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<?php
/**
* 助手类
* @author www.shouce.ren
*/
class Helper
{
/**
* 判断当前服务器系统
* @return string
*/
public static function getOS(){
if(PATH_SEPARATOR == ‘:‘){
return ‘Linux‘;
}else{
return ‘Windows‘;
}
}
/**
* 当前微妙数
* @return number
*/
public static function microtime_float() {
list ( $usec, $sec ) = explode ( " ", microtime () );
return (( float ) $usec + ( float ) $sec);
}
/**
* 切割utf-8格式的字符串(一个汉字或者字符占一个字节)
*
* @author zhao jinhan
* @version v1.0.0
*
*/
public static function truncate_utf8_string($string, $length, $etc = ‘...‘) {
$result = ‘‘;
$string = html_entity_decode ( trim ( strip_tags ( $string ) ), ENT_QUOTES, ‘UTF-8‘ );
$strlen = strlen ( $string );
for($i = 0; (($i < $strlen) && ($length > 0)); $i ++) {
if ($number = strpos ( str_pad ( decbin ( ord ( substr ( $string, $i, 1 ) ) ), 8, ‘0‘, STR_PAD_LEFT ), ‘0‘ )) {
if ($length < 1.0) {
break;
}
$result .= substr ( $string, $i, $number );
$length -= 1.0;
$i += $number - 1;
} else {
$result .= substr ( $string, $i, 1 );
$length -= 0.5;
}
}
$result = htmlspecialchars ( $result, ENT_QUOTES, ‘UTF-8‘ );
if ($i < $strlen) {
$result .= $etc;
}
return $result;
}
/**
* 遍历文件夹
* @param string $dir
* @param boolean $all true表示递归遍历
* @return array
*/
public static function scanfDir($dir=‘‘, $all = false, &$ret = array()){
if ( false !== ($handle = opendir ( $dir ))) {
while ( false !== ($file = readdir ( $handle )) ) {
if (!in_array($file, array(‘.‘, ‘..‘, ‘.git‘, ‘.gitignore‘, ‘.svn‘, ‘.htaccess‘, ‘.buildpath‘,‘.project‘))) {
$cur_path = $dir . ‘/‘ . $file;
if (is_dir ( $cur_path )) {
$ret[‘dirs‘][] =$cur_path;
$all && self::scanfDir( $cur_path, $all, $ret);
} else {
$ret [‘files‘] [] = $cur_path;
}
}
}
closedir ( $handle );
}
return $ret;
}
/**
* 邮件发送
* @param string $toemail
* @param string $subject
* @param string $message
* @return boolean
*/
public static function sendMail($toemail = ‘‘, $subject = ‘‘, $message = ‘‘) {
$mailer = Yii::createComponent ( ‘application.extensions.mailer.EMailer‘ );
//邮件配置
$mailer->SetLanguage(‘zh_cn‘);
$mailer->Host = Yii::app()->params[‘emailHost‘]; //发送邮件服务器
$mailer->Port = Yii::app()->params[‘emailPort‘]; //邮件端口
$mailer->Timeout = Yii::app()->params[‘emailTimeout‘];//邮件发送超时时间
$mailer->ContentType = ‘text/html‘;//设置html格式
$mailer->SMTPAuth = true;
$mailer->Username = Yii::app()->params[‘emailUserName‘];
$mailer->Password = Yii::app()->params[‘emailPassword‘];
$mailer->IsSMTP ();
$mailer->From = $mailer->Username; // 发件人邮箱
$mailer->FromName = Yii::app()->params[‘emailFormName‘]; // 发件人姓名
$mailer->AddReplyTo ( $mailer->Username );
$mailer->CharSet = ‘UTF-8‘;
// 添加邮件日志
$modelMail = new MailLog ();
$modelMail->accept = $toemail;
$modelMail->subject = $subject;
$modelMail->message = $message;
$modelMail->send_status = ‘waiting‘;
$modelMail->save ();
// 发送邮件
$mailer->AddAddress ( $toemail );
$mailer->Subject = $subject;
$mailer->Body = $message;
if ($mailer->Send () === true) {
$modelMail->times = $modelMail->times + 1;
$modelMail->send_status = ‘success‘;
$modelMail->save ();
