PHP 日期格式化和日期计算以及当获取前周、月头尾日期
PHP 日期格式化示例代码：
/**
* 格式化时间
* $type:类型
* $strDate：需要处理的时间字符串
*
* 年份 Y：四位年份 y：两位年份
* 月份 m: 两位数字月份 n: 一位数字月份 M：英文月
* 日期 d：两位数字日期 j:一位数字日期 D:英文日期
* 时：H 、分:i 、秒：s
**/
public function GetFormatDate($type = 1,$strDate=''){
$time = time();
if(isset($strDate) && !empty($strDate)){
$time = strtotime($strDate);
}
switch($type){
case 1:
return date("H:i",$time);
case 2:
return date("m月d日 H:i",$time);
case 3:
return date("m/d H:i",$time);
case 4:
return date("Y年m月d日 H:i",$time);
case 5:
return date("Y/m/d H:i",$time);
case 6:
return date("Y年m月d日 H:i:s",$time);
case 7:
return date("Y-m-d H:i:s",$time);
case 8:
return date("Y/m/d H:i:s",$time);
default:
return $strDate;
}
}日期计算示例代码：
/**
* 时间加减处理
* $strDate：需要处理的时间字符串
* $days： 加减天数
**/
public function ChangeDate($strDate,$days){
$time = time();
if(isset($strDate) && !empty($strDate)){
$time = strtotime($strDate);
}
return date('Y-m-d H:i:s',strtotime("$days day",$time));
}
获取当前周、月头尾日期示例代码：
/**
* 获取当前周、月的头尾日期
*
* $dateArr['W1']:周一
* $dateArr['W7']:周末
* $dateArr['M1']:月头
* $dateArr['M2']:月尾
**/
public function GetCurrentDateInfo(){
$dayTimes = 24*60*60;
$dateArr = [];$temp = '';
$weekIndex = (int)date('w');
switch($weekIndex){
case 0:
$dateArr['W1'] = date('Y-m-d 00:00:00',strtotime('+1 day'));
$dateArr['W7'] = date('Y-m-d 23:59:59',strtotime('+7 day'));
break;
case 1:
$dateArr['W1'] = date('Y-m-d 00:00:00');
$dateArr['W7'] = date('Y-m-d 23:59:59',strtotime('+6 day'));
break;
case 2:
$dateArr['W1'] = date('Y-m-d 00:00:00',strtotime('-1 day'));
$dateArr['W7'] = date('Y-m-d 23:59:59',strtotime('+5 day'));
break;
case 3:
$dateArr['W1'] = date('Y-m-d 00:00:00',strtotime('-2 day'));
$dateArr['W7'] = date('Y-m-d 23:59:59',strtotime('+4 day'));
break;
case 4:
$dateArr['W1'] = date('Y-m-d 00:00:00',strtotime('-3 day'));
$dateArr['W7'] = date('Y-m-d 23:59:59',strtotime('+3 day'));
break;
case 5:
$dateArr['W1'] = date('Y-m-d 00:00:00',strtotime('-4 day'));
$dateArr['W7'] = date('Y-m-d 23:59:59',strtotime('+2 day'));
break;
case 6:
$dateArr['W1'] = date('Y-m-d 00:00:00',strtotime('-5 day'));
$dateArr['W7'] = date('Y-m-d 23:59:59',strtotime('+1 day'));
break;
}
//1-12：一月 至 十二月
$monthIndex = (int)date('m');
switch($monthIndex){
case 1:
$temp = date('Y-02-01 00:00:00');
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
case 2:
$temp = date('Y-03-01 00:00:00');
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
case 3:
$temp = date('Y-04-01 00:00:00');
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
case 4:
$temp = date('Y-05-01 00:00:00');
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
case 5:
$temp = date('Y-06-01 00:00:00');
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
case 6:
$temp = date('Y-07-01 00:00:00');
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
case 7:
$temp = date('Y-08-01 00:00:00');
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
case 8:
$temp = date('Y-09-01 00:00:00');
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
case 9:
$temp = date('Y-10-01 00:00:00');
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
case 10:
$temp = date('Y-11-01 00:00:00');
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
case 11:
$temp = date('Y-12-01 00:00:00');
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
case 12:
$temp = date((date('Y')+1)."-01-01 00:00:00");
$dateArr['M1'] = date('Y-m-01 00:00:00');
$dateArr['M2'] = date('Y-m-d 23:59:59',strtotime($temp)-$dayTimes);
break;
}
return $dateArr;
}
以上代码仅供参考，疏漏之处还请指出以便改进！
