$aa[bar] will report an error, right? PHP will consider bar as a constant.

Question

手机用户1628658718 · Answer

If you don’t add single quotes, there will be no error, and the results will be output as usual, but there will be a warning to remind you to add single quotes

Tngtion · Answer

Variables with $

Strings with quotes

That’s either an array, a constant or a built-in function, right?

$aa[bar] will report an error, right? PHP will consider bar as a constant.

reply all(2)I'll reply