return true;
} else {
$error = $mailer->ErrorInfo;
$modelMail->times = $modelMail->times + 1;
$modelMail->send_status = ‘failed‘;
$modelMail->error = $error;
$modelMail->save ();
return false;
}
}
/**
* 判断字符串是utf-8 还是gb2312
* @param unknown $str
* @param string $default
* @return string
*/
public static function utf8_gb2312($str, $default = ‘gb2312‘)
{
$str = preg_replace("/[\x01-\x7F]+/", "", $str);
if (empty($str)) return $default;
$preg = array(
"gb2312" => "/^([\xA1-\xF7][\xA0-\xFE])+$/", //正则判断是否是gb2312
"utf-8" => "/^[\x{4E00}-\x{9FA5}]+$/u", //正则判断是否是汉字(utf8编码的条件了)，这个范围实际上已经包含了繁体中文字了
);
if ($default == ‘gb2312‘) {
$option = ‘utf-8‘;
} else {
$option = ‘gb2312‘;
}
if (!preg_match($preg[$default], $str)) {
return $option;
}
$str = @iconv($default, $option, $str);
//不能转成 $option, 说明原来的不是 $default
if (empty($str)) {
return $option;
}
return $default;
}
/**
* utf-8和gb2312自动转化
* @param unknown $string
* @param string $outEncoding
* @return unknown|string
*/
public static function safeEncoding($string,$outEncoding = ‘UTF-8‘)
{
$encoding = "UTF-8";
for($i = 0; $i < strlen ( $string ); $i ++) {
if (ord ( $string {$i} ) < 128)
continue;
if ((ord ( $string {$i} ) & 224) == 224) {
// 第一个字节判断通过
$char = $string {++ $i};
if ((ord ( $char ) & 128) == 128) {
// 第二个字节判断通过
$char = $string {++ $i};
if ((ord ( $char ) & 128) == 128) {
$encoding = "UTF-8";
break;
}
}
}
if ((ord ( $string {$i} ) & 192) == 192) {
// 第一个字节判断通过
$char = $string {++ $i};
if ((ord ( $char ) & 128) == 128) {
// 第二个字节判断通过
$encoding = "GB2312";
break;
}
}
}
if (strtoupper ( $encoding ) == strtoupper ( $outEncoding ))
return $string;
else
return @iconv ( $encoding, $outEncoding, $string );
}
/**
* 返回二维数组中某个键名的所有值
* @param input $array
* @param string $key
* @return array
*/
public static function array_key_values($array =array(), $key=‘‘)
{
$ret = array();
foreach((array)$array as $k=>$v){
$ret[$k] = $v[$key];
}
return $ret;
}
/**
* 判断 文件/目录 是否可写（取代系统自带的 is_writeable 函数）
* @param string $file 文件/目录
* @return boolean
*/
public static function is_writeable($file) {
if (is_dir($file)){
$dir = $file;
if ($fp = @fopen("$dir/test.txt", ‘w‘)) {
@fclose($fp);
@unlink("$dir/test.txt");
$writeable = 1;
} else {
$writeable = 0;
}
} else {
if ($fp = @fopen($file, ‘a+‘)) {
@fclose($fp);
$writeable = 1;
} else {
$writeable = 0;
}
}
return $writeable;
}
/**
* 格式化单位
*/
static public function byteFormat( $size, $dec = 2 ) {
$a = array ( "B" , "KB" , "MB" , "GB" , "TB" , "PB" );
$pos = 0;
while ( $size >= 1024 ) {
$size /= 1024;
$pos ++;
}
return round( $size, $dec ) . " " . $a[$pos];
}
/**
* 下拉框，单选按钮 自动选择
*
* @param $string 输入字符
* @param $param 条件
* @param $type 类型
* selected checked
* @return string
*/
static public function selected( $string, $param = 1, $type = ‘select‘ ) {
$true = false;
if ( is_array( $param ) ) {
$true = in_array( $string, $param );
}elseif ( $string == $param ) {
$true = true;
}
$return=‘‘;
if ( $true )
$return = $type == ‘select‘ ? ‘selected="selected"‘ : ‘checked="checked"‘;
echo $return;
}
/**
* 下载远程图片
