php基本函数汇总

2020-03-22 18:22:47

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// $result[$v] = isset($result[$v]) $result[$v] : 0; // $result[$v] = $result[$v] + 1; $result[$v] = isset($result[$v]) $result[$v]+1 : 1;print_r($result);//Array[1011] = 2[1003] = 2[1008] = 1[1001] = 1[1000] = 1[1004] = 1[1012] = 1[1009] = 1[1111] = 12. 循环删除目录function cleanup_directory($dir) { foreach (new DirectoryIterator($dir) as $file) { if ($file- isDir()) { if (! $file- isDot()) { cleanup_directory($file- getPathname()); } else { unlink($file- getPathname()); rmdir($dir);3.无限极分类生成树function generateTree($items){ $tree = array(); foreach($items as $item){ if(isset($items[$item['pid']])){ $items[$item['pid']]['son'][] = &$items[$item['id']]; }else{ $tree[] = &$items[$item['id']]; return $tree;function generateTree2($items){ foreach($items as $item) $items[$item['pid']]['son'][$item['id']] = &$items[$item['id']]; return isset($items[0]['son']) $items[0]['son'] : array();$items = array( 1 = array('id' = 1, 'pid' = 0, 'name' = '安徽省'), 2 = array('id' = 2, 'pid' = 0, 'name' = '浙江省'), 3 = array('id' = 3, 'pid' = 1, 'name' = '合肥市'), 4 = array('id' = 4, 'pid' = 3, 'name' = '长丰县'), 5 = array('id' = 5, 'pid' = 1, 'name' = '安庆市'),print_r(generateTree($items)); * 如何取数据格式化的树形数据$tree = generateTree($items);function getTreeData($tree){ foreach($tree as $t){ echo $t['name'].' br if(isset($t['son'])){ getTreeData($t['son']);4.数组排序 a - b 是数字数组写法遇到字符串的时候就要var test = ['ab', 'ac', 'bd', 'bc'];test.sort(function(a, b) { if(a b) { return -1; if(a b) { return 1; return 0;5.array_reduce$raw = [1,2,3,4,5,];// array_reduce 的第三个参数是 $result 的初始值array_reduce($raw, function($result, $html' target='_blank'>value) { $result[$value] = $value; return $result;}, []);// [1 = 1, 2 = 2, ... 5 = 5]6.array_map 闭包中只接受一个或者多个参数，闭包的参数数量和 array_map 本身的参数数量必须一致$input = ['key' = 'value'];array_map(function($key, $value) { echo $key . $value;}, array_keys($input), $input)// 'keyvalue'$double = function($item) { return 2 * $item;$result = array_map($double, [1,2,3]);// 2 4 67.繁殖兔子$month = 12; $fab = array(); $fab[0] = 1; $fab[1] = 1; for ($i = 2; $i $month; $i++) $fab[$i] = $fab[$i - 1] + $fab[$i - 2]; for ($i = 0; $i $month; $i++) echo sprintf("第{%d}个月兔子为：{%d}",$i, $fab[$i])." br/ 8 .datetimefunction getCurMonthFirstDay($date) return date('Y-m-01', strtotime($date)); getCurMonthLastDay('2015-07-23')function getCurMonthLastDay($date) return date('Y-m-d', strtotime(date('Y-m-01', strtotime($date)) . ' +1 month -1 day'));9.加密解密function encrypt($data, $key) $key = md5($key); $x = 0; $len = strlen($data); $l = strlen($key); $char = ''; for ($i = 0; $i $len; $i++) if ($x == $l) $x = 0; $char .= $key{$x}; $x++; $str = ''; for ($i = 0; $i $len; $i++) $str .