() 函数用于对数组单元按照键名从低到高进行排序。
  krsort() 函数用于对数组单元按照键名从高到低进行排序。

  sort()

  PHP sort() 函数用于对数组单元从低到高进行排序,如果成功则返回 TRUE,失败则返回 FALSE。
  注意:本函数会为排序的数组中的单元赋予新的键名,这将删除原有的键名而不仅是重新排序。
  语法:
  bool sort( array &array [, int sort_flags] )
  可选参数 sort_flags 用于改变排序的行为:
  sort_flags 取值 说明
  SORT_REGULAR 正常比较单元
  SORT_NUMERIC 单元被作为数字来比较
  SORT_STRING 单元被作为字符串来比较
  SORT_LOCALE_STRING 根据当前的区域(locale)设置来把单元当作字符串比较

  例子:

  
  $arr = array("b", "a", "c");
  sort($arr);
  print_r($arr);
  ?>
Copy after login

  运行该例子输出:

  Array ( [0] => a [1] => b [2] => c )
Copy after login

  在本例中, $arr 数组单元被按照字母顺序排序,而数组单元经过排序后,键值重新分配。

  rsort()
  PHP rsort() 函数行为与 sort() 相反,对数组单元进行由高到低排序,请参考 sort() 函数使用。

  asort()
  PHP asort() 函数用于对数组单元从低到高进行排序并保持索引关系,如果成功则返回 TRUE,失败则返回 FALSE。
  语法:
  bool asort( array &array [, int sort_flags] )
  可选参数 sort_flags 用以改变排序的行为,具体参见 sort()。
  例子:
  

  $arr = array("b", "a", "c");
  asort($arr);
  print_r($arr);
  ?>
Copy after login

  运行该例子输出:

  Array ( [1] => a [0] => b [2] => c )
Copy after login

  arsort()
  PHP arsort() 函数行为与 asort() 相反,对数组单元进行由高到低排序并保持索引关系,请参考 asort() 函数使用。

  ksort()
  PHP ksort() 函数用于对数组单元按照键名从低到高进行排序,如果成功则返回 TRUE,失败则返回 FALSE。
  本函数会保留原来的键名,因此常用于关联数组。
  语法:
  bool ksort( array &array [, int sort_flags] )
  可选参数 sort_flags 用以改变排序的行为,具体参见 sort()。
  例子:
  
  

$arr = array("b"=>18, "a"=>20, "c"=>25);
  ksort($arr);
  print_r($arr);
  ?>
Copy after login

  运行该例子输出:

  Array ( [a] => 20 [b] => 18 [c] => 25 )
Copy after login

  krsort()
  PHP krsort() 函数行为与 ksort() 相反,对数组单元按照键名进行由高到低排序,请参考 ksort() 函数使用。

php中各种排序的特点

忽略键名的排序
sort()
rsort()
usort()
保留键名的排序
asort()
arsort()
uasort()
通过键名的排序
ksort()
krsort()
uksort()
按自然数排序
uatsort()
uatcasesort()
随机排序
shuffle()
反向排序给新数组
array_reverse()

东西太多了,只能给你函数名,具体怎麼用请查手册吧
 

php 数组函数有那些

手册为王
常用的:
array_pop,array_push,array_shift,array_unshift
key,current,next,prev,each,end,reset,
sort,rsort,asort,arsort,ksort,krsort
array_diff,array_intersect,array_merge,
array_search,array_key_exists,in_array
array_slice,array_splice,array_rand,
array_unique,array_keys,array_values
count,range,list,shuffle,
 

www.bkjia.comtruehttp://www.bkjia.com/PHPjc/865620.htmlTechArticlePHP中的排序函数sort、asort、rsort、krsort、ksort区别分析,asortrsort sort() 函数用于对数组单元从低到高进行排序。 rsort() 函数用于对数组单元从...
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 Article

Roblox: Bubble Gum Simulator Infinity - How To Get And Use Royal Keys
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Mandragora: Whispers Of The Witch Tree - How To Unlock The Grappling Hook
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
Nordhold: Fusion System, Explained
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

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
1669
14
PHP Tutorial
1273
29
C# Tutorial
1256
24
PHP: A Key Language for Web Development PHP: A Key Language for Web Development Apr 13, 2025 am 12:08 AM

PHP is a scripting language widely used on the server side, especially suitable for web development. 1.PHP can embed HTML, process HTTP requests and responses, and supports a variety of databases. 2.PHP is used to generate dynamic web content, process form data, access databases, etc., with strong community support and open source resources. 3. PHP is an interpreted language, and the execution process includes lexical analysis, grammatical analysis, compilation and execution. 4.PHP can be combined with MySQL for advanced applications such as user registration systems. 5. When debugging PHP, you can use functions such as error_reporting() and var_dump(). 6. Optimize PHP code to use caching mechanisms, optimize database queries and use built-in functions. 7

PHP vs. Python: Understanding the Differences PHP vs. Python: Understanding the Differences Apr 11, 2025 am 12:15 AM

PHP and Python each have their own advantages, and the choice should be based on project requirements. 1.PHP is suitable for web development, with simple syntax and high execution efficiency. 2. Python is suitable for data science and machine learning, with concise syntax and rich libraries.

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.

PHP in Action: Real-World Examples and Applications PHP in Action: Real-World Examples and Applications Apr 14, 2025 am 12:19 AM

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.

The Enduring Relevance of PHP: Is It Still Alive? The Enduring Relevance of PHP: Is It Still Alive? Apr 14, 2025 am 12:12 AM

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.

PHP and Python: Different Paradigms Explained PHP and Python: Different Paradigms Explained Apr 18, 2025 am 12:26 AM

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP vs. Other Languages: A Comparison PHP vs. Other Languages: A Comparison Apr 13, 2025 am 12:19 AM

PHP is suitable for web development, especially in rapid development and processing dynamic content, but is not good at data science and enterprise-level applications. Compared with Python, PHP has more advantages in web development, but is not as good as Python in the field of data science; compared with Java, PHP performs worse in enterprise-level applications, but is more flexible in web development; compared with JavaScript, PHP is more concise in back-end development, but is not as good as JavaScript in front-end development.

PHP and Python: Code Examples and Comparison PHP and Python: Code Examples and Comparison Apr 15, 2025 am 12:07 AM

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.

See all articles