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date [-d @int|str] [+%s|"+%F %T"]
netstat -ltunp
sar -n DEV 1

php 农历与公历互转

https://www.73so.com/art/241.html

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class Lunar {
	var $MIN_YEAR = 1891;
	var $MAX_YEAR = 2100;
	var $lunarInfo = array(
		array(0,2,9,21936),array(6,1,30,9656),array(0,2,17,9584),array(0,2,6,21168),array(5,1,26,43344),array(0,2,13,59728),
		array(0,2,2,27296),array(3,1,22,44368),array(0,2,10,43856),array(8,1,30,19304),array(0,2,19,19168),array(0,2,8,42352),
		array(5,1,29,21096),array(0,2,16,53856),array(0,2,4,55632),array(4,1,25,27304),array(0,2,13,22176),array(0,2,2,39632),
		array(2,1,22,19176),array(0,2,10,19168),array(6,1,30,42200),array(0,2,18,42192),array(0,2,6,53840),array(5,1,26,54568),
		array(0,2,14,46400),array(0,2,3,54944),array(2,1,23,38608),array(0,2,11,38320),array(7,2,1,18872),array(0,2,20,18800),
		array(0,2,8,42160),array(5,1,28,45656),array(0,2,16,27216),array(0,2,5,27968),array(4,1,24,44456),array(0,2,13,11104),
		array(0,2,2,38256),array(2,1,23,18808),array(0,2,10,18800),array(6,1,30,25776),array(0,2,17,54432),array(0,2,6,59984),
		array(5,1,26,27976),array(0,2,14,23248),array(0,2,4,11104),array(3,1,24,37744),array(0,2,11,37600),array(7,1,31,51560),
		array(0,2,19,51536),array(0,2,8,54432),array(6,1,27,55888),array(0,2,15,46416),array(0,2,5,22176),array(4,1,25,43736),
		array(0,2,13,9680),array(0,2,2,37584),array(2,1,22,51544),array(0,2,10,43344),array(7,1,29,46248),array(0,2,17,27808),
		array(0,2,6,46416),array(5,1,27,21928),array(0,2,14,19872),array(0,2,3,42416),array(3,1,24,21176),array(0,2,12,21168),
		array(8,1,31,43344),array(0,2,18,59728),array(0,2,8,27296),array(6,1,28,44368),array(0,2,15,43856),array(0,2,5,19296),
		array(4,1,25,42352),array(0,2,13,42352),array(0,2,2,21088),array(3,1,21,59696),array(0,2,9,55632),array(7,1,30,23208),
		array(0,2,17,22176),array(0,2,6,38608),array(5,1,27,19176),array(0,2,15,19152),array(0,2,3,42192),array(4,1,23,53864),
		array(0,2,11,53840),array(8,1,31,54568),array(0,2,18,46400),array(0,2,7,46752),array(6,1,28,38608),array(0,2,16,38320),
		array(0,2,5,18864),array(4,1,25,42168),array(0,2,13,42160),array(10,2,2,45656),array(0,2,20,27216),array(0,2,9,27968),
		array(6,1,29,44448),array(0,2,17,43872),array(0,2,6,38256),array(5,1,27,18808),array(0,2,15,18800),array(0,2,4,25776),
		array(3,1,23,27216),array(0,2,10,59984),array(8,1,31,27432),array(0,2,19,23232),array(0,2,7,43872),array(5,1,28,37736),
		array(0,2,16,37600),array(0,2,5,51552),array(4,1,24,54440),array(0,2,12,54432),array(0,2,1,55888),array(2,1,22,23208),
		array(0,2,9,22176),array(7,1,29,43736),array(0,2,18,9680),array(0,2,7,37584),array(5,1,26,51544),array(0,2,14,43344),
		array(0,2,3,46240),array(4,1,23,46416),array(0,2,10,44368),array(9,1,31,21928),array(0,2,19,19360),array(0,2,8,42416),
		array(6,1,28,21176),array(0,2,16,21168),array(0,2,5,43312),array(4,1,25,29864),array(0,2,12,27296),array(0,2,1,44368),
		array(2,1,22,19880),array(0,2,10,19296),array(6,1,29,42352),array(0,2,17,42208),array(0,2,6,53856),array(5,1,26,59696),
		array(0,2,13,54576),array(0,2,3,23200),array(3,1,23,27472),array(0,2,11,38608),array(11,1,31,19176),array(0,2,19,19152),
		array(0,2,8,42192),array(6,1,28,53848),array(0,2,15,53840),array(0,2,4,54560),array(5,1,24,55968),array(0,2,12,46496),
		array(0,2,1,22224),array(2,1,22,19160),array(0,2,10,18864),array(7,1,30,42168),array(0,2,17,42160),array(0,2,6,43600),
		array(5,1,26,46376),array(0,2,14,27936),array(0,2,2,44448),array(3,1,23,21936),array(0,2,11,37744),array(8,2,1,18808),
		array(0,2,19,18800),array(0,2,8,25776),array(6,1,28,27216),array(0,2,15,59984),array(0,2,4,27424),array(4,1,24,43872),
		array(0,2,12,43744),array(0,2,2,37600),array(3,1,21,51568),array(0,2,9,51552),array(7,1,29,54440),array(0,2,17,54432),
		array(0,2,5,55888),array(5,1,26,23208),array(0,2,14,22176),array(0,2,3,42704),array(4,1,23,21224),array(0,2,11,21200),
		array(8,1,31,43352),array(0,2,19,43344),array(0,2,7,46240),array(6,1,27,46416),array(0,2,15,44368),array(0,2,5,21920),
		array(4,1,24,42448),array(0,2,12,42416),array(0,2,2,21168),array(3,1,22,43320),array(0,2,9,26928),array(7,1,29,29336),
		array(0,2,17,27296),array(0,2,6,44368),array(5,1,26,19880),array(0,2,14,19296),array(0,2,3,42352),array(4,1,24,21104),
		array(0,2,10,53856),array(8,1,30,59696),array(0,2,18,54560),array(0,2,7,55968),array(6,1,27,27472),array(0,2,15,22224),
		array(0,2,5,19168),array(4,1,25,42216),array(0,2,12,42192),array(0,2,1,53584),array(2,1,21,55592),array(0,2,9,54560)
	);

