php格式化日期和时间格式化示例分享

//格式化日期
 staticfunctionformatDate($format,$datetime,$week=0){
    $datetime=$datetime>3000?$datetime:strtotime($datetime);
    if($week){
        $weeknames=[
            "日",
            "一",
            "二",
            "三",
            "四",
            "五",
            "六"
        ];
        $format=str_replace("w",$weeknames[date("w",$datetime)],$format);
    }
    returndate($format,$datetime);
 }