函数集

摘要：统计数组元素个数循环删除目录无限极分类生成树安徽省浙江省合肥市长丰县安庆市如何取数据格式化的树形数据数组排序是数字数组写法遇到字符串的时候就要的第三个参数是的初始值闭包中只接受一个或者多个参数，闭包的参数数量和本身的参数数量必须

统计数组元素个数

$arr = array(
      "1011,1003,1008,1001,1000,1004,1012",
      "1009",
      "1011,1003,1111"
    );
$result = array();
foreach ($arr as $str) {
  $str_arr = explode(",", $str);
  foreach ($str_arr as $v) {
    // $result[$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] => 1

)

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"]."
";

        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, $value) {
    $result[$value] = $value;

    return $result;
}, []);
// [1 => 1, 2 => 2, ... 5 => 5]

6.arraymap 闭包中只接受一个或者多个参数，闭包的参数数量和 arraymap 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 6

7.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])."
";
     }

8 .datetime

function 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]

11.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 < 6; $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 $timestamp unix时间戳
* @return string
*/
function time_ago($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 < 17; $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 < 17; $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;"));

17.判断一个数是否为素数

function isPrime(number) {

   // If your browser doesn"t support the method Number.isInteger of ECMAScript 6,
   // you can implement your own pretty easily
   if (typeof number !== "number" || !Number.isInteger(number)) {
      // Alternatively you can throw an error.
      return false;
   }
 
   if (number < 2) {
      return false;
   }
    
   if (number === 2) {
      return true;
   } else if (number % 2 === 0) {
      return false;
   }
 
   var squareRoot = Math.sqrt(number);
   for(var i = 3; i <= squareRoot; i += 2) {
      if (number % i === 0) {
         return false;
      }
   }
 
   return true;
}
function isPrime($n) {//TurkHackTeam AVP production
    if ($n <= 3) {
        return $n > 1;
    } else if ($n % 2 === 0 || $n % 3 === 0) {
        return false;
    } else {
        for ($i = 5; $i * $i <= $n; $i += 6) {
            if ($n % $i === 0 || $n % ($i + 2) === 0) {
                return false;
            }
        }
        return true;
    }
}

18.闭包

var nodes = document.getElementsByTagName("button");
for (var i = 0; i < nodes.length; i++) {
   nodes[i].addEventListener("click", (function(i) {
      return function() {
         console.log("You clicked element #" + i);
      }
   })(i));
}
//将函数移动到循环外部即可（创建了一个新的闭包对象）
function handlerWrapper(i) {
   return function() {
      console.log("You clicked element #" + i);
   }
}
 
var nodes = document.getElementsByTagName("button");
for (var i = 0; i < nodes.length; i++) {
   nodes[i].addEventListener("click", handlerWrapper(i));
}

19.事件循环 Event Loop

function printing() {
   console.log(1); 
   setTimeout(function() { console.log(2); }, 1000); 
   setTimeout(function() { console.log(3); }, 0); 
   console.log(4);
}
 //即使setTimeout的延迟为0，其回调也会被加入到那些没有延迟的函数队列之后。
printing();//1432

20.字典排序

def mysort():
    dic = {"a":31, "bc":5, "c":3, "asd":4, "aa":74, "d":0}
    dict= sorted(dic.iteritems(), key=lambda d:d[1], reverse = True)
    print dict//[("aa", 74), ("a", 31), ("bc", 5), ("asd", 4), ("c", 3), ("d", 0)]

21.数值缩写

var abbr = function (number) {
    var abbrList = ["", "K", "M", "G", "T", "P", "E", "Z", "Y"];
    var step = 1000;
    var i = 0;
    var j = abbrList.length;

    while (number >= step && ++i < j) {
        number = number / step;
    }

    if (i === j) {
        i = j - 1;
    }
    

    return number + abbrList[i];
};

22.数字千位分隔符

var format = function (number) {
    return String(number).replace(/(d)(?=(d{3})+$)/g, "$1,");
};

23.实现随机颜色值

var randomColor = function () {
    var letters = "0123456789ABCDEF";
    var ret = "#";

    for (var i = 0; i < 6; i++) {
        ret += letters[Math.round(Math.random() * 15)];
    }

    return ret;
};
var randomColor = function () {
    return "#" + Math.random().toString(16).substr(2, 6);
};

24.时间格式化输出

//formatDate(new Date(1409894060000), "yyyy-MM-dd HH:mm:ss 星期w") 2014-09-05 13:14:20 星期五
function formatDate(oDate, sFormation) {
    var obj = {
        yyyy:oDate.getFullYear(),
        yy:(""+ oDate.getFullYear()).slice(-2),//非常精辟的方法
        M:oDate.getMonth()+1,
        MM:("0"+ (oDate.getMonth()+1)).slice(-2),
        d:oDate.getDate(),
        dd:("0" + oDate.getDate()).slice(-2),
        H:oDate.getHours(),
        HH:("0" + oDate.getHours()).slice(-2),
        h:oDate.getHours() % 12,
        hh:("0"+oDate.getHours() % 12).slice(-2),
        m:oDate.getMinutes(),
        mm:("0" + oDate.getMinutes()).slice(-2),
        s:oDate.getSeconds(),
        ss:("0" + oDate.getSeconds()).slice(-2),
        w:["日", "一", "二", "三", "四", "五", "六"][oDate.getDay()]
    };
    return sFormation.replace(/([a-z]+)/ig,function($1){return obj[$1]});
}