	/**
	 * 将阳历转换为阴历
	* @param year 公历-年
	* @param month 公历-月
	* @param date 公历-日
	*/
	function convertSolarToLunar($year, $month, $date)
	{
		//debugger;
		$yearData = $this->lunarInfo[$year - $this->MIN_YEAR];
		if ($year == $this->MIN_YEAR && $month <= 2 && $date <= 9)
			return array(1891, '正月', '初一', '辛卯', 1, 1, '兔');
		return $this->getLunarByBetween($year, $this->getDaysBetweenSolar($year, $month, $date, $yearData[1], $yearData[2]));
	}

	function convertSolarMonthToLunar($year, $month)
	{
		$yearData = $this->lunarInfo[$year - $this->MIN_YEAR];
		if ($year == $this->MIN_YEAR && $month <=2 && $date <= 9)
			return array(1891, '正月', '初一', '辛卯', 1, 1, '兔');
		$month_days_ary = array(31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31);
		$dd = $month_days_ary[$month - 1];
		if ($this->isLeapYear($year) && $month == 2)
			$dd ++;
		$lunar_ary = array();
		for ($i = 1; $i <= $dd; $i ++) {
			$array = $this->getLunarByBetween($year,$this->getDaysBetweenSolar($year, $month, $i, $yearData[1], $yearData[2]));
			$array[] = $year . '-' . $month . '-' . $i;
			$lunar_ary[$i] = $array;
		}
		return $lunar_ary;
	}

	/**
	 * 将阴历转换为阳历
	* @param year 阴历-年
	* @param month 阴历-月,闰月处理:例如如果当年闰五月,那么第二个五月就传六月,相当于阴历有13个月,只是有的时候第13个月的天数为0
	* @param date 阴历-日
	*/
	function convertLunarToSolar($year, $month, $date)
	{
		$yearData = $this->lunarInfo[$year - $this->MIN_YEAR];
		$between = $this->getDaysBetweenLunar($year, $month, $date);
		$res = mktime(0, 0, 0, $yearData[1], $yearData[2], $year);
		$res = date('Y-m-d', $res + $between * 24 * 60 * 60);
		$day = explode('-', $res);
		$year = $day[0];
		$month = $day[1];
		$day = $day[2];
		return array($year, $month, $day);
	}

	/**
	 * 判断是否是闰年
	* @param year
	*/
	function isLeapYear($year)
	{
		return (($year%4 == 0 && $year%100 != 0) || ($year%400 == 0));
	}