* @param string $url 图片的绝对url
* @param string $filepath 文件的完整路径（例如/www/images/test） ，此函数会自动根据图片url和http头信息确定图片的后缀名
* @param string $filename 要保存的文件名(不含扩展名)
* @return mixed 下载成功返回一个描述图片信息的数组，下载失败则返回false
*/
static public function downloadImage($url, $filepath, $filename) {
//服务器返回的头信息
$responseHeaders = array();
//原始图片名
$originalfilename = ‘‘;
//图片的后缀名
$ext = ‘‘;
$ch = curl_init($url);
//设置curl_exec返回的值包含Http头
curl_setopt($ch, CURLOPT_HEADER, 1);
//设置curl_exec返回的值包含Http内容
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
//设置抓取跳转（http 301，302）后的页面
curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
//设置最多的HTTP重定向的数量
curl_setopt($ch, CURLOPT_MAXREDIRS, 3);
//服务器返回的数据（包括http头信息和内容）
$html = curl_exec($ch);
//获取此次抓取的相关信息
$httpinfo = curl_getinfo($ch);
curl_close($ch);
if ($html !== false) {
//分离response的header和body，由于服务器可能使用了302跳转，所以此处需要将字符串分离为 2+跳转次数 个子串
$httpArr = explode("\r\n\r\n", $html, 2 + $httpinfo[‘redirect_count‘]);
//倒数第二段是服务器最后一次response的http头
$header = $httpArr[count($httpArr) - 2];
//倒数第一段是服务器最后一次response的内容
$body = $httpArr[count($httpArr) - 1];
$header.="\r\n";
//获取最后一次response的header信息
preg_match_all(‘/([a-z0-9-_]+):\s*([^\r\n]+)\r\n/i‘, $header, $matches);
if (!empty($matches) && count($matches) == 3 && !empty($matches[1]) && !empty($matches[1])) {
for ($i = 0; $i < count($matches[1]); $i++) {
if (array_key_exists($i, $matches[2])) {
$responseHeaders[$matches[1][$i]] = $matches[2][$i];
}
}
}
//获取图片后缀名
if (0 < preg_match(‘{(?:[^\/\\\\]+)\.(jpg|jpeg|gif|png|bmp)$}i‘, $url, $matches)) {
$originalfilename = $matches[0];
$ext = $matches[1];
} else {
if (array_key_exists(‘Content-Type‘, $responseHeaders)) {
if (0 < preg_match(‘{image/(\w+)}i‘, $responseHeaders[‘Content-Type‘], $extmatches)) {
$ext = $extmatches[1];
}
}
}
//保存文件
if (!empty($ext)) {
//如果目录不存在，则先要创建目录
if(!is_dir($filepath)){
mkdir($filepath, 0777, true);
}
$filepath .= ‘/‘.$filename.".$ext";
$local_file = fopen($filepath, ‘w‘);
if (false !== $local_file) {
if (false !== fwrite($local_file, $body)) {
fclose($local_file);
$sizeinfo = getimagesize($filepath);
return array(‘filepath‘ => realpath($filepath), ‘width‘ => $sizeinfo[0], ‘height‘ => $sizeinfo[1], ‘orginalfilename‘ => $originalfilename, ‘filename‘ => pathinfo($filepath, PATHINFO_BASENAME));
}
}
}
}
return false;
}
/**
* 查找ip是否在某个段位里面
* @param string $ip 要查询的ip
* @param $arrIP 禁止的ip
* @return boolean
*/
public static function ipAccess($ip=‘0.0.0.0‘, $arrIP = array()){
$access = true;
$ip && $arr_cur_ip = explode(‘.‘, $ip);
foreach((array)$arrIP as $key=> $value){
if($value == ‘*.*.*.*‘){
$access = false; //禁止所有
break;
}
$tmp_arr = explode(‘.‘, $value);
if(($arr_cur_ip[0] == $tmp_arr[0]) && ($arr_cur_ip[1] == $tmp_arr[1])) {
//前两段相同
if(($arr_cur_ip[2] == $tmp_arr[2]) || ($tmp_arr[2] == ‘*‘)){
//第三段为* 或者相同
if(($arr_cur_ip[3] == $tmp_arr[3]) || ($tmp_arr[3] == ‘*‘)){
//第四段为* 或者相同
$access = false; //在禁止ip列，则禁止访问
break;
}
}
}
}
return $access;
}
/**
* @param string $string 原文或者密文
* @param string $operation 操作(ENCODE | DECODE), 默认为 DECODE
* @param string $key 密钥
