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PHP 5.5 beta4 发布

Jun 06, 2016 pm 08:09 PM
php release Simple

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。

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