25.斐波那契数列

function fibonacci(n) {
    if(n ==1 || n == 2){
        return 1
    }
    return fibonacci(n - 1) + fibonacci(n - 2);
}

26.数组去重

Array.prototype.distinct=function(){
    var arr=[];
    var obj={};
    for(var i=0;i
27.删除元素
function array_delete($array, $element) {
    return array_diff($array, [$element]);
   // if(($key = array_search($array, $element)) !== false) {
      //  unset($array[$key]);
   // }
//$array = array_filter($array, function($e) use ($del_val) {
 //   return ($e !== $del_val);
//});
//$array = array(14,22,37,42,58,61,73,82,96,10);
//array_splice($array, array_search(58, $array ), 1);
}

array_delete( [312, 401, 1599, 3], 401 ) // returns [312, 1599, 3]

28.RandomString
def random_string(length):
    return "".join(random.choice(string.letters + string.digits) for i in xrange(length))


function generateRandomString($length = 10) {
    $characters = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
    $charactersLength = strlen($characters);
    $randomString = "";
    for ($i = 0; $i < $length; $i++) {
        $randomString .= $characters[rand(0, $charactersLength - 1)];
    }
    return $randomString;
}
//$randomString = substr(str_shuffle("0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ"), 0, $length);
//$string = bin2hex(openssl_random_pseudo_bytes(10));20 char long hexdec string
29.保存文件
$ch = curl_init("http://example.com/image.php");
$fp = fopen("/my/folder/flower.gif", "wb");
curl_setopt($ch, CURLOPT_FILE, $fp);
curl_setopt($ch, CURLOPT_HEADER, 0);
curl_exec($ch);
curl_close($ch);
fclose($fp);

30.插入数组元素
function array_insert(&$array, $position, $insert)
{
    if (is_int($position)) {
        array_splice($array, $position, 0, $insert);
    } else {
        $pos   = array_search($position, array_keys($array));
        $array = array_merge(
            array_slice($array, 0, $pos),
            $insert,
            array_slice($array, $pos)
        );
    }
}
$arr = [
    "name"  => [
        "type"      => "string",
        "maxlength" => "30",
    ],
    "email" => [
        "type"      => "email",
        "maxlength" => "150",
    ],
];

array_insert(
    $arr,
    "email",
    [
        "phone" => [
            "type"   => "string",
            "format" => "phone",
        ],
    ]
);
// ->
array (
  "name" =>
  array (
    "type" => "string",
    "maxlength" => "30",
  ),
  "phone" =>
  array (
    "type" => "string",
    "format" => "phone",
  ),
  "email" =>
  array (
    "type" => "email",
    "maxlength" => "150",
  ),
)
31.验证ip
function validate_ip($ip)
    {
        if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE) === false)
            return false;
        if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_RES_RANGE) === false)
            return false;
        if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV4) === false && filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_IPV6) === false)
            return false;

        return true;
    }
    function validate_ip($ip)
{
    if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) === false)
    {
        return false;
    }

    self::$ip = sprintf("%u", ip2long($ip)); // you seem to want this

    return true;
}
32.get ip
function get_ip_address(){
    foreach (array("HTTP_CLIENT_IP", "HTTP_X_FORWARDED_FOR", "HTTP_X_FORWARDED", "HTTP_X_CLUSTER_CLIENT_IP", "HTTP_FORWARDED_FOR", "HTTP_FORWARDED", "REMOTE_ADDR") as $key){
        if (array_key_exists($key, $_SERVER) === true){
            foreach (explode(",", $_SERVER[$key]) as $ip){
                $ip = trim($ip); // just to be safe

                if (filter_var($ip, FILTER_VALIDATE_IP, FILTER_FLAG_NO_PRIV_RANGE | FILTER_FLAG_NO_RES_RANGE) !== false){
                    return $ip;
                }
            }
        }
    }
}
33.选出最长的单词
function LongestWord(sen) {
    var words = sen.match(/w+/g);
    if (words !== null) {
        var maxWords = {
            index: 0,
            length: 0
        };
        for (var i = 0, length = words.length; i < length; i++) {
            if (words[i].length > maxWords.length) {
                maxWords = {
                    index: i,
                    length: words[i].length
                }
            }
        }
        return words[maxWords.index];
    }
    return words;
}
34.map
var oldArr = [{first_name:"Colin",last_name:"Toh"},{first_name:"Addy",last_name:"Osmani"},{first_name:"Yehuda",last_name:"Katz"}];

function getNewArr(){
        
    return oldArr.map(function(item,index){
        item.full_name = [item.first_name,item.last_name].join(" ");
        return item;
    });
    