* @param int $expiry 密文有效期, 加密时候有效， 单位 秒，0 为永久有效
* @return string 处理后的 原文或者 经过 base64_encode 处理后的密文
*
* @example
*
* $a = authcode(‘abc‘, ‘ENCODE‘, ‘key‘);
* $b = authcode($a, ‘DECODE‘, ‘key‘); // $b(abc)
*
* $a = authcode(‘abc‘, ‘ENCODE‘, ‘key‘, 3600);
* $b = authcode(‘abc‘, ‘DECODE‘, ‘key‘); // 在一个小时内，$b(abc)，否则 $b 为空
*/
public static function authcode($string, $operation = ‘DECODE‘, $key = ‘‘, $expiry = 3600) {
$ckey_length = 4;
// 随机密钥长度 取值 0-32;
// 加入随机密钥，可以令密文无任何规律，即便是原文和密钥完全相同，加密结果也会每次不同，增大破解难度。
// 取值越大，密文变动规律越大，密文变化 = 16 的 $ckey_length 次方
// 当此值为 0 时，则不产生随机密钥
$key = md5 ( $key ? $key : ‘key‘ ); //这里可以填写默认key值
$keya = md5 ( substr ( $key, 0, 16 ) );
$keyb = md5 ( substr ( $key, 16, 16 ) );
$keyc = $ckey_length ? ($operation == ‘DECODE‘ ? substr ( $string, 0, $ckey_length ) : substr ( md5 ( microtime () ), - $ckey_length )) : ‘‘;
$cryptkey = $keya . md5 ( $keya . $keyc );
$key_length = strlen ( $cryptkey );
$string = $operation == ‘DECODE‘ ? base64_decode ( substr ( $string, $ckey_length ) ) : sprintf ( ‘%010d‘, $expiry ? $expiry + time () : 0 ) . substr ( md5 ( $string . $keyb ), 0, 16 ) . $string;
$string_length = strlen ( $string );
$result = ‘‘;
$box = range ( 0, 255 );
$rndkey = array ();
for($i = 0; $i <= 255; $i ++) {
$rndkey [$i] = ord ( $cryptkey [$i % $key_length] );
}
for($j = $i = 0; $i < 256; $i ++) {
$j = ($j + $box [$i] + $rndkey [$i]) % 256;
$tmp = $box [$i];
$box [$i] = $box [$j];
$box [$j] = $tmp;
}
for($a = $j = $i = 0; $i < $string_length; $i ++) {
$a = ($a + 1) % 256;
$j = ($j + $box [$a]) % 256;
$tmp = $box [$a];
$box [$a] = $box [$j];
$box [$j] = $tmp;
$result .= chr ( ord ( $string [$i] ) ^ ($box [($box [$a] + $box [$j]) % 256]) );
}
if ($operation == ‘DECODE‘) {
if ((substr ( $result, 0, 10 ) == 0 || substr ( $result, 0, 10 ) - time () > 0) && substr ( $result, 10, 16 ) == substr ( md5 ( substr ( $result, 26 ) . $keyb ), 0, 16 )) {
return substr ( $result, 26 );
} else {
return ‘‘;
}
} else {
return $keyc . str_replace ( ‘=‘, ‘‘, base64_encode ( $result ) );
}
}
public static function gbkToUtf8($str){
return iconv("GBK", "UTF-8", $str);
}
/**
* 取得输入目录所包含的所有目录和文件
* 以关联数组形式返回
* author: flynetcn
*/
static public function deepScanDir($dir)
{
$fileArr = array();
$dirArr = array();
$dir = rtrim($dir, ‘//‘);
if(is_dir($dir)){
$dirHandle = opendir($dir);
while(false !== ($fileName = readdir($dirHandle))){
$subFile = $dir . DIRECTORY_SEPARATOR . $fileName;
if(is_file($subFile)){
$fileArr[] = $subFile;
} elseif (is_dir($subFile) && str_replace(‘.‘, ‘‘, $fileName)!=‘‘){
$dirArr[] = $subFile;
$arr = self::deepScanDir($subFile);
$dirArr = array_merge($dirArr, $arr[‘dir‘]);
$fileArr = array_merge($fileArr, $arr[‘file‘]);
}
}
closedir($dirHandle);
}
return array(‘dir‘=>$dirArr, ‘file‘=>$fileArr);
}
/**
* 取得输入目录所包含的所有文件
* 以数组形式返回
* author: flynetcn
*/
static public function get_dir_files($dir)
{
if (is_file($dir)) {
return array($dir);
}
$files = array();
if (is_dir($dir) && ($dir_p = opendir($dir))) {
$ds = DIRECTORY_SEPARATOR;
while (($filename = readdir($dir_p)) !== false) {
