PHP中常用数组处理方法实例分析_PHP
1.array_shift()将数组的第一个单元移出再返回,这对有时候数组的第一个单元要单独处理很方便。
复制代码 代码如下:
$tmparray = array("1", "2", "3", "4");
$tmparray = array_shift ($tmparray);
print_r($tmparray);
?>
2.array_chunk() 将一个数组分割成多个数组 ,后面参数控制数组单元数目。
复制代码 代码如下:
$tmparray = array('a', 'b', 'c', 'd', 'e');
print_r(array_chunk($tmparray, 2));
?>
这个函数在有些循环的地方很好用,比如我要把取得的数据放成N排,M列。要是我们直接循环肯定不行,当然用嵌套循环可以实现,但是太麻烦,要是先用 array_chunk()这个函数先处理再返回新的数组,就很方便了。
3.array_push()将传入的值压入array的末尾。
复制代码 代码如下:
$tmparray = array ("a", "b");
array_push ($tmparray, "c", "d");
print_r($tmparray);//Array([0] => a[1] =>b[2] =>c[3] =>d)
?>
4.array_unshift() 将传入的单元整体插入到数组中
复制代码 代码如下:
$tmparray= array ("a", "b");
$resarray = array_unshift ($tmparray, "c", "d");
print_r($resarray )//Array([0] => a[1] =>b[2] =>c[3] =>d)
?>
5.array_unique对数组去重,并返回一个新的数组
复制代码 代码如下:
$tmparray = ("a" => "a","b" => "b","c" => "c","d" => "b");
$resarray = array_unique($tmparray);//("a" => "a","b" => "b","c" => "c");
?>

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

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

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

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,

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.

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.
