This is a collection of questions that come up every now and then about syntax in PHP. This is also a Community Wiki, so everyone is invited to participate in maintaining this list.
It used to be hard to find questions about operators and other syntax tokens.¹
The main idea is to have links to existing questions on Stack Overflow, so it's easier for us to reference them, not to copy over content from …
我刚刚遇到了来自3v4l的一小段PHP代码:https://3v4l.org/jmrZB
echo 1...1; //10.1
而且我担心我不知道如何解释其结果.为什么这被认为是有效的？