if ($filename==‘.‘ || $filename==‘..‘) { continue; }
$filetype = filetype($dir.$ds.$filename);
if ($filetype == ‘dir‘) {
$files = array_merge($files, self::get_dir_files($dir.$ds.$filename));
} elseif ($filetype == ‘file‘) {
$files[] = $dir.$ds.$filename;
}
}
closedir($dir_p);
}
return $files;
}
/**
* 删除文件夹及其文件夹下所有文件
*/
public static function deldir($dir) {
//先删除目录下的文件：
$dh=opendir($dir);
while ($file=readdir($dh)) {
if($file!="." && $file!="..") {
$fullpath=$dir."/".$file;
if(!is_dir($fullpath)) {
unlink($fullpath);
} else {
self::deldir($fullpath);
}
}
}
closedir($dh);
//删除当前文件夹：
if(rmdir($dir)) {
return true;
} else {
return false;
}
}
/**
* js 弹窗并且跳转
* @param string $_info
* @param string $_url
* @return js
*/
static public function alertLocation($_info, $_url) {
echo "<script type=‘text/javascript‘>alert(‘$_info‘);location.href=‘$_url‘;</script>";
exit();
}
/**
* js 弹窗返回
* @param string $_info
* @return js
*/
static public function alertBack($_info) {
echo "<script type=‘text/javascript‘>alert(‘$_info‘);history.back();</script>";
exit();
}
/**
* 页面跳转
* @param string $url
* @return js
*/
static public function headerUrl($url) {
echo "<script type=‘text/javascript‘>location.href=‘{$url}‘;</script>";
exit();
}
/**
* 弹窗关闭
* @param string $_info
* @return js
*/
static public function alertClose($_info) {
echo "<script type=‘text/javascript‘>alert(‘$_info‘);close();</script>";
exit();
}
/**
* 弹窗
* @param string $_info
* @return js
*/
static public function alert($_info) {
echo "<script type=‘text/javascript‘>alert(‘$_info‘);</script>";
exit();
}
/**
* 系统基本参数上传图片专用
* @param string $_path
* @return null
*/
static public function sysUploadImg($_path) {
echo ‘<script type="text/javascript">document.getElementById("logo").value="‘.$_path.‘";</script>‘;
echo ‘<script type="text/javascript">document.getElementById("pic").src="‘.$_path.‘";</script>‘;
echo ‘<script type="text/javascript">$("#loginpop1").hide();</script>‘;
echo ‘<script type="text/javascript">$("#bgloginpop2").hide();</script>‘;
}
/**
* html过滤
* @param array|object $_date
* @return string
*/
static public function htmlString($_date) {
if (is_array($_date)) {
foreach ($_date as $_key=>$_value) {
$_string[$_key] = self::htmlString($_value); //递归
}
} elseif (is_object($_date)) {
foreach ($_date as $_key=>$_value) {
$_string->$_key = self::htmlString($_value); //递归
}
} else {
$_string = htmlspecialchars($_date);
}
return $_string;
}
/**
* 数据库输入过滤
* @param string $_data
* @return string
*/
static public function mysqlString($_data) {
$_data = trim($_data);
return !GPC ? addcslashes($_data) : $_data;
}
/**
* 清理session
*/
static public function unSession() {
if (session_start()) {
session_destroy();
}
}
/**
* 验证是否为空
* @param string $str
* @param string $name
* @return bool (true or false)
*/
static function validateEmpty($str, $name) {
if (empty($str)) {
self::alertBack(‘警告：‘ .$name . ‘不能为空！‘);
}
}
/**
* 验证是否相同
* @param string $str1
* @param string $str2
* @param string $alert
* @return JS
*/
static function validateAll($str1, $str2, $alert) {
