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 …
很抱歉,这听起来像是一个非常愚蠢的问题.
但我用Google搜索了网络,并专门搜索了php.net网站和stackoverflow.com网站.
我知道PHP在使用and, or, &&, ||运算符时会进行短路延迟评估,但在PHP手册中它的声明清晰明了？
我发现只有维基百科是唯一的'可信'来源,它说PHP对这些运营商进行了懒惰的评估.