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256 lines
7.1 KiB
256 lines
7.1 KiB
<?php
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/**
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* 常用工具库
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*/
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namespace libraries;
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class Util {
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/**
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* HTML代码过滤
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* @param string $str 字符串
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* @return string
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*/
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public static function escapeHtml($str){
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$search = array ("'<script[^>]*?>.*?</script>'si", // 去掉 javascript
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"'<iframe[^>]*?>.*?</iframe>'si", // 去掉iframe
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);
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$replace = array ("",
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"",
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);
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$str = preg_replace ($search, $replace, $str);
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$str = htmlspecialchars($str, ENT_QUOTES, 'UTF-8');
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return $str;
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}
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/**
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* 获取来访IP
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* @return string
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*/
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public static function getIp(){
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if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))
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$ip = getenv("HTTP_CLIENT_IP");
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else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown"))
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$ip = getenv("HTTP_X_FORWARDED_FOR");
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else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))
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$ip = getenv("REMOTE_ADDR");
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else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))
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$ip = $_SERVER['REMOTE_ADDR'];
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else
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$ip = "unknown";
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return $ip;
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}
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/**
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* 中英文字符串截取
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* @param string $str 字符串
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* @param integer $start 起始长度
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* @param integer $length 截取长度
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* @param string $charset 字符编码
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* @param boolean $suffix 截取后缀
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* @return string
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*/
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public static function msubstr($str, $start = 0, $length, $charset="utf-8", $suffix = true){
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if($charset!='utf-8'){
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$str = mb_convert_encoding($str,'utf8',$charset);
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}
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$osLen = mb_strlen($str);
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if($osLen <= $length){
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return $str;
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}
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$string = mb_substr($str,$start,$length,'utf8');
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$sLen = mb_strlen($string,'utf8');
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$bLen = strlen($string);
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$sCharCount = (3*$sLen-$bLen)/2;
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if($osLen<=$sCharCount+$length){
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$arr = preg_split('/(?<!^)(?!$)/u',mb_substr($str,$length+1,$osLen,'utf8')); //将中英混合字符串分割成数组（UTF8下有效）
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}else {
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$arr = preg_split('/(?<!^)(?!$)/u',mb_substr($str,$length+1,$sCharCount,'utf8'));
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}
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foreach($arr as $value){
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if(ord($value)<128 && ord($value)>0){
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$sCharCount = $sCharCount-1;
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}else {
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$sCharCount = $sCharCount-2;
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}
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if($sCharCount<=0){
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break;
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}
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$string.=$value;
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}
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return $string;
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if($suffix) return $string."…";
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return $string;
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}
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/**
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* 判断UTF-8
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* @param string $string 字符串
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* @return boolean
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*/
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public static function isUtf8($string){
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if( !empty($string) ) {
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$ret = json_encode( array('code'=>$string) );
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if( $ret=='{"code":null}') {
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return false;
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}
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}
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return true;
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}
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/**
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* 字符串转码
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* @param string $fContents 字符串
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* @param string $from 原始编码
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* @param string $to 目标编码
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* @return string
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*/
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public static function auto_charset($fContents,$from='gbk',$to='utf-8'){
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$from = strtoupper($from)=='UTF8'? 'utf-8':$from;
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$to = strtoupper($to)=='UTF8'? 'utf-8':$to;
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if( strtoupper($from) === strtoupper($to) || empty($fContents) || (is_scalar($fContents) && !is_string($fContents)) ){
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//如果编码相同或者非字符串标量则不转换
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return $fContents;
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}
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if(is_string($fContents) ) {
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if(function_exists('mb_convert_encoding')){
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return mb_convert_encoding ($fContents, $to, $from);
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}elseif(function_exists('iconv')){
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return iconv($from,$to,$fContents);
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}else{
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return $fContents;
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}
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}