= chr(ord($data{$i}) + (ord($char{$i})) % 256); return base64_encode($str);function decrypt($data, $key) $key = md5($key); $x = 0; $data = base64_decode($data); $len = strlen($data); $l = strlen($key); $char = ''; for ($i = 0; $i $len; $i++) if ($x == $l) $x = 0; $char .= substr($key, $x, 1); $x++; $str = ''; for ($i = 0; $i $len; $i++) if (ord(substr($data, $i, 1)) ord(substr($char, $i, 1))) $str .= chr((ord(substr($data, $i, 1)) + 256) - ord(substr($char, $i, 1))); else $str .= chr(ord(substr($data, $i, 1)) - ord(substr($char, $i, 1))); return $str;10 . 多维数组降级function array_flatten($arr) { $result = []; array_walk_recursive($arr, function($value) use (&$result) { $result[] = $value; return $result;print_r(array_flatten([1,[2,3],[4,5]]));// [1,[2,3],[4,5]] = [1,2,3,4,5]// var new_array = old_array.concat(value1[, value2[, ...[, valueN]]])var test = [1,2,3,[4,5,6],[7,8]];[].concat.apply([], test); // [1,2,3,4,5,6,7,8] 对于 test 数组中的每一个 value，将它 concat 到空数组 [] 中去，而因为 concat 是 Array 的 prototype，所以我们用一个空 array 作载体var test1 = [1,2,[3,[4,[5]]]];function flatten(arr) { return arr.reduce(function(pre, cur) { if(Array.isArray(cur)) { return flatten(pre.concat(cur)); return pre.concat(cur); }, []);// [1,2,3,4,5]json_encode中文function json_encode_wrapper ($result) if(defined('JSON_UNESCAPED_UNICODE')){ return json_encode($result,JSON_UNESCAPED_UNICODE|JSON_NUMERIC_CHECK); }else { return preg_replace( array("#///u([0-9a-f][0-9a-f][0-9a-f][0-9a-f])#ie", "//"(/d+)/"/",), array("iconv('UCS-2', 'UTF-8', pack('H4', '//1'))", "//1"), json_encode($result)12.二维数组去重$arr = array( array('id'= '2','title'= '...','ding'= '1','jing'= '1','time'= '...','url'= '...','dj'= '...'), array('id'= '2','title'= '...','ding'= '1','jing'= '1','time'= '...','url'= '...','dj'= '...')function about_unique($arr=array()){ /*将该种二维数组看成一维数组，则该一维数组的value值有相同的则干掉只留一个，并将该一维数组用重排后的索引数组返回，而返回的一维数组中的每个元素都是原始key值形成的关联数组 */ $keys =array(); $temp = array(); foreach($arr[0] as $k= $arrays) { /*数组记录下关联数组的key值*/ $keys[] = $k; //return $keys; /*降维*/ foreach($arr as $k= $v) { $v = join(",",$v); //降维 $temp[] = $v; $temp = array_unique($temp); //去掉重复的内容 foreach ($temp as $k = $v){ /*再将拆开的数组按索引数组重新组装*/ $temp[$k] = explode(",",$v); //return $temp; /*再将拆开的数组按关联数组key值重新组装*/ foreach($temp as $k= $v) { foreach($v as $kkk= $ck) { $data[$k][$keys[$kkk]] = $temp[$k][$kkk]; return $data;13.格式化字节大小* 格式化字节大小* @param number $size 字节数* @param string $delimiter 数字和单位分隔符* @return string 格式化后的带单位的大小* @author function format_bytes($size, $delimiter = '') { $units = array('B', 'KB', 'MB', 'GB', 'TB', 'PB'); for ($i = 0; $size = 1024 && $i $i++) $size /= 1024; return round($size, 2) . $delimiter . $units[$i];14.3分钟前* 将指定时间戳转换为截止当前的xx时间前的格式例如 return '3分钟前''* @param string|int $timestamp unix时间戳* @return stringfunction