	/**
	 * 获取干支纪年
	* @param year
	*/
	function getLunarYearName($year)
	{
		$sky = array('庚','辛','壬','癸','甲','乙','丙','丁','戊','己');
		$earth = array('申','酉','戌','亥','子','丑','寅','卯','辰','巳','午','未');
		$year = $year.'';
		return $sky[$year[3]] . $earth[$year % 12];
	}

	/**
	 * 根据阴历年获取生肖
	* @param year 阴历年
	*/
	function getYearZodiac($year)
	{
		$zodiac = array('猴','鸡','狗','猪','鼠','牛','虎','兔','龙','蛇','马','羊');
		return $zodiac[$year % 12];
	}

	/**
	 * 获取阳历月份的天数
	* @param year 阳历-年
	* @param month 阳历-月
	*/
	function getSolarMonthDays($year, $month)
	{
		$monthHash = array('1'=>31,'2'=>$this->isLeapYear($year)?29:28,'3'=>31,'4'=>30,'5'=>31,'6'=>30,'7'=>31,'8'=>31,'9'=>30,'10'=>31,'11'=>30,'12'=>31);
		return $monthHash["[$month]"];
	}

	/**
	 * 获取阴历月份的天数
	* @param year 阴历-年
	* @param month 阴历-月,从一月开始
	*/
	function getLunarMonthDays($year, $month)
	{
		$monthData = $this->getLunarMonths($year);
		return $monthData[$month - 1];
	}

	/**
	 * 获取阴历每月的天数的数组
	* @param year
	*/
	function getLunarMonths($year)
	{
		$yearData = $this->lunarInfo[$year - $this->MIN_YEAR];
		$leapMonth = $yearData[0];
		$bit = decbin($yearData[3]);
		for ($i = 0; $i < strlen($bit);$i ++)
			$bitArray[$i] = substr($bit, $i, 1);
		for ($k = 0,$klen = 16 - count($bitArray); $k < $klen; $k ++)
			array_unshift($bitArray, '0');
		$bitArray = array_slice($bitArray, 0, ($leapMonth == 0 ? 12 : 13));
		for ($i = 0; $i < count($bitArray); $i ++)
			$bitArray[$i] = $bitArray[$i] + 29;
		return $bitArray;
	}

	/**
	 * 获取农历每年的天数
	* @param year 农历年份
	*/
	function getLunarYearDays($year)
	{
		$yearData = $this->lunarInfo[$year - $this->MIN_YEAR];
		$monthArray = $this->getLunarYearMonths($year);
		$len = count($monthArray);
		return ($monthArray[$len-1] == 0 ? $monthArray[$len-2] : $monthArray[$len-1]);
	}

	function getLunarYearMonths($year)
	{
		//debugger;
		$monthData = $this->getLunarMonths($year);
		$res = array();
		$temp = 0;
		$yearData = $this->lunarInfo[$year - $this->MIN_YEAR];
		$len = ($yearData[0] == 0 ? 12 : 13);
		for ($i = 0; $i < $len; $i ++) {
			$temp = 0;
			for ($j = 0; $j <= $i; $j ++)
				$temp += $monthData[$j];
			array_push($res, $temp);
		}
		return $res;
	}

	/**
	 * 获取闰月
	* @param year 阴历年份
	*/
	function getLeapMonth($year)
	{
		$yearData = $this->lunarInfo[$year - $this->MIN_YEAR];
		return $yearData[0];
	}

	/**
	 * 计算阴历日期与正月初一相隔的天数
	* @param year
	* @param month
	* @param date
	*/
	function getDaysBetweenLunar($year, $month, $date)
	{
		$yearMonth = $this->getLunarMonths($year);
		$res = 0;
		for ($i = 1; $i < $month; $i ++)
			$res += $yearMonth[$i - 1];
		$res += $date - 1;
		return $res;
	}

	/**
	 * 计算2个阳历日期之间的天数
	* @param year 阳历年
	* @param cmonth
	* @param cdate
	* @param dmonth 阴历正月对应的阳历月份
	* @param ddate 阴历初一对应的阳历天数
	*/
	function getDaysBetweenSolar($year, $cmonth, $cdate, $dmonth, $ddate)
	{
		$a = mktime(0, 0, 0, $cmonth, $cdate, $year);
		$b = mktime(0, 0, 0, $dmonth, $ddate, $year);
		return ceil(($a - $b) / 24 / 3600);
	}

