PHP 变量插值与串联
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PHP variable interpolation vs concatenation
提问by Aley
What is the difference between the two following methods (performance, readability, etc.) and what do you prefer?
下面两种方法（性能、可读性等）有什么区别，你更喜欢什么？
echo "Welcome {$name}s!"
vs.
对比
echo "Welcome " . $name . "!";
回答by Borniet
Whatever works best for you works... But if you want to go for speed use this:
什么对你最有效......但是如果你想提高速度，请使用这个：
echo 'Welcome ', $name, '!';
The single quotes tell PHP that no interpretation is needed, and the comma tells PHP to just echo the string, no concatenation needed.
单引号告诉 PHP 不需要解释，逗号告诉 PHP 只回显字符串，不需要连接。