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elseif(is_array($fContents)){
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foreach ( $fContents as $key => $val ) {
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$_key = self::auto_charset($key,$from,$to);
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$fContents[$_key] = self::auto_charset($val,$from,$to);
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if($key != $_key )
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unset($fContents[$key]);
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}
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return $fContents;
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}
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else{
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return $fContents;
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}
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}
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/**
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* 加密函数
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* @param mixed $data 加密数据
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* @param string $key 密匙
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* @param integer $expire 失效时间
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* @return string
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*/
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public static function cpEncode($data, $key='', $expire = 0){
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$string=serialize($data);
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$ckey_length = 4;
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$key = md5($key);
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$keya = md5(substr($key, 0, 16));
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$keyb = md5(substr($key, 16, 16));
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$keyc = substr(md5(microtime()), -$ckey_length);
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$cryptkey = $keya.md5($keya.$keyc);
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$key_length = strlen($cryptkey);
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$string = sprintf('%010d', $expire ? $expire + time() : 0).substr(md5($string.$keyb), 0, 16).$string;
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$string_length = strlen($string);
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$result = '';
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$box = range(0, 255);
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$rndkey = array();
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for($i = 0; $i <= 255; $i++) {
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$rndkey[$i] = ord($cryptkey[$i % $key_length]);
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}
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for($j = $i = 0; $i < 256; $i++) {
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$j = ($j + $box[$i] + $rndkey[$i]) % 256;
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$tmp = $box[$i];
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$box[$i] = $box[$j];
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$box[$j] = $tmp;
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}
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for($a = $j = $i = 0; $i < $string_length; $i++) {
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$a = ($a + 1) % 256;
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$j = ($j + $box[$a]) % 256;
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$tmp = $box[$a];
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$box[$a] = $box[$j];
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$box[$j] = $tmp;
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$result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
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}
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return $keyc.str_replace('=', '', base64_encode($result));
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}
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/**
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* 解密函数
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* @param string $string 加密字符串
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* @param string $key 密匙
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* @return mixed
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*/
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public static function cpDecode($string,$key=''){
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$ckey_length = 4;
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$key = md5($key);
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$keya = md5(substr($key, 0, 16));
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$keyb = md5(substr($key, 16, 16));
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$keyc = substr($string, 0, $ckey_length);
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$cryptkey = $keya.md5($keya.$keyc);
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$key_length = strlen($cryptkey);
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$string = base64_decode(substr($string, $ckey_length));
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$string_length = strlen($string);
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$result = '';
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$box = range(0, 255);
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$rndkey = array();
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for($i = 0; $i <= 255; $i++) {
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$rndkey[$i] = ord($cryptkey[$i % $key_length]);
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}
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for($j = $i = 0; $i < 256; $i++) {
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$j = ($j + $box[$i] + $rndkey[$i]) % 256;
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$tmp = $box[$i];
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$box[$i] = $box[$j];
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$box[$j] = $tmp;
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}
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for($a = $j = $i = 0; $i < $string_length; $i++) {
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$a = ($a + 1) % 256;
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$j = ($j + $box[$a]) % 256;
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$tmp = $box[$a];
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$box[$a] = $box[$j];
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$box[$j] = $tmp;
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$result .= chr(ord($string[$i]) ^ ($box[($box[$a] + $box[$j]) % 256]));
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}
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if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$keyb), 0, 16)) {
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return unserialize(substr($result, 26));
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}else{
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return '';
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}
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}
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/**
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* 删除目录所有文件
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* @param string $dir 路径
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* @return boolean
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*/
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public static function delDir($dir){
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if (!is_dir($dir)){
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return false;
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}
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$handle = opendir($dir);
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while (($file = readdir($handle)) !== false){
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if ($file != "." && $file != ".."){
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is_dir("$dir/$file")? self::delDir("$dir/$file") : @unlink("$dir/$file");
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}
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}
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if (readdir($handle) == false){
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closedir($handle);
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@rmdir($dir);
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}
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}
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}
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