- 代码共享 - 分享我从discuz里面拿来的东东 - 喜悦国际村

isno (小仙)
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[广告]: Enom域名自助付费自助注册自助PUSH 主流域名COM等一律57.99元年

分享我从discuz里面拿来的东东

不犯法吧呵呵

先开帖别删哈

2007-11-27 11:18 AM

#1

isno (小仙)
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好想谈恋爱

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[广告]: 代充Paypal帐号美元

CODE:

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<?php
加解密函数

$encode = authocode('我要加密','ENCODE');

$decode = authocode('我要解密','DECODE');

$auth_key = 34577 ; //密钥
function authcode($string, $operation, $key = '') {

    $key = md5($key ? $key : $GLOBALS['auth_key']);
    $key_length = strlen($key);

    $string = $operation == 'DECODE' ? base64_decode($string) : substr(md5($string.$key), 0, 8).$string;
    $string_length = strlen($string);

    $rndkey = $box = array();
    $result = '';

    for($i = 0; $i <= 255; $i++) {
        $rndkey[$i] = ord($key[$i % $key_length]);
        $box[$i] = $i;
    }

    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, 8) == substr(md5(substr($result, 8).$key), 0, 8)) {
            return substr($result, 8);
        } else {
            return '';
        }
    } else {
        return str_replace('=', '', base64_encode($result));
    }

}

?>

2007-11-27 11:22 AM

#2

isno (小仙)
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好想谈恋爱

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[推荐阅读] 我又来了

CODE:

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<?php
字符串截取函数

$cutstr =  cutstr('截取我,hahahahahaaha','3');

function cutstr($string, $length, $dot = ' ...') {
    global $charset;

    if(strlen($string) <= $length) {
        return $string;
    }

    $string = str_replace(array('&', '"', '<', '>'), array('&', '"', '<', '>'), $string);

    $strcut = '';
    if(strtolower($charset) == 'utf-8') {

        $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);

    } else {
        for($i = 0; $i < $length - strlen($dot) - 1; $i++) {
            $strcut .= ord($string[$i]) > 127 ? $string[$i].$string[++$i] : $string[$i];
        }
    }

    $strcut = str_replace(array('&', '"', '<', '>'), array('&', '"', '<', '>'), $strcut);

    return $strcut.$dot;
}
function daddslashes($string, $force = 0) {
    !defined('MAGIC_QUOTES_GPC') && define('MAGIC_QUOTES_GPC', get_magic_quotes_gpc());
    if(!MAGIC_QUOTES_GPC || $force) {
        if(is_array($string)) {
            foreach($string as $key => $val) {
                $string[$key] = daddslashes($val, $force);
            }
        } else {
            $string = addslashes($string);
        }
    }
    return $string;
}
?>

2007-11-27 11:23 AM

#3

isno (小仙)
版主
Rank: 7

好想谈恋爱

UID 78818
精华 1
积分 115536
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[推荐阅读] 发火了

CODE:

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<?php

生成随机数的函数
function random($length, $numeric = 0) {
    PHP_VERSION < '4.2.0' && mt_srand((double)microtime() * 1000000);
    if($numeric) {
        $hash = sprintf('%0'.$length.'d', mt_rand(0, pow(10, $length) - 1));
    } else {
        $hash = '';
        $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789abcdefghijklmnopqrstuvwxyz';
        $max = strlen($chars) - 1;
        for($i = 0; $i < $length; $i++) {
            $hash .= $chars[mt_rand(0, $max)];
        }
    }
    return $hash;
}

?>

2007-11-27 11:25 AM

#4