	/**
	 * 根据距离正月初一的天数计算阴历日期
	* @param year 阳历年
	* @param between 天数
	*/
	function getLunarByBetween($year, $between)
	{
		//debugger;
		$lunarArray = array();
		$yearMonth = array();
		$t = 0;
		$e = 0;
		$leapMonth = 0;
		$m = '';
		if ($between == 0) {
			array_push($lunarArray, $year,'正月','初一');
			$t = 1;
			$e = 1;
		} else {
			$year = $between > 0 ? $year : ($year - 1);
			$yearMonth = $this->getLunarYearMonths($year);
			$leapMonth = $this->getLeapMonth($year);
			$between = $between > 0 ? $between : ($this->getLunarYearDays($year) + $between);
			for ($i = 0; $i < 13; $i ++) {
				if ($between == $yearMonth[$i]) {
					$t = $i + 2;
					$e = 1;
					break;
				} elseif ($between < $yearMonth[$i]) {
					$t = $i + 1;
					$e = $between - (empty($yearMonth[$i-1]) ? 0 : $yearMonth[$i-1]) + 1;
					break;
				}
			}
			$m = ($leapMonth != 0 && $t == $leapMonth + 1) ? ('闰' . $this->getCapitalNum($t - 1, true)) : $this->getCapitalNum(($leapMonth != 0 && $leapMonth + 1 < $t ? ($t-1) : $t), true);
			array_push($lunarArray, $year, $m, $this->getCapitalNum($e, false));
		}
		array_push($lunarArray, $this->getLunarYearName($year));// 天干地支
		array_push($lunarArray, $t, $e);
		array_push($lunarArray, $this->getYearZodiac($year));// 12生肖
		array_push($lunarArray, $leapMonth);// 闰几月
		return $lunarArray;
	}

	/**
	 * 获取数字的阴历叫法
	* @param num 数字
	* @param isMonth 是否是月份的数字
	*/
	function getCapitalNum($num, $isMonth)
	{
		$isMonth = $isMonth || false;
		$dateHash = array('0'=>'','1'=>'一','2'=>'二','3'=>'三','4'=>'四','5'=>'五','6'=>'六','7'=>'七','8'=>'八','9'=>'九','10'=>'十 ');
		$monthHash = array('0'=>'','1'=>'正月','2'=>'二月','3'=>'三月','4'=>'四月','5'=>'五月','6'=>'六月','7'=>'七月','8'=>'八月','9'=>'九月','10'=>'十月','11'=>'十一月','12'=>'十二月');
		$res = '';
		if ($isMonth)
			$res = $monthHash[$num];
		else {
			if ($num <= 10)
				$res = '初' . $dateHash[$num];
			elseif ($num > 10 && $num < 20)
				$res = '十' . $dateHash[$num - 10];
			elseif ($num == 20)
				$res = "二十";
			elseif ($num > 20 && $num < 30)
				$res = "廿" . $dateHash[$num - 20];
			elseif ($num == 30)
				$res = "三十";
		}
		return $res;
	}

	/*
	* 节气通用算法
	*/
	function getJieQi($_year, $month, $day)
	{
		$year = substr($_year, -2) + 0;
		$coefficient = array(
			array(5.4055,2019,-1),//小寒
			array(20.12,2082,1),//大寒
			array(3.87),//立春
			array(18.74,2026,-1),//雨水
			array(5.63),//惊蛰
			array(20.646,2084,1),//春分
			array(4.81),//清明
			array(20.1),//谷雨
			array(5.52,1911,1),//立夏
			array(21.04,2008,1),//小满
			array(5.678,1902,1),//芒种
			array(21.37,1928,1),//夏至
			array(7.108,2016,1),//小暑
			array(22.83,1922,1),//大暑
			array(7.5,2002,1),//立秋
			array(23.13),//处暑
			array(7.646,1927,1),//白露
			array(23.042,1942,1),//秋分
			array(8.318),//寒露
			array(23.438,2089,1),//霜降
			array(7.438,2089,1),//立冬
			array(22.36,1978,1),//小雪
			array(7.18,1954,1),//大雪
			array(21.94,2021,-1)//冬至
		);
		$term_name = array(
			"小寒","大寒","立春","雨水","惊蛰","春分","清明","谷雨",
			"立夏","小满","芒种","夏至","小暑","大暑","立秋","处暑",
			"白露","秋分","寒露","霜降","立冬","小雪","大雪","冬至"
		);
		$idx1 = ($month-1) * 2;
		$_leap_value = floor(($year-1) / 4);
		$day1 = floor($year * 0.2422 + $coefficient[$idx1][0]) - $_leap_value;
		if (isset($coefficient[$idx1][1]) && $coefficient[$idx1][1] == $_year)
			$day1 += $coefficient[$idx1][2];
		$day2 = floor($year * 0.2422 + $coefficient[$idx1+1][0]) - $_leap_value;
		if (isset($coefficient[$idx1+1][1]) && $coefficient[$idx1+1][1] == $_year)
			$day1 += $coefficient[$idx1+1][2];
	//    var_dump($month);var_dump($idx1); var_dump($day); var_dump($day1); die();
		$data = array();
		if ($day < $day1) {
	//        $data['name1'] = $term_name[$idx1 - 1];
	//        $data['name2'] = $term_name[$idx1 - 1] . '后';
		} elseif ($day == $day1) {
			$data['name1'] = $term_name[$idx1];
			$data['name2'] = $term_name[$idx1];
		} elseif ($day > $day1 && $day < $day2) {
	//        $data['name1'] = $term_name[$idx1];
	//        $data['name2'] = $term_name[$idx1] . '后';
		} elseif ($day == $day2) {
			$data['name1'] = $term_name[$idx1 + 1];
			$data['name2'] = $term_name[$idx1 + 1];
		} elseif ($day > $day2) {
	//        $data['name1'] = $term_name[$idx1 + 1];
	//        $data['name2'] = $term_name[$idx1 + 1] . '后';
		}
	//    return $data;
		if (isset($data['name1']))
			return $data['name1'];
		return '';
	}

