**一.函数声明** ``` str_starts_with ( string $haystack , string $needle ) : bool ``` **二.函数使用** ``` var_dump(str_starts_with($str,'name')); var_dump(str_ends_with($str,'php8')); ``` **三.命名参数** ``` var_dump(str_starts_with(haystack:$str,needle:'my')); var_dump(str_ends_with(haystack:$str,needle:'8')); ```   **配套的PHP8新特性详解视频教程，请查看以下专辑** 链接：[https://www.ixigua.com/6937490165329822219](https://www.ixigua.com/6937490165329822219)