if ($str1 != $str2) self::alertBack(‘警告：‘ .$alert);
}
/**
* 验证ID
* @param Number $id
* @return JS
*/
static function validateId($id) {
if (empty($id) || !is_numeric($id)) self::alertBack(‘警告：参数错误！‘);
}
/**
* 格式化字符串
* @param string $str
* @return string
*/
static public function formatStr($str) {
$arr = array(‘ ‘, ‘ ‘, ‘&‘, ‘@‘, ‘#‘, ‘%‘, ‘\‘‘, ‘"‘, ‘\\‘, ‘/‘, ‘.‘, ‘,‘, ‘$‘, ‘^‘, ‘*‘, ‘(‘, ‘)‘, ‘[‘, ‘]‘, ‘{‘, ‘}‘, ‘|‘, ‘~‘, ‘`‘, ‘?‘, ‘!‘, ‘;‘, ‘:‘, ‘-‘, ‘_‘, ‘+‘, ‘=‘);
foreach ($arr as $v) {
$str = str_replace($v, ‘‘, $str);
}
return $str;
}
/**
* 格式化时间
* @param int $time 时间戳
* @return string
*/
static public function formatDate($time=‘default‘) {
$date = $time == ‘default‘ ? date(‘Y-m-d H:i:s‘, time()) : date(‘Y-m-d H:i:s‘, $time);
return $date;
}
/**
* 获得真实IP地址
* @return string
*/
static public function realIp() {
static $realip = NULL;
if ($realip !== NULL) return $realip;
if (isset($_SERVER)) {
if (isset($_SERVER[‘HTTP_X_FORWARDED_FOR‘])) {
$arr = explode(‘,‘, $_SERVER[‘HTTP_X_FORWARDED_FOR‘]);
foreach ($arr AS $ip) {
$ip = trim($ip);
if ($ip != ‘unknown‘) {
$realip = $ip;
break;
}
}
} elseif (isset($_SERVER[‘HTTP_CLIENT_IP‘])) {
$realip = $_SERVER[‘HTTP_CLIENT_IP‘];
} else {
if (isset($_SERVER[‘REMOTE_ADDR‘])) {
$realip = $_SERVER[‘REMOTE_ADDR‘];
} else {
$realip = ‘0.0.0.0‘;
}
}
} else {
if (getenv(‘HTTP_X_FORWARDED_FOR‘)) {
$realip = getenv(‘HTTP_X_FORWARDED_FOR‘);
} elseif (getenv(‘HTTP_CLIENT_IP‘)) {
$realip = getenv(‘HTTP_CLIENT_IP‘);
} else {
$realip = getenv(‘REMOTE_ADDR‘);
}
}
preg_match(‘/[\d\.]{7,15}/‘, $realip, $onlineip);
$realip = !empty($onlineip[0]) ? $onlineip[0] : ‘0.0.0.0‘;
return $realip;
}
/**
* 加载 Smarty 模板
* @param string $html
* @return null;
*/
static public function display() {
global $tpl;$html = null;
$htmlArr = explode(‘/‘, $_SERVER[SCRIPT_NAME]);
$html = str_ireplace(‘.php‘, ‘.html‘, $htmlArr[count($htmlArr)-1]);
$dir = dirname($_SERVER[SCRIPT_NAME]);
$firstStr = substr($dir, 0, 1);
$endStr = substr($dir, strlen($dir)-1, 1);
if ($firstStr == ‘/‘ || $firstStr == ‘\\‘) $dir = substr($dir, 1);
if ($endStr != ‘/‘ || $endStr != ‘\\‘) $dir = $dir . ‘/‘;
$tpl->display($dir.$html);
}
/**
* 创建目录
* @param string $dir
*/
static public function createDir($dir) {
if (!is_dir($dir)) {
mkdir($dir, 0777);
}
}
/**
* 创建文件（默认为空）
* @param unknown_type $filename
*/
static public function createFile($filename) {
if (!is_file($filename)) touch($filename);
}
/**
* 正确获取变量
* @param string $param
* @param string $type
* @return string
*/
static public function getData($param, $type=‘post‘) {
$type = strtolower($type);
if ($type==‘post‘) {
return self::mysqlString(trim($_POST[$param]));
} elseif ($type==‘get‘) {
return self::mysqlString(trim($_GET[$param]));
}
}
/**
* 删除文件
* @param string $filename
*/
static public function delFile($filename) {
if (file_exists($filename)) unlink($filename);
}
/**
* 删除目录
* @param string $path
*/
static public function delDir($path) {
if (is_dir($path)) rmdir($path);
}
/**
* 删除目录及地下的全部文件
* @param string $dir
* @return bool
*/
static public function delDirOfAll($dir) {