	/*
	* 获取节日:特殊的节日只能修改此函数来计算
	*/
	function getFestival($today, $nl_info = false, $config = 1)
	{
		if ($config == 1) {
			$arr_lunar = array('01-01'=>'春节','01-15'=>'元宵节','02-02'=>'二月二','05-05'=>'端午节','07-07'=>'七夕节','08-15'=>'中秋节','09-09'=>'重阳节','12-08'=>'腊八节','12-23'=>'小年');
			$arr_solar = array('01-01'=>'元旦','02-14'=>'情人节','03-12'=>'植树节','04-01'=>'愚人节','05-01'=>'劳动节','06-01'=>'儿童节','10-01'=>'国庆节','10-31'=>'万圣节','12-24'=>'平安夜','12-25'=>'圣诞节');
		}
		//需要不同节日的,用不同的$config,然后配置$arr_lunar和$arr_solar
		$festivals = array();
		list($y, $m, $d) = explode('-', $today);
		if (!$nl_info)
			$nl_info = $this->convertSolarToLunar($y, intval($m), intval($d));
		if ($nl_info[7] > 0 && $nl_info[7] < $nl_info[4])
			$nl_info[4] -= 1;
		$md_lunar = substr('0' . $nl_info[4], -2) . '-' . substr('0' . $nl_info[5], -2);
		$md_solar = substr_replace($today, '', 0, 5);
		isset($arr_lunar[$md_lunar]) ? array_push($festivals, $arr_lunar[$md_lunar]) : '';
		isset($arr_solar[$md_solar]) ? array_push($festivals, $arr_solar[$md_solar]) : '';
		$glweek = date("w", strtotime($today));
		if ($m == 5 && ($d > 7) && ($d < 15) && ($glweek == 0))
			array_push($festivals, "母亲节");
		if ($m == 6 && ($d > 14) && ($d < 22) && ($glweek == 0))
			array_push($festivals, "父亲节");
		$jieqi = $this->getJieQi($y, $m, $d);
		if ($jieqi)
			array_push($festivals, $jieqi);
		return $festivals;
	}

	/*
	* 获取当前时间属于哪个时辰
	@param int $time 时间戳
	*/
	function getTheHour($h)
	{
		$d = $h;
		if ($d == 23 || $d == 0) {
			return '子时';
		} elseif ($d == 1 || $d == 2) {
			return '丑时';
		} elseif ($d == 3 || $d == 4) {
			return '寅时';
		} elseif ($d == 5 || $d == 6) {
			return '卯时';
		} elseif ($d == 7 || $d == 8) {
			return '辰时';
		} elseif ($d == 9 || $d == 10) {
			return '巳时';
		} elseif ($d == 11 || $d == 12) {
			return '午时';
		} elseif ($d == 13 || $d == 14) {
			return '未时';
		} elseif ($d == 15 || $d == 16) {
			return '申时';
		} elseif ($d == 17 || $d == 18) {
			return '酉时';
		} elseif ($d == 19 || $d == 20) {
			return '戌时';
		} elseif ($d == 21 || $d == 22) {
			return '亥时';
		}
	}
}

https://blog.csdn.net/qq_39863107/article/details/105387879

PHP GZ压缩与解压

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/*将字符串添加至GZ文件*/
function gz_str($str,$gz_name) {
	$fp = gzopen($gz_name, 'w9');
	gzwrite ($fp, $str);
	gzclose($fp); 
}