}

35.统计一个数组中有多少个不重复的单词
var arr = ["apple","orange","apple","orange","pear","orange"];
//https://github.com/es-shims/es5-shim
function getWordCnt(){
    var obj = {};
    
    for(var i= 0, l = arr.length; i< l; i++){
        var item = arr[i];
        obj[item] = (obj[item] +1 ) || 1;//obj[item]为undefined则返回1
    }
    
    return obj;
}
function getWordCnt(){
    return arr.reduce(function(prev,next){
        prev[next] = (prev[next] + 1) || 1;
        return prev;
    },{});
}
36.约瑟夫环
function yuesefu($n,$m) {  
    $r=0;  
    for($i=2; $i<=$n; $i++) {
        $r=($r+$m)%$i;  
    }
    return $r+1;  
}  
echo yuesefu(10,3)."是猴王";
37.判断一个字符串中的字符是否都在另一个中出现
function charsissubset($h, $n) {
    return preg_match("/[^" . preg_quote($h) . "]/u", $n) ? 0 : 1;
}

echo charsissubset("abcddcba", "abcde"); // false
echo charsissubset("abcddcba", "abcd"); // true
echo charsissubset("abcddcba", "badc"); // true
echo charsissubset("汉字", "字"); // true
echo charsissubset("汉字", "漢字"); // false
38.add(2)(3)(4)
function add(a) {
  var temp = function(b) {
    return add(a + b);
  }
  temp.valueOf = temp.toString = function() {
    return a;
  };
  return temp;
}
var ans = add(2)(3)(4);//9
function add(num){
  num += ~~add;
  add.num = num;
  return add;
}
add.valueOf = add.toString = function(){return add.num};
var ans = add(3)(4)(5)(6);  // 18
39.打印出Fibonacci数
function fn(n) {
  var a = [];
  a[0] = 0, a[1] = 1;
  for(var i = 2; i < n; i++)
    a[i] = a[i - 1] + a[i - 2];
  for(var i = 0; i < n; i++)
    console.log(a[i]);
}
40.把URL参数解析为一个对象
function parseQueryString(url) {
  var obj = {};
  var a = url.split("?");
  if(a.length === 1) return obj;
  var b = a[1].split("&");
  for(var i = 0, length = b.length; i < length; i++) {
    var c = b[i].split("=");
    obj[c[0]] = c[1];
  }
  return obj;
}
var url = "http://witmax.cn/index.php?key0=0&key1=1&key2=2";
var obj = parseQueryString(url);
console.log(obj.key0, obj.key1, obj.key2);  // 0 1 2 

41.判断数据类型
function isNumber(obj) {
    return Object.prototype.toString.call(obj) === "[object Number]"
}//对于NaN也返回true
function isNumber(obj) {
    return obj === +obj
}
// 判断字符串
function isString(obj) {
    return obj === obj+""
}
// 判断布尔类型
function isBoolean(obj) {
    return obj === !!obj
}
42.javascript sleep
function sleep(numberMillis) {
    var now = new Date();
    var exitTime = now.getTime() + numberMillis;
    while (true) {
        now = new Date();
        if (now.getTime() > exitTime)
        return;
    }
}
43.爬虫
def splider():
    # -*- coding:utf-8 -*-
    #发送data表单数据
    import urllib2
    import urllib
    url = "http://www.someserver.com/register.cgi"
    values = {
        "name" : "Andrew",
        "location" : "NJU",
        "language" : "Python"
    }
    user_agent = "Mozilla/4.0 (compatible; MSIE 5.5; Windows NT)" 
    header = {"User-Agent" : user_agent}
    data = urllib.urlencode(values) #data数据需要编码成标准形式
    #print data
    http_handler = urllib2.HTTPHandler(debuglevel = 1)#Debug log
    https_handler = urllib2.HTTPSHandler(debuglevel = 1)
    opener = urllib2.build_opener(http_handler, https_handler)
    urllib2.install_opener(opener)
    req = urllib2.Request(url, data) #发送请求同时传送data表单
    #req = urllib2.Request(url, data, header) #url 表单数据 伪装头部
    reponse = urllib2.urlopen(req, timeout=10) #接受反馈数据
    html = reponse.read() #读取反馈数据
    print response.info()
    print response.getcode()
    redirected = response.geturl() == url
    """
    full_url = url + "?" + data
    data = urllib2.open(full_url)
    """
    #返回错误码, 200不是错误, 不会引起异常
    headers = {
    "Referer": "http://www.cnbeta.com/articles"
    }
    proxy_handler = urllib2.ProxyHandler({"http" : "http://some-proxy.com:8080"})
    opener = urllib2.build_opener(proxy_handler)
    urllib2.install_opener(opener)  #urllib2.install_opener() 会设置 urllib2 的全局 opener
    req = urllib2.Request(
    url = "http://secure.verycd.com/signin/*/http://www.verycd.com/",
    data = post_data, 
    headers = headers
    )
    try:
        urllib2.urlopen(req)
    except urllib2.HTTPError, e:
        print e.code
        #print e.read()
44.判断数据类型
function type(o) {
    var t, c, n;
    if (o === null) 
        return "null";
    if (o !== o)
        return "nan";
    if ((t = typeof o) !== "object") 
        return t;  // 识别原始值的类型和函数
    if ((c = classof(o)) !== "Object")
        return c;  // 识别出大多数内置类型
    if (o.constructor && typeof o.constructor === "function" &&
        (n = o.constructor.getName()))
        return n;  //如果对象构造函数名字存在, 则返回
    return "Object";  // 无法识别类型返回"Object"
}
function classof(o) {
    return Object.prototype.toString.call(o).slice(8, -1);
}
Function.prototype.getName = function() {
    if ("name" in this)
        return this.name;
    return this.name = this.toString().match(/functions*([^(]*)(/)[1];
}
45.实现千分位分隔
function mysplit(s){
        if(/[^0-9.]/.test(s)) return "invalid value";
        s=s.replace(/^(d*)$/,"$1.");
        s=(s+"00").replace(/(d*.dd)d*/,"$1");
        s=s.replace(".",",");
        var re=/(d)(d{3},)/;
        while(re.test(s))
            s=s.replace(re,"$1,$2");
        s=s.replace(/,(dd)$/,".$1");
        return "￥" + s.replace(/^./,"0.")
    }
46.随机产生颜色
function randomVal(val){
        return Math.floor(Math.random()*(val + 1));
    }

