在这两种语法之间，你应该真正选择你喜欢的一种:-)

Between those two syntaxes, you should really choose the one you prefer :-)

就我个人而言，在这种情况下，我会采用您的第二个解决方案(变量插值)，我发现它更易于编写和阅读.

Personally, I would go with your second solution in such a case (Variable interpolation), which I find easier to both write and read.

结果是一样的；即使有性能影响，这些也无关紧要 ¹.

The result will be the same; and even if there are performance implications, those won't matter ¹.

作为旁注，所以我的回答更完整一些:你想要做这样的事情的那一天:

As a sidenote, so my answer is a bit more complete: the day you'll want to do something like this:

echo "Welcome $names!";

PHP 将解释您的代码，就好像您试图使用 $names 变量一样 -- 该变量不存在.- 请注意，它仅在您对字符串使用 "" 而不是 '' 时才有效.

PHP will interpret your code as if you were trying to use the $names variable -- which doesn't exist. - note that it will only work if you use "" not '' for your string.

那天，您需要使用 {}:

echo "Welcome {$name}s!"

无需回退到串联.

还要注意你的第一个语法:

Also note that your first syntax:

echo "Welcome ".$name."!";

可能会优化，避免串联，使用:

Could probably be optimized, avoiding concatenations, using:

echo "Welcome ", $name, "!";

(但是，正如我之前所说，这并不重要......)

_{1 - 除非您要进行数十万次串联与插值 - 否则可能并非如此.}