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[问题] strpos() 报警告提示 [原因] PHP8.0环境下 strpos()第一个参数不允许传递 null [处理] 使用空合并运算符，赋予默认值空字符串 [结果] 警告消失
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[问题] strpos() 报警告提示
[原因] PHP8.0环境下 strpos()第一个参数不允许传递 null
[处理] 使用空合并运算符，赋予默认值空字符串
[结果] 警告消失