/*将文件添加至GZ文件*/
function gz_file($file,$gz_name) {
	$fp = gzopen($gz_name, 'w9');
	gzwrite($fp, file_get_contents($file));
	gzclose($fp); 
}

/*读取GZ文件*/
function read_gz($gz_file) {
	$buffer_size = 4096; // read 4kb at a time
	$file = gzopen($gz_file, 'rb');
	$str='';
	while (!gzeof($file)) {
		$str .= gzread($file, $buffer_size);
	}
	gzclose($file);
	return $str;
}
/*解压GZ文件*/
function unzip_gz($gz_file) {
	$buffer_size = 4096; // read 4kb at a time
	$out_file_name = str_replace('.gz', '', $gz_file);
	$file = gzopen($gz_file, 'rb');
	$out_file = fopen($out_file_name, 'wb');
	$str = '';
	while (!gzeof($file)) {
		fwrite($out_file, gzread($file, $buffer_size));
	}
	fclose($out_file);
	gzclose($file);
}

PHP 实现文件夹遍历

https://m.php.cn/faq/552354.html

opendir() 函数

opendir() 函数是 PHP 用于打开文件夹的函数,在调用该函数时需要传入文件夹路径作为参数。在文件夹打开成功后,可以通过 readdir() 函数读取文件夹中的内容。

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$dir = './test';  //文件夹路径
$handle = opendir($dir);  //打开文件夹
while ($file = readdir($handle)) {  //循环读取所有文件
	if ($file != "." && $file != "..") {  //排除"."和".."两个特殊的文件夹
		echo $file."<br>";  //输出文件名
	}
}
closedir($handle);  //关闭文件夹

在上面的示例代码中,我打开了一个名为 “test” 的文件夹,并循环读取了该文件夹中的所有文件名,并忽略了 “.” 和 “..” 两个特殊的文件夹。

is_dir() 函数和递归遍历

如果要遍历一个目录下的所有子目录和文件,我们可以使用递归方法。在遍历过程中,我们还需要判断当前遍历到的是文件夹还是文件,可以使用 is_dir() 函数来进行判断。

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function scanDir($dir) {
	if (!is_dir($dir)) {
		echo '不是一个有效的文件夹路径';
		return;
	}
	$handle = opendir($dir);  //打开文件夹
	while ($file = readdir($handle)) {  //循环读取所有文件
		if ($file == '.' || $file == '..') {  //忽略掉 ".",".." 特殊文件夹
			continue;
		}
		$path = $dir.'/'.$file;  //当前文件或文件夹的完整路径
		if (is_dir($path)) {  //如果是一个文件夹
			echo '<b>'.$file.'</b><br>';  //输出文件夹名称
			scanDir($path);  //递归遍历子文件夹
		} else {  //如果是一个文件
			echo $file.'<br>';  //输出文件名称
		}
	}
	closedir($handle);  //关闭文件夹
}

在上面的示例代码中,我定义了一个函数 scanDir(),该函数接受一个文件夹路径作为参数。在函数内部,我首先判断传入的路径是否为文件夹。如果不是文件夹,则直接返回。

接下来,我打开文件夹,并循环读取其中的文件和文件夹。当遍历到文件夹时,我会输出文件夹名称,并递归调用 scanDir() 函数遍历子文件夹。当遍历到文件时,我只是输出文件名称。

scandir() 函数

PHP 还提供了一个非常简单的函数 scandir(),可以用于一次性获取一个文件夹下的所有文件和文件夹名称。和 opendir() 函数不同的是,该函数返回的是一个数组,数组中包含了所有子文件夹和文件的名称。

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$dir = './test';  //文件夹路径
$files = scandir($dir);  //获取文件夹下所有文件和文件夹名称
foreach($files as $file){  //循环遍历
	if($file == '.' || $file == '..'){  //忽略掉 ".",".." 特殊文件夹
		continue;
	}
	echo $file.'<br>';  //输出文件或文件夹名称
}

在上面的示例代码中,我调用了 scandir() 函数获取了文件夹下所有文件和文件夹名称,并循环遍历了这个数组。同样地,我忽略了两个特殊的文件夹 “.” 和 “..”,只输出了文件夹和文件的名称。