PHP中三点(...)的含义 [英] Meaning of Three dot (...) in PHP

问题描述

PHP中的三点(...)是什么意思?

What is the meaning of Three dot (...) in PHP ?

当我在服务器中安装Magento 2时，出现错误.检查代码，发现有一个三点(...)，这会产生错误.我在下面提到了代码

While I am installing Magento 2 in my Sever I got an error. Investigate the code and found that there is a Three dot (...), which is producing the error. I mentioned the code below

return new $type(...array_values($args));

推荐答案

...$str被称为此功能允许您捕获函数可变数量的参数，并根据需要传递传入的普通"参数.举个例子最容易看到:

This feature allows you to capture a variable number of arguments to a function, combined with "normal" arguments passed in if you like. It's easiest to see with an example:

function concatenate($transform, ...$strings) {
    $string = '';
    foreach($strings as $piece) {
        $string .= $piece;
    }
    return($transform($string));
}

echo concatenate("strtoupper", "I'd ", "like ", 4 + 2, " apples");
// This would print:
// I'D LIKE 6 APPLES

函数声明中的参数列表中包含...运算符，它的基本含义是"...，其他所有内容都应放入$ strings中".您可以向该函数传递2个或更多参数，第二个及后续参数将添加到$ strings数组中，可供使用.

The parameters list in the function declaration has the ... operator in it, and it basically means " ... and everything else should go into $strings". You can pass 2 or more arguments into this function and the second and subsequent ones will be added to the $strings array, ready to be used.

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