JS模仿PHP日期格式化 - 時間戳轉字符串 - 日期字符串轉時間戳 - date('Y-m-d H:i:s', 1529625620)

使用方法

1. 引入下面的JS函數
2. 需要字符串轉時間戳，可以使用var timestamp = (new Date("2018-06-22 08:00:20")).getTime()/1000;
3. 需要時間戳轉字符串，var dateString = formatDate('Y-m-d H:i:s', 1529625620);

 

JS函數

<script type="text/javascript">
    /**
     * JS模仿PHP日期格式化 - 日期轉字符串
     * @description 
     *    打印 formatDate('Y-m-d H:i:s', 1529625620);
     *    即可獲得 '2018-06-22 08:00:20'
     * @param {格式化字符串} format
     *    具體參數請參考 https://www.php.net/manual/zh/function.date.php
     * @param {時間戳} timestamp
     */
    var formatDate = function (format, timestamp) {
        let jsdate = ((timestamp) ? new Date(timestamp * 1000) : new Date());
        let pad = function (n, c) {
            if ((n = n + '').length < c) {
                return new Array(++c - n.length).join('0') + n;
            } else {
                return n;
            }
        };
        let txtWeekdays = ['Sunday', 'Monday', 'Tuesday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'];
        let txtOrdin = {1: 'st', 2: 'nd', 3: 'rd', 21: 'st', 22: 'nd', 23: 'rd', 31: 'st'};
        let txtMonths = ['', 'January', 'February', 'March', 'April', 'May', 'June', 'July', 'August', 'September', 'October', 'November', 'December'];
        let f = {
            // Day
            d: function () {
                return pad(f.j(), 2);
            },
            D: function () {
                return f.l().substr(0, 3);
            },
            j: function () {
                return jsdate.getDate();
            },
            l: function () {
                return txtWeekdays[f.w()];
            },
            N: function () {
                return f.w() + 1;
            },
            S: function () {
                return txtOrdin[f.j()] ? txtOrdin[f.j()] : 'th';
            },
            w: function () {
                return jsdate.getDay();
            },
            z: function () {
                return (jsdate - new Date(jsdate.getFullYear() + '/1/1')) / 864e5 >> 0;
            },

            // Week
            W: function () {
                let a = f.z();
                let b = 364 + f.L() - a;
                let nd2;
                let nd = (new Date(jsdate.getFullYear() + '/1/1').getDay() || 7) - 1;
                if (b <= 2 && ((jsdate.getDay() || 7) - 1) <= 2 - b) {
                    return 1;
                } else {
                    if (a <= 2 && nd >= 4 && a >= (6 - nd)) {
                        nd2 = new Date(jsdate.getFullYear() - 1 + '/12/31');
                        return fromatDate('W', Math.round(nd2.getTime() / 1000));
                    } else {
                        return (1 + (nd <= 3 ? ((a + nd) / 7) : (a - (7 - nd)) / 7) >> 0);
                    }
                }
            },

            // Month
            F: function () {
                return txtMonths[f.n()];
            },
            m: function () {
                return pad(f.n(), 2);
            },
            M: function () {
                return f.F().substr(0, 3);
            },
            n: function () {
                return jsdate.getMonth() + 1;
            },
            t: function () {
                let n;
                if ((n = jsdate.getMonth() + 1) === 2) {
                    return 28 + f.L();
                } else {
                    if ((n & 1 && n < 8) || (!(n & 1) && n > 7)) {
                        return 31;
                    } else {
                        return 30;
                    }
                }
            },

            // Year
            L: function () {
                let y = f.Y();
                return (!(y & 3) && (y % 1e2 || !(y % 4e2))) ? 1 : 0;
            },
            Y: function () {
                return jsdate.getFullYear();
            },
            y: function () {
                return (jsdate.getFullYear() + '').slice(2);
            },

            // Time
            a: function () {
                return jsdate.getHours() > 11 ? 'pm' : 'am';
            },
            A: function () {
                return f.a().toUpperCase();
            },
            B: function () {
                // peter paul koch:
                let off = (jsdate.getTimezoneOffset() + 60) * 60;
                let theSeconds = (jsdate.getHours() * 3600) + (jsdate.getMinutes() * 60) + jsdate.getSeconds() + off;
                let beat = Math.floor(theSeconds / 86.4);
                if (beat > 1000)
                    beat -= 1000;
                if (beat < 0)
                    beat += 1000;
                if ((String(beat)).length === 1)
                    beat = '00' + beat;
                if ((String(beat)).length === 2)
                    beat = '0' + beat;
                return beat;
            },
            g: function () {
                return jsdate.getHours() % 12 || 12;
            },
            G: function () {
                return jsdate.getHours();
            },
            h: function () {
                return pad(f.g(), 2);
            },
            H: function () {
                return pad(jsdate.getHours(), 2);
            },
            i: function () {
                return pad(jsdate.getMinutes(), 2);
            },
            s: function () {
                return pad(jsdate.getSeconds(), 2);
            },
            // Timezone
            O: function () {
                let t = pad(Math.abs(jsdate.getTimezoneOffset() / 60 * 100), 4);
                if (jsdate.getTimezoneOffset() > 0)
                    t = '-' + t;
                else
                    t = '+' + t;
                return t;
            },
            P: function () {
                let O = f.O();
                return (O.substr(0, 3) + ':' + O.substr(3, 2));
            },
            // Full Date/Time
            c: function () {
                return f.Y() + '-' + f.m() + '-' + f.d() + 'T' + f.h() + ':' + f.i() + ':' + f.s() + f.P();
            },
            U: function () {
                return Math.round(jsdate.getTime() / 1000);
            }
        };

        return format.replace(/[\\]?([a-zA-Z])/g, function (t, s) {
            let ret = '';
            if (t !== s) {
                ret = s;
            } else if (f[s]) {
                ret = f[s]();
            } else {
                ret = s;
            }
            return ret;
        });
    };


</script>

 

 

升級自：

https://blog.csdn.net/ywch520/article/details/89645732

 

參考了：

https://www.cnblogs.com/laosunlaiye/p/9395327.html

https://blog.csdn.net/u012967454/article/details/84869372