time_ago($timestamp) { $etime = time() - $timestamp; if ($etime 1) return '刚刚'; $interval = array ( 12 * 30 * 24 * 60 * 60 = '年前 ('.date('Y-m-d', $timestamp).')', 30 * 24 * 60 * 60 = '个月前 ('.date('m-d', $timestamp).')', 7 * 24 * 60 * 60 = '周前 ('.date('m-d', $timestamp).')', 24 * 60 * 60 = '天前', 60 * 60 = '小时前', 60 = '分钟前', 1 = '秒前' foreach ($interval as $secs = $str) { $d = $etime / $secs; if ($d = 1) { $r = round($d); return $r . $str;15.身份证号* 判断参数字符串是否为天朝身份证号* @param $id 需要被判断的字符串或数字* @return mixed false 或 array[有内容的array boolean为真]function is_citizen_id($id) { //长度效验 18位身份证中的X为大写 $id = strtoupper($id); if(!(preg_match('/^/d{17}(/d|X)$/',$id) || preg_match('/^/d{15}$/',$id))) { return false; //15位老号码转换为18位并转换成字符串 $Wi = array(7, 9, 10, 5, 8, 4, 2, 1, 6, 3, 7, 9, 10, 5, 8, 4, 2, 1); $Ai = array('1', '0', 'X', '9', '8', '7', '6', '5', '4', '3', '2'); $cardNoSum = 0; if(strlen($id)==16) { $id = substr(0, 6).'19'.substr(6, 9); for($i = 0; $i $i++) { $cardNoSum += substr($id,$i,1) * $Wi[$i]; $seq = $cardNoSum % 11; $id = $id.$Ai[$seq]; //效验18位身份证最后一位字符的合法性 $cardNoSum = 0; $id17 = substr($id,0,17); $lastString = substr($id,17,1); for($i = 0; $i $i++) { $cardNoSum += substr($id,$i,1) * $Wi[$i]; $seq = $cardNoSum % 11; $realString = $Ai[$seq]; if($lastString!=$realString) {return false;} //地域效验 $oCity = array(11= "北京",12= "天津",13= "河北",14= "山西",15= "内蒙古",21= "辽宁",22= "吉林",23= "黑龙江",31= "上海",32= "江苏",33= "浙江",34= "安徽",35= "福建",36= "江西",37= "山东",41= "河南",42= "湖北",43= "湖南",44= "广东",45= "广西",46= "海南",50= "重庆",51= "四川",52= "贵州",53= "云南",54= "西藏",61= "陕西",62= "甘肃",63= "青海",64= "宁夏",65= "新疆",71= "台湾",81= "香港",82= "澳门",91= "国外"); $City = substr($id, 0, 2); $BirthYear = substr($id, 6, 4); $BirthMonth = substr($id, 10, 2); $BirthDay = substr($id, 12, 2); $Sex = substr($id, 16,1) % 2 ;//男1 女0 //$Sexcn = $Sex '男':'女'; //地域验证 if(is_null($oCity[$City])) {return false;} //出生日期效验 if($BirthYear 2078 || $BirthYear 1900) {return false;} $RealDate = strtotime($BirthYear.'-'.$BirthMonth.'-'.$BirthDay); if(date('Y',$RealDate)!=$BirthYear || date('m',$RealDate)!=$BirthMonth || date('d',$RealDate)!=$BirthDay) { return false; return array('id'= $id,'location'= $oCity[$City],'Y'= $BirthYear,'m'= $BirthMonth,'d'= $BirthDay,'sex'= $Sex);16.获取二维数组中某个key的集合$user = array( 0 = array( 'id' = 1, 'name' = '张三', 'email' = 'zhangsan@sina.com', ), 1 = array( 'id' = 2, 'name' = '李四', 'email' = 'lisi@163.com', ), 2 = array( 'id' = 5, 'name' = '王五', 'email' = '10000@qq.com', ), ...... );$ids = array(); $ids = array_map('array_shift', $user);$ids = array_column($user, 'id');//php5.5$names = array(); $names = array_reduce($user, create_function('$v,$w', '$v[$w["id"]]=$w["name"];return $v;'));以上所述就是本文的全部内容了，希望大家能够喜欢。PHP教程

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