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php经常用到的数据过滤的方法

原作者: [db:作者] 来自: [db:来源] 收藏 邀请 
<?php
/**
 *  global.func.php 公共函数库
 */

/**
 * 返回经addslashes处理过的字符串或数组
 * @param $string 需要处理的字符串或数组
 * @return mixed
 */
function new_addslashes($string){
    if(!is_array($string)) return addslashes($string);
    foreach($string as $key => $val) $string[$key] = new_addslashes($val);
    return $string;
}

/**
 * 返回经stripslashes处理过的字符串或数组
 * @param $string 需要处理的字符串或数组
 * @return mixed
 */
function new_stripslashes($string) {
    if(!is_array($string)) return stripslashes($string);
    foreach($string as $key => $val) $string[$key] = new_stripslashes($val);
    return $string;
}

/**
 * 返回经htmlspecialchars处理过的字符串或数组
 * @param $obj 需要处理的字符串或数组
 * @return mixed
 */
function new_html_special_chars($string) {
    $encoding = 'utf-8';
    if(strtolower(CHARSET)=='gbk') $encoding = 'ISO-8859-15';
    if(!is_array($string)) return htmlspecialchars($string,ENT_QUOTES,$encoding);
    foreach($string as $key => $val) $string[$key] = new_html_special_chars($val);
    return $string;
}

function new_html_entity_decode($string) {
    $encoding = 'utf-8';
    if(strtolower(CHARSET)=='gbk') $encoding = 'ISO-8859-15';
    return html_entity_decode($string,ENT_QUOTES,$encoding);
}

function new_htmlentities($string) {
    $encoding = 'utf-8';
    if(strtolower(CHARSET)=='gbk') $encoding = 'ISO-8859-15';
    return htmlentities($string,ENT_QUOTES,$encoding);
}

/**
 * 安全过滤函数
 *
 * @param $string
 * @return string
 */
function safe_replace($string) {
    $string = str_replace('%20','',$string);
    $string = str_replace('%27','',$string);
    $string = str_replace('%2527','',$string);
    $string = str_replace('*','',$string);
    $string = str_replace('"','&quot;',$string);
    $string = str_replace("'",'',$string);
    $string = str_replace('"','',$string);
    $string = str_replace(';','',$string);
    $string = str_replace('<','&lt;',$string);
    $string = str_replace('>','&gt;',$string);
    $string = str_replace("{",'',$string);
    $string = str_replace('}','',$string);
    $string = str_replace('\\','',$string);
    return $string;
}

/**
 * xss过滤函数
 *
 * @param $string
 * @return string
 */
function remove_xss($string) { 
    $string = preg_replace('/[\x00-\x08\x0B\x0C\x0E-\x1F\x7F]+/S', '', $string);

    $parm1 = Array('javascript', 'vbscript', 'expression', 'applet', 'meta', 'xml', 'blink', 'link', 'script', 'embed', 'object', 'iframe', 'frame', 'frameset', 'ilayer', 'layer', 'bgsound', 'title', 'base');

    $parm2 = Array('onabort', 'onactivate', 'onafterprint', 'onafterupdate', 'onbeforeactivate', 'onbeforecopy', 'onbeforecut', 'onbeforedeactivate', 'onbeforeeditfocus', 'onbeforepaste', 'onbeforeprint', 'onbeforeunload', 'onbeforeupdate', 'onblur', 'onbounce', 'oncellchange', 'onchange', 'onclick', 'oncontextmenu', 'oncontrolselect', 'oncopy', 'oncut', 'ondataavailable', 'ondatasetchanged', 'ondatasetcomplete', 'ondblclick', 'ondeactivate', 'ondrag', 'ondragend', 'ondragenter', 'ondragleave', 'ondragover', 'ondragstart', 'ondrop', 'onerror', 'onerrorupdate', 'onfilterchange', 'onfinish', 'onfocus', 'onfocusin', 'onfocusout', 'onhelp', 'onkeydown', 'onkeypress', 'onkeyup', 'onlayoutcomplete', 'onload', 'onlosecapture', 'onmousedown', 'onmouseenter', 'onmouseleave', 'onmousemove', 'onmouseout', 'onmouseover', 'onmouseup', 'onmousewheel', 'onmove', 'onmoveend', 'onmovestart', 'onpaste', 'onpropertychange', 'onreadystatechange', 'onreset', 'onresize', 'onresizeend', 'onresizestart', 'onrowenter', 'onrowexit', 'onrowsdelete', 'onrowsinserted', 'onscroll', 'onselect', 'onselectionchange', 'onselectstart', 'onstart', 'onstop', 'onsubmit', 'onunload');