//先删除目录下的文件：
if (is_dir($dir)) {
$dh=opendir($dir);
while (!!$file=readdir($dh)) {
if($file!="." && $file!="..") {
$fullpath=$dir."/".$file;
if(!is_dir($fullpath)) {
unlink($fullpath);
} else {
self::delDirOfAll($fullpath);
}
}
}
closedir($dh);
//删除当前文件夹：
if(rmdir($dir)) {
return true;
} else {
return false;
}
}
}
/**
* 验证登陆
*/
static public function validateLogin() {
if (empty($_SESSION[‘admin‘][‘user‘])) header(‘Location:/admin/‘);
}
/**
* 给已经存在的图片添加水印
* @param string $file_path
* @return bool
*/
static public function addMark($file_path) {
if (file_exists($file_path) && file_exists(MARK)) {
//求出上传图片的名称后缀
$ext_name = strtolower(substr($file_path, strrpos($file_path, ‘.‘), strlen($file_path)));
//$new_name=‘jzy_‘ . time() . rand(1000,9999) . $ext_name ;
$store_path = ROOT_PATH . UPDIR;
//求上传图片高宽
$imginfo = getimagesize($file_path);
$width = $imginfo[0];
$height = $imginfo[1];
//添加图片水印
switch($ext_name) {
case ‘.gif‘:
$dst_im = imagecreatefromgif($file_path);
break;
case ‘.jpg‘:
$dst_im = imagecreatefromjpeg($file_path);
break;
case ‘.png‘:
$dst_im = imagecreatefrompng($file_path);
break;
}
$src_im = imagecreatefrompng(MARK);
//求水印图片高宽
$src_imginfo = getimagesize(MARK);
$src_width = $src_imginfo[0];
$src_height = $src_imginfo[1];
//求出水印图片的实际生成位置
$src_x = $width - $src_width - 10;
$src_y = $height - $src_height - 10;
//新建一个真彩色图像
$nimage = imagecreatetruecolor($width, $height);
//拷贝上传图片到真彩图像
imagecopy($nimage, $dst_im, 0, 0, 0, 0, $width, $height);
//按坐标位置拷贝水印图片到真彩图像上
imagecopy($nimage, $src_im, $src_x, $src_y, 0, 0, $src_width, $src_height);
//分情况输出生成后的水印图片
switch($ext_name) {
case ‘.gif‘:
imagegif($nimage, $file_path);
break;
case ‘.jpg‘:
imagejpeg($nimage, $file_path);
break;
case ‘.png‘:
imagepng($nimage, $file_path);
break;
}
//释放资源
imagedestroy($dst_im);
imagedestroy($src_im);
unset($imginfo);
unset($src_imginfo);
//移动生成后的图片
@move_uploaded_file($file_path, ROOT_PATH.UPDIR . $file_path);
}
}
/**
* 中文截取2，单字节截取模式
* @access public
* @param string $str 需要截取的字符串
* @param int $slen 截取的长度
* @param int $startdd 开始标记处
* @return string
*/
static public function cn_substr($str, $slen, $startdd=0){
$cfg_soft_lang = PAGECHARSET;
if($cfg_soft_lang==‘utf-8‘) {
return self::cn_substr_utf8($str, $slen, $startdd);
}
$restr = ‘‘;
$c = ‘‘;
$str_len = strlen($str);
if($str_len < $startdd+1) {
return ‘‘;
}
if($str_len < $startdd + $slen || $slen==0) {
$slen = $str_len - $startdd;
}
$enddd = $startdd + $slen - 1;
for($i=0;$i<$str_len;$i++) {
if($startdd==0) {
$restr .= $c;
} elseif($i > $startdd) {
$restr .= $c;
}
if(ord($str[$i])>0x80) {
if($str_len>$i+1) {
$c = $str[$i].$str[$i+1];
}
$i++;
} else {
$c = $str[$i];
}
if($i >= $enddd) {
if(strlen($restr)+strlen($c)>$slen) {
break;
} else {
$restr .= $c;
break;
}
}
}
return $restr;
}
/**
* utf-8中文截取，单字节截取模式
*
* @access public
* @param string $str 需要截取的字符串
* @param int $slen 截取的长度
* @param int $startdd 开始标记处
* @return string
*/
static public function cn_substr_utf8($str, $length, $start=0) {
if(strlen($str) < $start+1) {
return ‘‘;
}
preg_match_all("/./su", $str, $ar);