    function randomColor(){
        return "rgb(" + randomVal(255) + "," + randomVal(255) + "," + randomVal(255) + ")";
    }
47.生成随机的IP地址，规则类似于192.168.11.0/24
RANDOM_IP_POOL=["192.168.10.222/0"]
def __get_random_ip():
    str_ip = RANDOM_IP_POOL[random.randint(0,len(RANDOM_IP_POOL) - 1)]
    str_ip_addr = str_ip.split("/")[0]
    str_ip_mask = str_ip.split("/")[1]
    ip_addr = struct.unpack(">I",socket.inet_aton(str_ip_addr))[0]
    mask = 0x0
    for i in range(31, 31 - int(str_ip_mask), -1):
        mask = mask | ( 1 << i)
    ip_addr_min = ip_addr & (mask & 0xffffffff)
    ip_addr_max = ip_addr | (~mask & 0xffffffff)
    return socket.inet_ntoa(struct.pack(">I", random.randint(ip_addr_min, ip_addr_max)))
48.倒计时
var total = 500;
var timer = null;

var tiktock = document.getElementById("tiktock");
var btn = document.getElementById("btn");

function countdown(){
    timer = setInterval(function(){
        total--;
        if (total<=0) {
            clearInterval(timer);
            tiktock.innerHTML= "0:00";
        }else{
            var ss = Math.floor(total/100);
            var ms = total-Math.floor(total/100)*100;
            tiktock.innerHTML=ss + ":" + ms;
        }
    },10);
};
btn.addEventListener("click", countdown, false);

49.[1,2,3] ->"{1,2,3}"
class intSet(object):

def __init__(self):
    # creat an empty set of integers
    self.vals = []

def insert(self, e):
    # assume e is an interger, and insert it 
    if not(e in self.vals):
        self.vals.append(e)

def member(self, e):
    return e in self.vals

def remove(self, e):
    try:
        self.vals.remove(e)
    except:
        raise ValueError(str(e) + "not found")


def __str__(self):
    # return a string representation of self
    self.vals.sort()
    return "{" + ",".join([str(e) for e in self.vals]) + "}"
50.转义过滤
//纯数字的参数intval强制取整
//其他参数值进行过滤或者转义
//filter_input() 函数来过滤一个 POST 变量
if (!filter_input(INPUT_POST, "email", FILTER_VALIDATE_EMAIL))
 {
 echo "E-Mail is not valid";
 }
else
 {
 echo "E-Mail is valid";
 }
    protected function zaddslashes($string, $force = 0, $strip = FALSE)
    {   
        if (!defined("MAGIC_QUOTES_GPC"))
        {   
         define("MAGIC_QUOTES_GPC", "");
        }   
        if (!MAGIC_QUOTES_GPC || $force)
        {   
         if (is_array($string)) {
             foreach ($string as $key => $val)
             {   
                 $string[$key] = $this->zaddslashes($val, $force, $strip);
             }   
         }   
         else
         {   
             $string = ($strip ? stripslashes($string) : $string);
             $string = htmlspecialchars($string);
         }   
        }   
        return $string;
     }
51.构造IP
function getIPaddress()
{
    $IPaddress = "";
    if (isset($_SERVER)) {
        if (isset($_SERVER["HTTP_X_FORWARDED_FOR"])) {
            $IPaddress = $_SERVER["HTTP_X_FORWARDED_FOR"];
        } else if (isset($_SERVER["HTTP_CLIENT_IP"])) {
            $IPaddress = $_SERVER["HTTP_CLIENT_IP"];
        } else {
            $IPaddress = $_SERVER["REMOTE_ADDR"];
        }
    } else {
        if (getenv("HTTP_X_FORWARDED_FOR")) {
            $IPaddress = getenv("HTTP_X_FORWARDED_FOR");
        } else if (getenv("HTTP_CLIENT_IP")) {
            $IPaddress = getenv("HTTP_CLIENT_IP");
        } else {
            $IPaddress = getenv("REMOTE_ADDR");
        }
    }
    return $IPaddress;
}
function curlPost($url, $post="", $autoFollow=0){
        $ch = curl_init();
        $user_agent = "Safari Mozilla/5.0 (Macintosh; Intel Mac OS X 10_9_1) AppleWebKit/537.73.11 (KHTML, like Gecko) Version/7.0.1 Safari/5
        curl_setopt($ch, CURLOPT_USERAGENT, $user_agent);
        
