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laravel中Excel表格导入与导出功能。

function secsToStr($secs) { $r = ''; if($secs>=86400){$days=floor($secs/86400); $secs=$secs%86400; $r=$days.' day'; if($days1){$r.='s';} if($secs>0){$r.=', ';}} if($secs>=3