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为什么有的echo加括号，有的不加？
Why do some echoes add brackets and some don’t? -PHP Chinese website Q&A-Why do some echo add brackets and some don't? -PHP Chinese website Q&A
Please watch and learn.
echo 是一个语言结构，有无括号均可使用：echo 或 echo()。
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Why do some echoes add brackets and some don’t? -PHP Chinese website Q&A-Why do some echo add brackets and some don't? -PHP Chinese website Q&A
Please watch and learn.
echo 是一个语言结构，有无括号均可使用：echo 或 echo()。