    $parm = array_merge($parm1, $parm2); 

    for ($i = 0; $i < sizeof($parm); $i++) { 
        $pattern = '/'; 
        for ($j = 0; $j < strlen($parm[$i]); $j++) { 
            if ($j > 0) { 
                $pattern .= '('; 
                $pattern .= '(&#[x|X]0([9][a][b]);?)?'; 
                $pattern .= '|(&#0([9][10][13]);?)?'; 
                $pattern .= ')?'; 
            }
            $pattern .= $parm[$i][$j]; 
        }
        $pattern .= '/i';
        $string = preg_replace($pattern, ' ', $string); 
    }
    return $string;
}

/**
 * 过滤ASCII码从0-28的控制字符
 * @return String
 */
function trim_unsafe_control_chars($str) {
    $rule = '/[' . chr ( 1 ) . '-' . chr ( 8 ) . chr ( 11 ) . '-' . chr ( 12 ) . chr ( 14 ) . '-' . chr ( 31 ) . ']*/';
    return str_replace ( chr ( 0 ), '', preg_replace ( $rule, '', $str ) );
}

/**
 * 格式化文本域内容
 *
 * @param $string 文本域内容
 * @return string
 */
function trim_textarea($string) {
    $string = nl2br ( str_replace ( ' ', '&nbsp;', $string ) );
    return $string;
}

/**
 * 将文本格式成适合js输出的字符串
 * @param string $string 需要处理的字符串
 * @param intval $isjs 是否执行字符串格式化，默认为执行
 * @return string 处理后的字符串
 */
function format_js($string, $isjs = 1) {
    $string = addslashes(str_replace(array("\r", "\n", "\t"), array('', '', ''), $string));
    return $isjs ? 'document.write("'.$string.'");' : $string;
}

/**
 * 转义 javascript 代码标记
 *
 * @param $str
 * @return mixed
 */
 function trim_script($str) {
    if(is_array($str)){
        foreach ($str as $key => $val){
            $str[$key] = trim_script($val);
        }
     }else{
         $str = preg_replace ( '/\<([\/]?)script([^\>]*?)\>/si', '&lt;\\1script\\2&gt;', $str );
        $str = preg_replace ( '/\<([\/]?)iframe([^\>]*?)\>/si', '&lt;\\1iframe\\2&gt;', $str );
        $str = preg_replace ( '/\<([\/]?)frame([^\>]*?)\>/si', '&lt;\\1frame\\2&gt;', $str );
        $str = str_replace ( 'javascript:', 'javascript：', $str );
     }
    return $str;
}
/**
 * 获取当前页面完整URL地址
 */
function get_url() {
    $sys_protocal = isset($_SERVER['SERVER_PORT']) && $_SERVER['SERVER_PORT'] == '443' ? 'https://' : 'http://';
    $php_self = $_SERVER['PHP_SELF'] ? safe_replace($_SERVER['PHP_SELF']) : safe_replace($_SERVER['SCRIPT_NAME']);
    $path_info = isset($_SERVER['PATH_INFO']) ? safe_replace($_SERVER['PATH_INFO']) : '';
    $relate_url = isset($_SERVER['REQUEST_URI']) ? safe_replace($_SERVER['REQUEST_URI']) : $php_self.(isset($_SERVER['QUERY_STRING']) ? '?'.safe_replace($_SERVER['QUERY_STRING']) : $path_info);
    return $sys_protocal.(isset($_SERVER['HTTP_HOST']) ? $_SERVER['HTTP_HOST'] : '').$relate_url;
}
/**
 * 字符截取 支持UTF8/GBK
 * @param $string
 * @param $length
 * @param $dot
 */
function str_cut($string, $length, $dot = '...') {
    $strlen = strlen($string);
    if($strlen <= $length) return $string;
    $string = str_replace(array(' ','&nbsp;', '&amp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;'), array('∵',' ', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), $string);
    $strcut = '';
    if(strtolower(CHARSET) == 'utf-8') {
        $length = intval($length-strlen($dot)-$length/3);
        $n = $tn = $noc = 0;
        while($n < strlen($string)) {
            $t = ord($string[$n]);
            if($t == 9 || $t == 10 || (32 <= $t && $t <= 126)) {
                $tn = 1; $n++; $noc++;
            } elseif(194 <= $t && $t <= 223) {
                $tn = 2; $n += 2; $noc += 2;
            } elseif(224 <= $t && $t <= 239) {
                $tn = 3; $n += 3; $noc += 2;
            } elseif(240 <= $t && $t <= 247) {
                $tn = 4; $n += 4; $noc += 2;
            } elseif(248 <= $t && $t <= 251) {
                $tn = 5; $n += 5; $noc += 2;
            } elseif($t == 252 || $t == 253) {
                $tn = 6; $n += 6; $noc += 2;
            } else {
                $n++;
            }
            if($noc >= $length) {
                break;
            }
        }
        if($noc > $length) {
            $n -= $tn;
        }
        $strcut = substr($string, 0, $n);
        $strcut = str_replace(array('∵', '&', '"', "'", '“', '”', '—', '<', '>', '·', '…'), array(' ', '&amp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;'), $strcut);
    } else {
        $dotlen = strlen($dot);
        $maxi = $length - $dotlen - 1;
        $current_str = '';
        $search_arr = array('&',' ', '"', "'", '“', '”', '—', '<', '>', '·', '…','∵');
        $replace_arr = array('&amp;','&nbsp;', '&quot;', '&#039;', '&ldquo;', '&rdquo;', '&mdash;', '&lt;', '&gt;', '&middot;', '&hellip;',' ');
        $search_flip = array_flip($search_arr);
        for ($i = 0; $i < $maxi; $i++) {
            $current_str = ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
            if (in_array($current_str, $search_arr)) {
                $key = $search_flip[$current_str];
                $current_str = str_replace($search_arr[$key], $replace_arr[$key], $current_str);
            }
            $strcut .= $current_str;
        }
    }
    return $strcut.$dot;
}