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1); 
        curl_setopt($ch, CURLOPT_HEADER, 0); 
        curl_setopt($ch, CURLOPT_HTTPHEADER, array("X-FORWARDED-FOR:61.135.169.125", "CLIENT-IP:".getIPaddress()));  //构造IP
        curl_setopt($ch, CURLOPT_REFERER, "http://www.baidu.com/");   //构造来路
        curl_setopt($ch, CURLOPT_CUSTOMREQUEST, "GET");
        if($autoFollow){
            curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);  //启动跳转链接
            curl_setopt($ch, CURLOPT_AUTOREFERER, true);  //多级自动跳转
        }   
        //  
        if($post!=""){
            curl_setopt($ch, CURLOPT_POST, 1);//post提交方式
            curl_setopt($ch, CURLOPT_POSTFIELDS, $post);
        }   
        
        $output = curl_exec($ch);
        curl_close($ch);
        return $output;
    }
52.文件名生成唯一
function unique_filename() {
    $time = !empty($_SERVER["REQUEST_TIME_FLOAT"]) ? $_SERVER["REQUEST_TIME_FLOAT"] : mt_rand();
    $addr = !empty($_SERVER["REMOTE_ADDR"])        ? $_SERVER["REMOTE_ADDR"]        : mt_rand();
    $port = !empty($_SERVER["REMOTE_PORT"])        ? $_SERVER["REMOTE_PORT"]        : mt_rand();
    $ua   = !empty($_SERVER["HTTP_USER_AGENT"])    ? $_SERVER["HTTP_USER_AGENT"]    : mt_rand();
    return md5(uniqid(mt_rand(), true).$time.$addr.$port.$ua.mt_rand());
}

53.PHP实现钩子和插件系统
/**
 * Attach (or remove) multiple callbacks to an event and trigger those callbacks when that event is called.
 * 绑定或移除多个回调函数到事件,当事件被调用时触发回调函数.
 *
 * @param string $event name
 * @param mixed  $value the optional value to pass to each callback
 * @param mixed  $callback the method or function to call - FALSE to remove all callbacks for event
 */
function event($event, $value = NULL, $callback = NULL) {
    static $events;
    if($callback !== NULL) {
        if($callback) {
            $events[$event][] = $callback; // 添加事件
        } else {
            unset($events[$event]); // 移除事件里所有的回调函数
        }
    } else if(isset($events[$event])) {
        foreach($events[$event] as $function) {
            $value = call_user_func($function, $value); // 调用事件
        }
        return $value;
    }
}
// 添加事件
event("filter_text", NULL, function($text) { return htmlspecialchars($text); });
event("filter_text", NULL, function($text) { return nl2br($text); });
// 移除事件里所有的回调函数
// event("filter_text", NULL, FALSE);
// 调用事件
$text = event("filter_text", $_POST["text"]);
54.字符串首字母大写的实现方式
String.prototype.firstUpperCase = function(){
    return this.replace(/(w)(w*)/g, function($0, $1, $2) {
        return $1.toUpperCase() + $2.toLowerCase();
    });
}
//这只能改变字符串首字母
String.prototype.firstUpperCase=function(){
    return this.replace(/^S/,function(s){return s.toUpperCase();});
}
55.获取url参数
 function getQueryString(key){
        var reg = new RegExp("(^|&)"+key+"=([^&]*)(&|$)");
        var result = window.location.search.substr(1).match(reg);
        return result?decodeURIComponent(result[2]):null;
      }
function getRequest() {   
       var url = window.location.search; //获取url中"?"符后的字串   
       var theRequest = new Object();   
       if (url.indexOf("?") != -1) {   
          var str = url.substr(1);   
          strs = str.split("&");   
          for(var i = 0; i < strs.length; i ++) {   
             theRequest[strs[i].split("=")[0]]=decodeURI(strs[i].split("=")[1]); 

          }   
       }   
       return theRequest;   
    }
56.过滤
var array = [
    {
        "title": 123,
        "num": 1,
        "type": [{"name": "A", "num": 1}, {"name": "B", "num": 1}, {"name": "C", "num": 0}]
    }, {
        "title": 321,
        "num": 1,
        "type": [{"name": "D", "num": 0}, {"name": "E", "num": 1}, {"name": "F", "num": 0}]
    }];

array.forEach(function (x) {
    x.type = x.type.filter(function (y) {
        return y.num != 0;
    });
});

