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。
原文地址:PHP 5.5 beta4 发布, 感谢原作者分享。

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