$str = ‘‘;
$tstr = ‘‘;
//为了兼容mysql4.1以下版本,与数据库varchar一致,这里使用按字节截取
for($i=0; isset($ar[0][$i]); $i++) {
if(strlen($tstr) < $start) {
$tstr .= $ar[0][$i];
} else {
if(strlen($str) < $length + strlen($ar[0][$i]) ) {
$str .= $ar[0][$i];
} else {
break;
}
}
}
return $str;
}
/**
* 删除图片，根据图片ID
* @param int $image_id
*/
static function delPicByImageId($image_id) {
$db_name = PREFIX . ‘images i‘;
$m = new Model();
$data = $m->getOne($db_name, "i.id={$image_id}", "i.path as p, i.big_img as b, i.small_img as s");
foreach ($data as $v) {
@self::delFile(ROOT_PATH . $v[‘p‘]);
@self::delFile(ROOT_PATH . $v[‘b‘]);
@self::delFile(ROOT_PATH . $v[‘s‘]);
}
$m->del(PREFIX . ‘images‘, "id={$image_id}");
unset($m);
}
/**
* 图片等比例缩放
* @param resource $im 新建图片资源(imagecreatefromjpeg/imagecreatefrompng/imagecreatefromgif)
* @param int $maxwidth 生成图像宽
* @param int $maxheight 生成图像高
* @param string $name 生成图像名称
* @param string $filetype文件类型(.jpg/.gif/.png)
*/
static public function resizeImage($im, $maxwidth, $maxheight, $name, $filetype) {
$pic_width = imagesx($im);
$pic_height = imagesy($im);
if(($maxwidth && $pic_width > $maxwidth) || ($maxheight && $pic_height > $maxheight)) {
if($maxwidth && $pic_width>$maxwidth) {
$widthratio = $maxwidth/$pic_width;
$resizewidth_tag = true;
}
if($maxheight && $pic_height>$maxheight) {
$heightratio = $maxheight/$pic_height;
$resizeheight_tag = true;
}
if($resizewidth_tag && $resizeheight_tag) {
if($widthratio<$heightratio)
$ratio = $widthratio;
else
$ratio = $heightratio;
}
if($resizewidth_tag && !$resizeheight_tag)
$ratio = $widthratio;
if($resizeheight_tag && !$resizewidth_tag)
$ratio = $heightratio;
$newwidth = $pic_width * $ratio;
$newheight = $pic_height * $ratio;
if(function_exists("imagecopyresampled")) {
$newim = imagecreatetruecolor($newwidth,$newheight);
imagecopyresampled($newim,$im,0,0,0,0,$newwidth,$newheight,$pic_width,$pic_height);
} else {
$newim = imagecreate($newwidth,$newheight);
imagecopyresized($newim,$im,0,0,0,0,$newwidth,$newheight,$pic_width,$pic_height);
}
$name = $name.$filetype;
imagejpeg($newim,$name);
imagedestroy($newim);
} else {
$name = $name.$filetype;
imagejpeg($im,$name);
}
}
/**
* 下载文件
* @param string $file_path 绝对路径
*/
static public function downFile($file_path) {
//判断文件是否存在
$file_path = iconv(‘utf-8‘, ‘gb2312‘, $file_path); //对可能出现的中文名称进行转码
if (!file_exists($file_path)) {
exit(‘文件不存在！‘);
}
$file_name = basename($file_path); //获取文件名称
$file_size = filesize($file_path); //获取文件大小
$fp = fopen($file_path, ‘r‘); //以只读的方式打开文件
header("Content-type: application/octet-stream");
header("Accept-Ranges: bytes");
header("Accept-Length: {$file_size}");
header("Content-Disposition: attachment;filename={$file_name}");
$buffer = 1024;
$file_count = 0;
//判断文件是否结束
while (!feof($fp) && ($file_size-$file_count>0)) {
$file_data = fread($fp, $buffer);
$file_count += $buffer;
echo $file_data;
}
fclose($fp); //关闭文件
}
}
下载地址 http://www.shouce.ren/post/view/id/1700
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原文地址：http://www.cnblogs.com/shouce/p/4979498.html