57.随机生成-50到50之间的不包括0的整数
function my_rand(){
    $num = mt_rand(1, 50); 
    $rand = mt_rand(1, 10);

    return $rand > 4 ? $num : -$num;//控制生成正负数的比例为4：6
}
58.时间对比
function compareDate(date1, date2){
      var  difArr, unitArr;

      date1 = new Date(date1);
      date2 = new Date(date2);
      difArr = [date1.getFullYear() - date2.getFullYear(), date1.getMonth() -date2.getMonth(),date1.getDate() - date2.getDate(),date1.getHours() - date2.getHours(), date1.getMinutes() - date2.getMinutes(),date1.getSeconds() - date2.getSeconds()];
      unitArr = ["年","月","日","时","分","秒"]
      for(var i = 0; i < 6;i++){
        if(difArr[i] !== 0){
          return Math.abs(difArr[i]) + unitArr[i];
        }
      }
    }
59.数组去重
//传入数组
  function unique(arr){
    var tmpArr = [];
    for(var i=0; i
60.继承
/*
 * 基类，定义属性
 */
function Person(name, age) {
    this.name = name;
    this.age = age;
}

/*
 * 基类，定义方法
 */
Person.prototype.selfIntroduce = function () {
    console.log("name: " + this.name);
    console.log("age: " + this.age);
}

/*
 * 子类，定义子类的属性
 */
function Student(name, age, school) {
  // 调用基类的构造函数
    Person.call(this, name, age);
    this.school = school;
}

// 使子类继承基类
Student.prototype = new Person();

/*
 * 定义子类的方法
 */
Student.prototype.goToSchool = function() {
  // some code..
}

/*
 * 扩展并调用了超类的方法
 */
Student.prototype.selfIntroduce = function () {
    Student.prototype.__proto__.selfIntroduce.call(this);
    console.log("school: " + this.school);
}

var student = new Student("John", 22, "My School");
student.selfIntroduce();

61.Unicode和Utf-8编码的互相转换
/**
 * utf8字符转换成Unicode字符
 * @param  [type] $utf8_str Utf-8字符
 * @return [type]           Unicode字符
 */
function utf8_str_to_unicode($utf8_str) {
    $unicode = 0;
    $unicode = (ord($utf8_str[0]) & 0x1F) << 12;
    $unicode |= (ord($utf8_str[1]) & 0x3F) << 6;
    $unicode |= (ord($utf8_str[2]) & 0x3F);
    return dechex($unicode);
}

/**
 * Unicode字符转换成utf8字符
 * @param  [type] $unicode_str Unicode字符
 * @return [type]              Utf-8字符
 */
function unicode_to_utf8($unicode_str) {
    $utf8_str = "";
    $code = intval(hexdec($unicode_str));
    //这里注意转换出来的code一定得是整形，这样才会正确的按位操作
    $ord_1 = decbin(0xe0 | ($code >> 12));
    $ord_2 = decbin(0x80 | (($code >> 6) & 0x3f));
    $ord_3 = decbin(0x80 | ($code & 0x3f));
    $utf8_str = chr(bindec($ord_1)) . chr(bindec($ord_2)) . chr(bindec($ord_3));
    return $utf8_str;
}

62.gzip编码
function curl_get($url, $gzip=false){
 $curl = curl_init($url);
 curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
 curl_setopt($curl, CURLOPT_CONNECTTIMEOUT, 10);
 if($gzip) curl_setopt($curl, CURLOPT_ENCODING, "gzip"); // 关键在这里
 $content = curl_exec($curl);
 curl_close($curl);
 return $content;
}
$url = "http://api.stackexchange.com/2.2/tags?order=asc&sort=popular&site=stackoverflow&tag=qt";
//$data = file_get_contents("compress.zlib://".$url);
63.Python中文时间
#!/usr/bin/env 
# -*- coding: utf-8 -*-

from datetime import datetime
nt=datetime.now()
print(nt.strftime("%Y年%m月%d日 %H时%M分%S秒").decode("utf-8"))#2015年08月10日 11时25分04秒
print(nt.strftime("%Y{y}%m{m}%d{d}").format(y="年", m="月", d="日"))
64.list分组,按照下标顺序分成3组：[3, 8, 9] [4, 1, 10] [6, 7, 2, 5]
a=[1,2,3,4,5,6,7,8,9,10]
[a[i:i+3] for i in xrange(0,len(a),3)]
64.curl上传文件
$ch = curl_init();

$data = array("name" => "Foo", "file" => "@/home/vagrant/test.png");

curl_setopt($ch, CURLOPT_URL, "http://localhost/test/curl/load_file.php");
curl_setopt($ch, CURLOPT_POST, 1);
curl_setopt($ch, CURLOPT_SAFE_UPLOAD, false);    // 5.6 给改成 true了, 弄回去 
curl_setopt($ch, CURLOPT_POSTFIELDS, $data);

curl_exec($ch);

65.IP地址转换为整数型
$ipArr  = explode(".",$_SERVER["REMOTE_ADDR"]);
$ip     = $ipArr[0] * 0x1000000
        + $ipArr[1] * 0x10000
        + $ipArr[2] * 0x100
        + $ipArr[3];
        //数字型的IP转为字符型:
$ipVal = $row["client_IP"];
$ipArr = array(
        0 => floor(  $ipVal / 0x1000000) );
$ipVint   = $ipVal-($ipArr[0]*0x1000000); // for clarity
$ipArr[1] = ($ipVint & 0xFF0000)  >> 16;
$ipArr[2] = ($ipVint & 0xFF00  )  >> 8;
$ipArr[3] =  $ipVint & 0xFF;
$ipDotted = implode(".", $ipArr);
66.保存base64图片
$base64_url = "data:image/jpeg;base64,xxxxxxxxxxxxxxxxxxxxxx";
$base64_body = substr(strstr($base64_url,","),1);
$data= base64_decode($base64_body );

//存储or创建图片：

file_put_contents($file_path,$data);

或$image = imagecreatefromstring($data);
 $size  =  getimagesizefromstring ( $data);var_dump($size);

//读取图片文件，转换成base64编码格式
$image_file = "test.jpg";
$image_info = getimagesize($image_file);
$base64_image_content = "data:{$image_info["mime"]};base64," . chunk_split(base64_encode(file_get_contents($image_file)));
 
//保存base64字符串为图片
//匹配出图片的格式
if (preg_match("/^(data:s*image/(w+);base64,)/", $base64_image_content, $result)){
  $type = $result[2];
  $new_file = "./test.{$type}";
  if (file_put_contents($new_file, base64_decode(str_replace($result[1], "", $base64_image_content)))){
    echo "新文件保存成功：", $new_file;
  }
 
}
?>
 

67.日志记录print_r( $value, true )
/**

错误日志类
*/
class C_Log
{
/**

日志保存目录

@var string
*/
private $path = "";
/**

只能运行一个实例

@var [type]
*/
private static $instance;
/**

构造函数

初始化日志文件地址
*/
function __construct($path)
{
$this->path = $path;
}

public function logPrint($name,$value)
{

   //获取时间
   $_o = date("Y-m-d H:m:s",time())."
";
   $_o .= "==".  $name . "==";
   //打印内容
   if( is_array( $value ) || is_object( $value ) ){
       $_o .= print_r( $value, true ). "
";
     } else {
         $_o .= $value. "
";
     }
     //输出到文件
     $this->_log($_o);
}
/**fdf

打印日志

@return [type] [description]
*/
private function _log($log){
error_log($log,3,$this->path);
}
/**

输出日志

@return [type] [description]
*/
public static function log($name, $value)
{
if (empty(self::$instance)) {

   self::$instance = new C_Log(__DIR__."/error_log.log");
}
self::$instance->logPrint($name, $value);
}
}

68.过滤子类
function getByClass(parent, classname) {
    var tags = parent.getElementsByTagName("*");
    return [].filter.call(tags, function(t) {
        return t.classList.contains(classname);
    });
}
//

function getByClass(parent, classname) {
    return parent.querySelectorAll("." + classname);
}
69.JSON.stringify
function setProp(obj) {
    for (var p in obj) {
        switch (typeof (obj[p])) {
            case "object":
                setProp(obj[p]);
                break;
            case "undefined":
                obj[p] = "";
                break;
        }
    }
    return obj;
}

JSON.stringify(setProp({ a: 1, b: 2, c: undefined }));//{"a":1,"b":2,"c":""}

70.判断用户的IP是否局域网IP
function is_local_ip($ip_addr = null) {
    if (is_null($ip_addr)) {
        $ip_addr = $_SERVER["REMOTE_ADDR"];
    }
    $ip = ip2long($ip_addr);
    return $ip & 0xffff0000 == 0xc0a80000 // 192.168.0.0/16
        || $ip & 0xfff00000 == 0xac100000 // 172.16.0.0/12
        || $ip & 0xff000000 == 0xa0000000 // 10.0.0.0/8
        || $ip & 0xff000000 == 0x7f000000 // 127.0.0.0/8
    ;
}
71.遍历出当月的所有日子和星期
var d = new Date();         // 这是当天
d.setDate(1);               // 这就是1号
var weekday = d.getDay();   // 1号星期几，从星期天为0开始

d.setMonth(d.getMonth() + 1);
d.setDate(0);               // 这两句得到最当月最后一天
var end = d.getDate();      // 最后一天的日，比如8月就是31

var days = [];
for (var i = 0; i < end; i++) {
    days[i] = {
        day: i + 1,
        week: (weekday + i) % 7
    }
}


console.log(days);
72.Downloading Data From localStorage
var myData = {
    "a": "a",
    "b": "b",
    "c": "c"
};
// add it to our localstorage
localStorage.setItem("data", JSON.stringify(myData));

// encode the data into base64
base64 = window.btoa(localStorage.getItem("data"));

// create an a tag
var a = document.createElement("a");
a.href = "data:application/octet-stream;base64," + base64;
a.innerHTML = "Download";

// add to the body
document.body.appendChild(a);

73."数据类型"判断函数
function datatypeof(arg){
    return Object.prototype.toString.call(arg).match(/[objects(w+)]/)[1];
}
74.二维数组去除重复，重复值相加
$arr = array(
    array("id" => 123, "name" => "张三", "amount"=>"1"),
    array("id" => 123, "name" => "李四", "amount" => "1"),
    array("id" => 124, "name" => "王五", "amount" => "1"),
    array("id" => 125, "name" => "赵六", "amount" => "1"),
    array("id" => 126, "name" => "赵六", "amount" => "2"),
    array("id" => 126, "name" => "赵六", "amount" => "2")
);

$new = array();

foreach($arr as $row){
    if(isset($new[$row["name"]])){
        $new[$row["name"]]["amount"] += $row["amount"];
    }else{
        $new[$row["name"]] = $row;
    }
}

75.含有从属关系的元素重新排列
$arr = array(
    array("id"=>21, "pid"=>0, "name"=>"aaa"),
    array("id"=>22, "pid"=>0, "name"=>"bbb"),
    array("id"=>23, "pid"=>0, "name"=>"ccc"),
    array("id"=>24, "pid"=>23, "name"=>"ffffd"),
    array("id"=>25, "pid"=>23, "name"=>"eee"),
    array("id"=>26, "pid"=>22, "name"=>"fff"),
    );

$temp=[];
foreach ($arr as $item)
{
    list($id,$pid,$name) = array_values($item); // 取出数组的值并分别生成变量

    if(array_key_exists($pid, $temp)) 
    // 检查临时数组$temp中是否存在键名与$pid的值相同的键
    {
        $temp[$pid]["child"][]=array("id"=>$id,"pid"=>$pid,"name"=>$name);
        // 如果存在则新增数组至临时数组中键名为 $pid 的子元素 child 内
    }else
        $temp[$id]=array("id"=>$id,"pid"=>$pid,"name"=>$name);
        // 如果不存在则新增数组至临时数组中并设定键名为 $id
}

$array = array_values($temp);
// 将临时数组中以 $id 为键名的键修改为数字索引

echo "
";
print_r($array);
//or 
foreach ($arr as $item)
{
    if (array_key_exists($item["pid"], $temp))
    {       
        $temp[$item["pid"]]["child"][]=$item;
    }else
        $temp[$item["id"]]=$item;
}
76.随机中文字符
//正则表达式匹配中文[u4e00-u9fa5]
//parseInt("4E00",16) 19968 parseInt("9FA5",16);20901
var randomHz=function(){
    eval( "var word=" +  ""u" + (Math.round(Math.random() * 20901) + 19968).toString(16)+""");
    return word;
}
for(i=0;i<100;i++){
    console.log(randomHz());
}
77.jQuery解析url
$(document).ready(function () {
    var url = "http://iwjw.com/codes/code-repository?id=12#top";
    var a = $("", { href: url});
    var sResult = "Protocol: " + a.prop("protocol") + "
"     + "Host name: " + a.prop("hostname") + "
"
    + "Path: " + a.prop("pathname") + "
"
    + "Query: " + a.prop("search") + "
"
    + "Hash: " + a.prop("hash");
    $("span").html(sResult);
});

78.用JS实现一个数组合并的方法（要求去重）
var arr1 = ["a"];
var arr2 = ["b", "c"];
var arr3 = ["c", ["d"], "e", undefined, null];

var concat = (function(){
  // concat arr1 and arr2 without duplication.
  var concat_ = function(arr1, arr2) {
    for (var i=arr2.length-1;i>=0;i--) {
      arr1.indexOf(arr2[i]) === -1 ? arr1.push(arr2[i]) : 0;
    }
  };
  // concat arbitrary arrays.
  // Instead of alter supplied arrays, return a new one.
  return function(arr) {
    var result = arr.slice();
    for (var i=arguments.length-1;i>=1;i--) {
      concat_(result, arguments[i]);
    }
    return result;
  };
}());
执行：concat(arr1, arr2, arr3)
返回：[ "a", null, undefined, "e", [ "d" ], "c", "b" ]
var merge = function() {
    return Array.prototype.concat.apply([], arguments)
  }

merge([1,2,4],[3,4],[5,6]);
//[1, 2, 4, 3, 4, 5, 6]
79.字节转化
function convert($size)
{
    $unit = array("b", "kb", "mb", "gb", "tb", "pb");

    return @round($size / pow(1024, ($i = floor(log($size, 1024)))), 2) . " " . $unit[$i];
}
echo convert(memory_get_usage());
function cacheMem($key)
{
    static $mem = null;
    if ($mem === null) {
        $mem = new Memcache();
        $mem->connect("127.0.0.1", 11211);
    }

    $data = $mem->get($key);
    if (empty($data)) {
        $data = date("Y-m-d H:i:s");
        $mem->set($key, $data);
    }

    return $data;
}