/**
 * 获取请求ip
 *
 * @return ip地址
 */
function ip() {
    if(getenv('HTTP_CLIENT_IP') && strcasecmp(getenv('HTTP_CLIENT_IP'), 'unknown')) {
        $ip = getenv('HTTP_CLIENT_IP');
    } elseif(getenv('HTTP_X_FORWARDED_FOR') && strcasecmp(getenv('HTTP_X_FORWARDED_FOR'), 'unknown')) {
        $ip = getenv('HTTP_X_FORWARDED_FOR');
    } elseif(getenv('REMOTE_ADDR') && strcasecmp(getenv('REMOTE_ADDR'), 'unknown')) {
        $ip = getenv('REMOTE_ADDR');
    } elseif(isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], 'unknown')) {
        $ip = $_SERVER['REMOTE_ADDR'];
    }
    return preg_match ( '/[\d\.]{7,15}/', $ip, $matches ) ? $matches [0] : '';
}

function get_cost_time() {
    $microtime = microtime ( TRUE );
    return $microtime - SYS_START_TIME;
}
/**
 * 程序执行时间
 *
 * @return    int    单位ms
 */
function execute_time() {
    $stime = explode ( ' ', SYS_START_TIME );
    $etime = explode ( ' ', microtime () );
    return number_format ( ($etime [1] + $etime [0] - $stime [1] - $stime [0]), 6 );
}


/**
* 将字符串转换为数组
*
* @param    string    $data    字符串
* @return    array    返回数组格式，如果，data为空，则返回空数组
*/
function string2array($data) {
    if($data == '') return array();
    $data = stripslashes($data);
    @eval("\$array = $data;");
    return $array;
}
/**
* 将数组转换为字符串
*
* @param    array    $data        数组
* @param    bool    $isformdata    如果为0，则不使用new_stripslashes处理，可选参数，默认为1
* @return    string    返回字符串，如果，data为空，则返回空
*/
function array2string($data, $isformdata = 1) {
    if($data == '') return '';
    if($isformdata) $data = new_stripslashes($data);
    return addslashes(var_export($data, TRUE));
}

/**
* 转换字节数为其他单位
*
*
* @param    string    $filesize    字节大小
* @return    string    返回大小
*/
function sizecount($filesize) {
    if ($filesize >= 1073741824) {
        $filesize = round($filesize / 1073741824 * 100) / 100 .' GB';
    } elseif ($filesize >= 1048576) {
        $filesize = round($filesize / 1048576 * 100) / 100 .' MB';
    } elseif($filesize >= 1024) {
        $filesize = round($filesize / 1024 * 100) / 100 . ' KB';
    } else {
        $filesize = $filesize.' Bytes';
    }
    return $filesize;
}
/**
* 字符串加密、解密函数
*
*
* @param    string    $txt        字符串
* @param    string    $operation    ENCODE为加密，DECODE为解密，可选参数，默认为ENCODE，
* @param    string    $key        密钥：数字、字母、下划线
* @param    string    $expiry        过期时间
* @return    string
*/
function sys_auth($string, $operation = 'ENCODE', $key = '', $expiry = 0) {
    $key_length = 4;
    $key = md5($key != '' ? $key : app_base::load_config('system', 'auth_key'));
    $fixedkey = md5($key);
    $egiskeys = md5(substr($fixedkey, 16, 16));
    $runtokey = $key_length ? ($operation == 'ENCODE' ? substr(md5(microtime(true)), -$key_length) : substr($string, 0, $key_length)) : '';
    $keys = md5(substr($runtokey, 0, 16) . substr($fixedkey, 0, 16) . substr($runtokey, 16) . substr($fixedkey, 16));
    $string = $operation == 'ENCODE' ? sprintf('%010d', $expiry ? $expiry + time() : 0).substr(md5($string.$egiskeys), 0, 16) . $string : base64_decode(substr($string, $key_length));

