search
Homephp教程php手册PHP 5.5 beta4 发布

简单了解下 PHP 5.5 的新特性: (1)添加了 Generator。Generator 是一种可以返回迭代器(Iterator)的生成器。并为此添加了关键字 yield。 (2)添加 finally 关键字。也就是 try ?catch finally 套装 … (3)foreach 支持 list() 函数。比如:foreach ($

简单了解下 PHP 5.5 的新特性:

(1)添加了 Generator。Generator 是一种可以返回迭代器(Iterator)的生成器。并为此添加了关键字 yield。

(2)添加 finally 关键字。也就是 try ?catch finally 套装 …

(3)foreach 支持 list() 函数。比如:foreach ($array as list($a, $b)) 这种。

(4)empty() 支持任何表达式。这样看来 empty 开始像函数了,现在的 empty(null) 都是致命错误。

(5)array 和 ?string 的直接量能直接引用。如 echo [1, 2, 3][0] 和 echo ‘PHP’[0]

(6)新的密码 hash Api;还有改进了 GD。

总结:PHP5.5 不是一次主要的升级,但都挺实用的。

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

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

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

EditPlus Chinese cracked version

EditPlus Chinese cracked version

Small size, syntax highlighting, does not support code prompt function

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

Atom editor mac version download

Atom editor mac version download

The most popular open source editor

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools