PHP常用到的功能函数

wenhainan

1、PHP加密解密

PHP加密和解密函数可以用来加密一些有用的字符串存放在数据库里，并且通过可逆解密字符串，该函数使用了base64和MD5加密和解密。

复制代码代码如下:
function encryptDecrypt($key, $string, $decrypt){ 
    if($decrypt){ 
        $decrypted = rtrim(mcrypt_decrypt(MCRYPT_RIJNDAEL_256, md5($key), base64_decode($string), MCRYPT_MODE_CBC, md5(md5($key))), "12"); 
        return $decrypted; 
    }else{ 
        $encrypted = base64_encode(mcrypt_encrypt(MCRYPT_RIJNDAEL_256, md5($key), $string, MCRYPT_MODE_CBC, md5(md5($key)))); 
        return $encrypted; 
    } 
}

 


使用方法如下：

复制代码代码如下:
//以下是将字符串“Helloweba欢迎您”分别加密和解密 
//加密： 
echo encryptDecrypt(\'password\', \'Helloweba欢迎您\',0); 
//解密： 
echo encryptDecrypt(\'password\', \'z0JAx4qMwcF+db5TNbp/xwdUM84snRsXvvpXuaCa4Bk=\',1);

 

2、PHP生成随机字符串

 

当我们需要生成一个随机名字，临时密码等字符串时可以用到下面的函数：

复制代码代码如下:
function generateRandomString($length = 10) { 
    $characters = \'0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ\'; 
    $randomString = \'\'; 
    for ($i = 0; $i < $length; $i++) { 
        $randomString .= $characters[rand(0, strlen($characters) - 1)]; 
    } 
    return $randomString; 
}

 


使用方法如下：

复制代码代码如下:
echo generateRandomString(20);

 


3、PHP获取文件扩展名（后缀）

 

以下函数可以快速获取文件的扩展名即后缀。

复制代码代码如下:
function getExtension($filename){ 
  $myext = substr($filename, strrpos($filename, \'.\')); 
  return str_replace(\'.\',\'\',$myext); 
}

 


使用方法如下：

复制代码代码如下:
$filename = \'我的文档.doc\'; 
echo getExtension($filename);

 

4、PHP获取文件大小并格式化

 

以下使用的函数可以获取文件的大小，并且转换成便于阅读的KB，MB等格式。

复制代码代码如下:
function formatSize($size) { 
    $sizes = array(" Bytes", " KB", " MB", " GB", " TB", " PB", " EB", " ZB", " YB"); 
    if ($size == 0) {  
        return(\'n/a\');  
    } else { 
      return (round($size/pow(1024, ($i = floor(log($size, 1024)))), 2) . $sizes[$i]);  
    } 
}

使用方法如下：

复制代码代码如下:
$thefile = filesize(\'test_file.mp3\'); 
echo formatSize($thefile);

 

5、PHP替换标签字符

 

有时我们需要将字符串、模板标签替换成指定的内容，可以用到下面的函数：

复制代码代码如下:
function stringParser($string,$replacer){ 
    $result = str_replace(array_keys($replacer), array_values($replacer),$string); 
    return $result; 
}

 


使用方法如下：

复制代码代码如下:
$string = \'The {b}anchor text{/b} is the {b}actual word{/b} or words used {br}to describe the link {br}itself\'; 
$replace_array = array(\'{b}\' => \'<b>\',\'{/b}\' => \'</b>\',\'{br}\' => \'<br />\'); 
 
echo stringParser($string,$replace_array);

 


6、PHP列出目录下的文件名

 

如果你想列出目录下的所有文件，使用以下代码即可：

复制代码代码如下:
function listDirFiles($DirPath){ 
    if($dir = opendir($DirPath)){ 
         while(($file = readdir($dir))!== false){ 
                if(!is_dir($DirPath.$file)) 
                { 
                    echo "filename: $file<br />"; 
                } 
         } 
    } 
}

 


使用方法如下：

复制代码代码如下:
listDirFiles(\'home/some_folder/\');

 

7、PHP获取当前页面URL

 

以下函数可以获取当前页面的URL，不管是http还是https。

复制代码代码如下:
function curPageURL() { 
    $pageURL = \'http\'; 
    if (!empty($_SERVER[\'HTTPS\'])) {$pageURL .= "s";} 
    $pageURL .= "://"; 
    if ($_SERVER["SERVER_PORT"] != "80") { 
        $pageURL .= $_SERVER["SERVER_NAME"].":".$_SERVER["SERVER_PORT"].$_SERVER["REQUEST_URI"]; 
    } else { 
        $pageURL .= $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"]; 
    } 
    return $pageURL; 
}

 


使用方法如下：

复制代码代码如下:
echo curPageURL();

 


8、PHP强制下载文件

有时我们不想让浏览器直接打开文件，如PDF文件，而是要直接下载文件，那么以下函数可以强制下载文件，函数中使用了application/octet-stream头类型。

复制代码代码如下:
function download($filename){ 
    if ((isset($filename))&&(file_exists($filename))){ 
       header("Content-length: ".filesize($filename)); 
       header(\'Content-Type: application/octet-stream\'); 
       header(\'Content-Disposition: attachment; filename="\' . $filename . \'"\'); 
       readfile("$filename"); 
    } else { 
       echo "Looks like file does not exist!"; 
    } 
}

使用方法如下：

复制代码代码如下:
download(\'/down/test_45f73e852.zip\');

 

9、PHP截取字符串长度

我们经常会遇到需要截取字符串(含中文汉字)长度的情况，比如标题显示不能超过多少字符，超出的长度用...表示，以下函数可以满足你的需求。

复制代码代码如下:
/* 
 Utf-8、gb2312都支持的汉字截取函数 
 cut_str(字符串, 截取长度, 开始长度, 编码); 
 编码默认为 utf-8 
 开始长度默认为 0 
*/ 
function cutStr($string, $sublen, $start = 0, $code = \'UTF-8\'){ 
    if($code == \'UTF-8\'){ 
        $pa = "/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/"; 
        preg_match_all($pa, $string, $t_string); 
 
        if(count($t_string[0]) - $start > $sublen) return join(\'\', array_slice($t_string[0], $start, $sublen))."..."; 
        return join(\'\', array_slice($t_string[0], $start, $sublen)); 
    }else{ 
        $start = $start*2; 
        $sublen = $sublen*2; 
        $strlen = strlen($string); 
        $tmpstr = \'\'; 
 
        for($i=0; $i<$strlen; $i++){ 
            if($i>=$start && $i<($start+$sublen)){ 
                if(ord(substr($string, $i, 1))>129){ 
                    $tmpstr.= substr($string, $i, 2); 
                }else{ 
                    $tmpstr.= substr($string, $i, 1); 
                } 
            } 
            if(ord(substr($string, $i, 1))>129) $i++; 
        } 
        if(strlen($tmpstr)<$strlen ) $tmpstr.= "..."; 
        return $tmpstr; 
    } 
}

使用方法如下：

复制代码代码如下:
$str = "jQuery插件实现的加载图片和页面效果"; 
echo cutStr($str,16);

10、PHP获取客户端真实IP

我们经常要用数据库记录用户的IP，以下代码可以获取客户端真实的IP：

复制代码代码如下:
//获取用户真实IP 
function getIp() { 
    if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown")) 
        $ip = getenv("HTTP_CLIENT_IP"); 
    else 
        if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown")) 
            $ip = getenv("HTTP_X_FORWARDED_FOR"); 
        else 
            if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown")) 
                $ip = getenv("REMOTE_ADDR"); 
            else 
                if (isset ($_SERVER[\'REMOTE_ADDR\']) && $_SERVER[\'REMOTE_ADDR\'] && strcasecmp($_SERVER[\'REMOTE_ADDR\'], "unknown")) 
                    $ip = $_SERVER[\'REMOTE_ADDR\']; 
                else 
                    $ip = "unknown"; 
    return ($ip); 
}

使用方法如下：

复制代码代码如下:
echo getIp();

 


11、PHP防止SQL注入

 

我们在查询数据库时，出于安全考虑，需要过滤一些非法字符防止SQL恶意注入，请看一下函数：

复制代码代码如下:
function injCheck($sql_str) {  
    $check = preg_match(\'/select|insert|update|delete|\'|/*|*|../|./|union|into|load_file|outfile/\', $sql_str);
    if ($check) { 
        echo \'非法字符！！\'; 
        exit; 
    } else { 
        return $sql_str; 
    } 
}

 


使用方法如下：

复制代码代码如下:
echo injCheck(\'1 or 1=1\');

 


12、PHP页面提示与跳转

 

我们在进行表单操作时，有时为了友好需要提示用户操作结果，并跳转到相关页面，请看以下函数：

复制代码代码如下:
function message($msgTitle,$message,$jumpUrl){ 
    $str = \'<!DOCTYPE HTML>\'; 
    $str .= \'<html>\'; 
    $str .= \'<head>\'; 
    $str .= \'<meta charset="utf-8">\'; 
    $str .= \'<title>页面提示</title>\'; 
    $str .= \'<style type="text/css">\'; 
    $str .= \'*{margin:0; padding:0}a{color:#369; text-decoration:none;}a:hover{text-decoration:underline}body{height:100%; font:12px/18px Tahoma, Arial,  sans-serif; color:#424242; background:#fff}.message{width:450px; height:120px; margin:16% auto; border:1px solid #99b1c4; background:#ecf7fb}.message h3{height:28px; line-height:28px; background:#2c91c6; text-align:center; color:#fff; font-size:14px}.msg_txt{padding:10px; margin-top:8px}.msg_txt h4{line-height:26px; font-size:14px}.msg_txt h4.red{color:#f30}.msg_txt p{line-height:22px}\'; 
    $str .= \'</style>\'; 
    $str .= \'</head>\'; 
    $str .= \'<body>\'; 
    $str .= \'<div class="message">\'; 
    $str .= \'<h3>\'.$msgTitle.\'</h3>\'; 
    $str .= \'<div class="msg_txt">\'; 
    $str .= \'<h4 class="red">\'.$message.\'</h4>\'; 
    $str .= \'<p>系统将在 <span style="color:blue;font-weight:bold">3</span> 秒后自动跳转,如果不想等待,直接点击 <a href="{$jumpUrl}">这里</a> 跳转</p>\'; 
    $str .= "<script>setTimeout(\'location.replace(\'".$jumpUrl."\')\',2000)</script>"; 
    $str .= \'</div>\'; 
    $str .= \'</div>\'; 
    $str .= \'</body>\'; 
    $str .= \'</html>\'; 
    echo $str; 
}

 

使用方法如下：

复制代码代码如下:
message(\'操作提示\',\'操作成功！\',\'http://www.jb51.net/\');

 


13、PHP计算时长

 

我们在处理时间时，需要计算当前时间距离某个时间点的时长，如计算客户端运行时长，通常用hh:mm:ss表示。

复制代码代码如下:
function changeTimeType($seconds) { 
    if ($seconds > 3600) { 
        $hours = intval($seconds / 3600); 
        $minutes = $seconds % 3600; 
        $time = $hours . ":" . gmstrftime(\'%M:%S\', $minutes); 
    } else { 
        $time = gmstrftime(\'%H:%M:%S\', $seconds); 
    } 
    return $time; 
}

 

使用方法如下：

复制代码代码如下:
$seconds = 3712; 
echo changeTimeType($seconds);

 

希望本文所述对大家的PHP程序设计有所帮助。

下面特为大家加点料希望大家能喜欢：

本文汇总了常用的PHP函数，包括获取客户端IP，字符串截取，下载等，详情请查看如下代码：

php
/**
 * 获取客户端IP
 * @return [string] [description]
 */
function getClientIp() {
 $ip = NULL;
 if (isset($_SERVER[\'HTTP_X_FORWARDED_FOR\'])) {
  $arr = explode(\',\', $_SERVER[\'HTTP_X_FORWARDED_FOR\']);
  $pos = array_search(\'unknown\',$arr);
  if(false !== $pos) unset($arr[$pos]);
  $ip = trim($arr[0]);
 }elseif (isset($_SERVER[\'HTTP_CLIENT_IP\'])) {
  $ip = $_SERVER[\'HTTP_CLIENT_IP\'];
 }elseif (isset($_SERVER[\'REMOTE_ADDR\'])) {
  $ip = $_SERVER[\'REMOTE_ADDR\'];
 }
 // IP地址合法验证
 $ip = (false !== ip2long($ip)) ? $ip : \'0.0.0.0\';
 return $ip;
}
 
/**
 * 获取在线IP
 * @return String
 */
function getOnlineIp($format=0) {
 global $S_GLOBAL;
 if(empty($S_GLOBAL[\'onlineip\'])) {
  if(getenv(\'HTTP_CLIENT_IP\') && strcasecmp(getenv(\'HTTP_CLIENT_IP\'), \'unknown\')) {
   $onlineip = getenv(\'HTTP_CLIENT_IP\');
  } elseif(getenv(\'HTTP_X_FORWARDED_FOR\') && strcasecmp(getenv(\'HTTP_X_FORWARDED_FOR\'), \'unknown\')) {
   $onlineip = getenv(\'HTTP_X_FORWARDED_FOR\');
  } elseif(getenv(\'REMOTE_ADDR\') && strcasecmp(getenv(\'REMOTE_ADDR\'), \'unknown\')) {
   $onlineip = getenv(\'REMOTE_ADDR\');
  } elseif(isset($_SERVER[\'REMOTE_ADDR\']) && $_SERVER[\'REMOTE_ADDR\'] && strcasecmp($_SERVER[\'REMOTE_ADDR\'], \'unknown\')) {
   $onlineip = $_SERVER[\'REMOTE_ADDR\'];
  }
  preg_match("/[\d\.]{7,15}/", $onlineip, $onlineipmatches);
  $S_GLOBAL[\'onlineip\'] = $onlineipmatches[0] ? $onlineipmatches[0] : \'unknown\';
 }
 
 if($format) {
  $ips = explode(\'.\', $S_GLOBAL[\'onlineip\']);
  for($i=0;$i<3;$i++) {
   $ips[$i] = intval($ips[$i]);
  }
  return sprintf(\'%03d%03d%03d\', $ips[0], $ips[1], $ips[2]);
 } else {
  return $S_GLOBAL[\'onlineip\'];
 }
}
 
 
 
/**
 * 获取url
 * @return [type] [description]
 */
function getUrl(){
 $pageURL = \'http\';
 if (isset($_SERVER["HTTPS"]) && $_SERVER["HTTPS"] == "on") {
 $pageURL .= "s";
 }
 $pageURL .= "://";
 if ($_SERVER["SERVER_PORT"] != "80") {
 $pageURL .= $_SERVER["HTTP_HOST"] . ":" . $_SERVER["SERVER_PORT"] . $_SERVER["REQUEST_URI"];
 } else {
 $pageURL .= $_SERVER["HTTP_HOST"] . $_SERVER["REQUEST_URI"];
 }
 return $pageURL;
}
 
/**
 * 获取当前站点的访问路径根目录
 * @return [type] [description]
 */
function getSiteUrl() {
 $uri = $_SERVER[\'REQUEST_URI\']?$_SERVER[\'REQUEST_URI\']:($_SERVER[\'PHP_SELF\']?$_SERVER[\'PHP_SELF\']:$_SERVER[\'SCRIPT_NAME\']);
 return \'http://\'.$_SERVER[\'HTTP_HOST\'].substr($uri, 0, strrpos($uri, \'/\')+1);
}
 
 
 
/**
 * 字符串截取，支持中文和其他编码
 * @param [string] $str  [字符串]
 * @param integer $start [起始位置]
 * @param integer $length [截取长度]
 * @param string $charset [字符串编码]
 * @param boolean $suffix [是否有省略号]
 * @return [type]   [description]
 */
function msubstr($str, $start=0, $length=15, $charset="utf-8", $suffix=true) {
 if(function_exists("mb_substr")) {
  return mb_substr($str, $start, $length, $charset);
 } elseif(function_exists(\'iconv_substr\')) {
  return iconv_substr($str,$start,$length,$charset);
 }
 $re[\'utf-8\'] = "/[\x01-\x7f]|[\xc2-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xff][\x80-\xbf]{3}/";
 $re[\'gb2312\'] = "/[\x01-\x7f]|[\xb0-\xf7][\xa0-\xfe]/";
 $re[\'gbk\'] = "/[\x01-\x7f]|[\x81-\xfe][\x40-\xfe]/";
 $re[\'big5\'] = "/[\x01-\x7f]|[\x81-\xfe]([\x40-\x7e]|\xa1-\xfe])/";
 preg_match_all($re[$charset], $str, $match);
 $slice = join("",array_slice($match[0], $start, $length));
 if($suffix) {
  return $slice."…";
 }
 return $slice;
}
 
/**
 * php 实现js escape 函数
 * @param [type] $string [description]
 * @param string $encoding [description]
 * @return [type]   [description]
 */
function escape($string, $encoding = \'UTF-8\'){
 $return = null;
 for ($x = 0; $x < mb_strlen($string, $encoding);$x ++)
 {
 $str = mb_substr($string, $x, 1, $encoding);
 if (strlen($str) > 1) { // 多字节字符
  $return .= "%u" . strtoupper(bin2hex(mb_convert_encoding($str, \'UCS-2\', $encoding)));
 } else {
  $return .= "%" . strtoupper(bin2hex($str));
 }
 }
 return $return;
}
/**
 * php 实现 js unescape函数
 * @param [type] $str [description]
 * @return [type]  [description]
 */
function unescape($str) {
 $str = rawurldecode($str);
 preg_match_all("/(?:%u.{4})|.{4};|&#\d+;|.+/U",$str,$r);
 $ar = $r[0];
 foreach($ar as $k=>$v) {
  if(substr($v,0,2) == "%u"){
   $ar[$k] = iconv("UCS-2","utf-8//IGNORE",pack("H4",substr($v,-4)));
  } elseif(substr($v,0,3) == "") {
   $ar[$k] = iconv("UCS-2","utf-8",pack("H4",substr($v,3,-1)));
  } elseif(substr($v,0,2) == "&#") {
   echo substr($v,2,-1)."";
   $ar[$k] = iconv("UCS-2","utf-8",pack("n",substr($v,2,-1)));
  }
 }
 return join("",$ar);
}
 
/**
 * 数字转人名币
 * @param [type] $num [description]
 * @return [type]  [description]
 */
function num2rmb ($num) {
 $c1 = "零壹贰叁肆伍陆柒捌玖";
 $c2 = "分角元拾佰仟万拾佰仟亿";
 $num = round($num, 2);
 $num = $num * 100;
 if (strlen($num) > 10) {
  return "oh,sorry,the number is too long!";
 }
 $i = 0;
 $c = "";
 while (1) {
  if ($i == 0) {
   $n = substr($num, strlen($num)-1, 1);
  } else {
   $n = $num % 10;
  }
  $p1 = substr($c1, 3 * $n, 3);
  $p2 = substr($c2, 3 * $i, 3);
  if ($n != \'0\' || ($n == \'0\' && ($p2 == \'亿\' || $p2 == \'万\' || $p2 == \'元\'))) {
   $c = $p1 . $p2 . $c;
  } else {
   $c = $p1 . $c;
  }
  $i = $i + 1;
  $num = $num / 10;
  $num = (int)$num;
  if ($num == 0) {
   break;
  }
 }
 $j = 0;
 $slen = strlen($c);
 while ($j < $slen) {
  $m = substr($c, $j, 6);
  if ($m == \'零元\' || $m == \'零万\' || $m == \'零亿\' || $m == \'零零\') {
   $left = substr($c, 0, $j);
   $right = substr($c, $j + 3);
   $c = $left . $right;
   $j = $j-3;
   $slen = $slen-3;
  }
  $j = $j + 3;
 }
 if (substr($c, strlen($c)-3, 3) == \'零\') {
  $c = substr($c, 0, strlen($c)-3);
 } // if there is a \'0\' on the end , chop it out
 return $c . "整";
}
 
/**
 * 特殊的字符
 * @param [type] $str [description]
 * @return [type]  [description]
 */
function makeSemiangle($str) {
 $arr = array(
  \'０\' => \'0\', \'１\' => \'1\', \'２\' => \'2\', \'３\' => \'3\', \'４\' => \'4\',
  \'５\' => \'5\', \'６\' => \'6\', \'７\' => \'7\', \'８\' => \'8\', \'９\' => \'9\',
  \'Ａ\' => \'A\', \'Ｂ\' => \'B\', \'Ｃ\' => \'C\', \'Ｄ\' => \'D\', \'Ｅ\' => \'E\',
  \'Ｆ\' => \'F\', \'Ｇ\' => \'G\', \'Ｈ\' => \'H\', \'Ｉ\' => \'I\', \'Ｊ\' => \'J\',
  \'Ｋ\' => \'K\', \'Ｌ\' => \'L\', \'Ｍ\' => \'M\', \'Ｎ\' => \'N\', \'Ｏ\' => \'O\',
  \'Ｐ\' => \'P\', \'Ｑ\' => \'Q\', \'Ｒ\' => \'R\', \'Ｓ\' => \'S\', \'Ｔ\' => \'T\',
  \'Ｕ\' => \'U\', \'Ｖ\' => \'V\', \'Ｗ\' => \'W\', \'Ｘ\' => \'X\', \'Ｙ\' => \'Y\',
  \'Ｚ\' => \'Z\', \'ａ\' => \'a\', \'ｂ\' => \'b\', \'ｃ\' => \'c\', \'ｄ\' => \'d\',
  \'ｅ\' => \'e\', \'ｆ\' => \'f\', \'ｇ\' => \'g\', \'ｈ\' => \'h\', \'ｉ\' => \'i\',
  \'ｊ\' => \'j\', \'ｋ\' => \'k\', \'ｌ\' => \'l\', \'ｍ\' => \'m\', \'ｎ\' => \'n\',
  \'ｏ\' => \'o\', \'ｐ\' => \'p\', \'ｑ\' => \'q\', \'ｒ\' => \'r\', \'ｓ\' => \'s\',
  \'ｔ\' => \'t\', \'ｕ\' => \'u\', \'ｖ\' => \'v\', \'ｗ\' => \'w\', \'ｘ\' => \'x\',
  \'ｙ\' => \'y\', \'ｚ\' => \'z\',
  \'（\' => \'(\', \'）\' => \')\', \'〔\' => \'[\', \'〕\' => \']\', \'【\' => \'[\',
  \'】\' => \']\', \'〖\' => \'[\', \'〗\' => \']\', \'｛\' => \'{\', \'｝\' => \'}\', \'《\' => \'<\',
  \'》\' => \'>\',
  \'％\' => \'%\', \'＋\' => \'+\', \'—\' => \'-\', \'－\' => \'-\', \'～\' => \'-\',
  \'：\' => \':\', \'。\' => \'.\', \'、\' => \',\', \'，\' => \'.\', \'、\' => \'.\',
  \'；\' => \';\', \'？\' => \'?\', \'！\' => \'!\', \'…\' => \'-\', \'‖\' => \'|\',
  \'”\' => \'"\', \'“\' => \'"\', \'\'\' => \'`\', \'‘\' => \'`\', \'｜\' => \'|\', \'〃\' => \'"\',
  \'　\' => \' \',\'．\' => \'.\');
 return strtr($str, $arr);
}
 
/**
 * 下载
 * @param [type] $filename [description]
 * @param string $dir  [description]
 * @return [type]   [description]
 */
function downloads($filename,$dir=\'./\'){
 $filepath = $dir.$filename;
 if (!file_exists($filepath)){
  header("Content-type: text/html; charset=utf-8");
  echo "File not found!";
  exit;
 } else {
  $file = fopen($filepath,"r");
  Header("Content-type: application/octet-stream");
  Header("Accept-Ranges: bytes");
  Header("Accept-Length: ".filesize($filepath));
  Header("Content-Disposition: attachment; filename=".$filename);
  echo fread($file, filesize($filepath));
  fclose($file);
 }
}
 
/**
 * 创建一个目录树
 * @param [type] $dir [description]
 * @param integer $mode [description]
 * @return [type]  [description]
 */
function mkdirs($dir, $mode = 0777) {
 if (!is_dir($dir)) {
  mkdirs(dirname($dir), $mode);
  return mkdir($dir, $mode);
 }
 return true;
}

 


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