    $i = 0; $result = '';
    $string_length = strlen($string);
    for ($i = 0; $i < $string_length; $i++){
        $result .= chr(ord($string{$i}) ^ ord($keys{$i % 32}));
    }
    if($operation == 'ENCODE') {
        return $runtokey . str_replace('=', '', base64_encode($result));
    } else {
        if((substr($result, 0, 10) == 0 || substr($result, 0, 10) - time() > 0) && substr($result, 10, 16) == substr(md5(substr($result, 26).$egiskeys), 0, 16)) {
            return substr($result, 26);
        } else {
            return '';
        }
    }
}
/**
* 语言文件处理
*
* @param    string        $language    标示符
* @param    array        $pars    转义的数组,二维数组 ,'key1'=>'value1','key2'=>'value2',
* @param    string        $modules 多个模块之间用半角逗号隔开，如：member,guestbook
* @return    string        语言字符
*/
function L($language = 'no_language',$pars = array(), $modules = '') {
    static $LANG = array();
    static $LANG_MODULES = array();
    static $lang = '';
    if(defined('IN_ADMIN')) {
        $lang = SYS_STYLE ? SYS_STYLE : 'zh-cn';
    } else {
        $lang = app_base::load_config('system','lang');
    }
    if(!$LANG) {
        require_once CODE_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.'system.lang.php';
        if(defined('IN_ADMIN')) require_once CODE_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.'system_menu.lang.php';
        if(file_exists(CODE_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.ROUTE_M.'.lang.php')) require_once CODE_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.ROUTE_M.'.lang.php';
    }
    if(!empty($modules)) {
        $modules = explode(',',$modules);
        foreach($modules AS $m) {
            if(!isset($LANG_MODULES[$m])) require_once CODE_PATH.'languages'.DIRECTORY_SEPARATOR.$lang.DIRECTORY_SEPARATOR.$m.'.lang.php';
        }
    }
    if(!array_key_exists($language,$LANG)) {
        return $language;
    } else {
        $language = $LANG[$language];
        if($pars) {
            foreach($pars AS $_k=>$_v) {
                $language = str_replace('{'.$_k.'}',$_v,$language);
            }
        }
        return $language;
    }
}

/**
 * 模板调用
 *
 * @param $module
 * @param $template
 * @param $istag
 * @return unknown_type
 */
function template($module = 'content', $template = 'index', $style = '') {

    if(strpos($module, 'plugin/')!== false) {
        $plugin = str_replace('plugin/', '', $module);
        return p_template($plugin, $template,$style);
    }
    $module = str_replace('/', DIRECTORY_SEPARATOR, $module);
    if(!empty($style) && preg_match('/([a-z0-9\-_]+)/is',$style)) {
    } elseif (empty($style) && !defined('STYLE')) {
        if(defined('SITEID')) {
            $siteid = SITEID;
        } else {
            $siteid = param::get_cookie('siteid');
        }
        if (!$siteid) $siteid = 1;
        $sitelist = getcache('sitelist','commons');
        if(!empty($siteid)) {
            $style = $sitelist[$siteid]['default_style'];
        }
    } elseif (empty($style) && defined('STYLE')) {
        $style = STYLE;
    } else {
        $style = 'default';
    }
    if(!$style) $style = 'default';
    $template_cache = app_base::load_sys_class('template_cache');
    $compiledtplfile = ROOT_PATH.'caches'.DIRECTORY_SEPARATOR.'caches_template'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.php';
    if(file_exists(CODE_PATH.'templates'.DIRECTORY_SEPARATOR.$style.DIRECTORY_SEPARATOR.$module.DIRECTORY_SEPARATOR.$template.'.html')) {
        if(!file_exists($compiledt

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