PHP教程：使用PHP实现密保卡功能

密保卡入库

    $this->load->model('admin/m_mibao'); 
     
    $data = array();     
    //生成随机横坐标 
    $rand_str = $this->_rand_str(10); 
     
    $arr   = array(); 
    for($k=0;$k 
    { 
        for ($i = 1;$i < 9;$i++) 
        {            
            $rand = $this->_rand_num(3);  
            //赋给所有code的容器 
            $arr[$rand_str{$k} . $i] =  $rand; 
        } 
    } 
     
    $data['code']     = serialize($arr); //序列化后将信息入库 
    $data['letter']   = $rand_str; 
     
    //避免重复序列号 
    while (TRUE) 
    { 
            $data['card_num'] = $this->_rand_num(20); 
            //判断序列号是否重复存在 
        if($this->m_mibao->has_card_num($data['card_num']) == 0) 
        { 
            break; 
        } 
    } 
     
    $data['add_time'] = TIME; 
    $data['user_id']  = $uid; 
               
    echo $this->mibao->insert($data);

　　密保卡图片生成

    //就是算坐标 
           public function show($user_id) 
    { 
        $this->load->model('admin/m_mibao'); 
        $info = $this->m_mibao->get_by_uid($user_id); 
        if(emptyempty($info)) 
        { 
            $this->msg('该用户无密保卡!','admin-index'); 
        } 
         
        $codes = unserialize($info['code']); 
     
        //图片初始值 
         
        $bit = 3;  //密保卡位数 
         
        $height = 332;    //图片高度 
         
        $width =  626;    //图片宽度 
         
        $im = imagecreatetruecolor($width,$height); 
         
        $linecolor = imagecolorallocate($im, 229,229,229); 
         
        $fontcolor = imagecolorallocate($im, 0, 0, 0); 
         
        $top_rectangle_color = imagecolorallocate($im,241,254,237); 
         
        $top_letter_color = imagecolorallocate($im,54,126,76); 
         
        $left_rectangle_color = imagecolorallocate($im,243,247,255); 
         
        $left_num_color = imagecolorallocate($im,4,68,192); 
         
        $logo_str_color = imagecolorallocate($im,0,0,0); 
         
        imagefill($im,0,0,imagecolorallocate($im,255,255,255));  //图片背景色 
         
        $font    = './public/baomi/fonts/simsun.ttc';  //字体 
         
        $font_en = './public/baomi/fonts/CONSOLA.TTF'; //英文字体 
         
        $font2   = './public/baomi/fonts/simhei.ttf'; //密保卡上方黑体 
         
         
        $dst = imagecreatefromjpeg("./public/baomi/120.jpg"); 
         
         
         
        imagecopymerge($im,$dst,120,15,0,0,193,55,100); 
         
        imageline($im,10,72,$width-10,72,$linecolor); 
         
        $ltext = "电子密保卡"; 
         
        if(!imagettftext($im,10,0,340,47,$logo_str_color,$font2,$ltext)) { 
            exit('error');    
        } 
         
        //写入卡号 
         
        $b = '1000' . $info['card_num']; 
         
        for($i=0;$i<7;$i++){ 
         
            $p.= substr($b,3*$i,4). ' '; 
         
        } 
         
        $x = 40; $y = 95; //序列号位置 
         
        imagettftext($im,10,0,$x,$y,$color,$font,'序列号'); 
         
        imagettftext($im,11,0,$x+50,$y,$color,$font_en,$p); 
         
        //颜色框 
         
        imagefilledrectangle($im,10,106,$width-10,128,$top_rectangle_color); 
         
        imagefilledrectangle($im,10,129,65,$height-10,$left_rectangle_color); 
         
        //写入最上排英文字母及竖线 
         
        for($i=1;$i<=10;$i++){ 
         
            $x = $i*55+35;      $y = 123;    $float_size = 11;   //字母位置参数                
         
            imagettftext($im,$float_size,0,$x,$y,$top_letter_color,$font_en,$info['letter']{$i-1});//写入最上排英文字母 
         
        } 
         
        for($i=0;$i<=9;$i++){ 
         
            $linex = $i*55+65;    $liney = 105;    $liney2 = $height-10;  //竖线位置参数 
         
            imageline($im,$linex,$liney,$linex,$liney2,$linecolor);//划入竖线 
         
        } 
         
             
         
        //写入竖排数字及填入矩阵数据 划横线 
         
        for($j=0;$j<8;$j++){ 
         
            $jj=$j+1; 
         
            $x=35;  $y=($jj*24)+123; //左排数字及横线位置参数 
         
            imagettftext($im, $float_size, 0, $x, $y, $left_num_color, $font_en, $jj);//写入左排数字 
         
            for($i=1;$i<=10;$i++){ 
         
                $float_size2=11;  $x = $i*55+27;  $sy=$y;  //填入矩阵数据位置参数 
         
               $s = $info['letter']{$i-1}; 
               $s .= $j + 1; 
               imagettftext($im,$float_size2,0,$x,$sy,$fontcolor,$font_en,$codes[$s]);//写入矩阵数据 
         
            } 
        } 
         
        for($j=0;$j<10;$j++){ 
         
            $line_x=10; $line_x2=$width-10;$y=$j*24+105; //横线位置参数 y坐标数据同上 
         
            imageline($im,$line_x,$y,$line_x2,$y,$linecolor);//划入横线 
         
        } 
         
        //外框边线 
         
        imageline($im,10,10,$width-10,10,$linecolor);//横线 
         
        //imageline($im,10,$height-10,$width-10,$height-10,$linecolor); 
         
        imageline($im,10,10,10,$height-10,$linecolor);//竖线 
         
        imageline($im,$width-10,10,$width-10,$height-10,$linecolor); 
         
        //生成图片 
         
        ob_clean(); 
        header("Content-type: image/jpeg"); 
        imagejpeg($im,null,100); 
        imagedestroy($im);       
    }

　　密保卡验证

    public function test1($uid) 
    { 
     
        $this->load->model('admin/m_users');         
        $user = $this->m_users->sel($uid); 
     
        //post提交过来验证 
        if($this->is_post()) 
        { 
            $codes = $this->m_mibao->get_codes_by_uid($uid); 
            $codes = unserialize($codes); 
     
            $is_true = true; 
            foreach($_SESSION['mibao']['keys'] as $key) 
            { 
                if($codes[$key] != $_POST['values'][$key]) 
                { 
                    $is_true = false; 
                } 
            } 
             
            if($is_true) 
            {            
                die('正确'); 
            } 
            else  
            { 
                 
                die('错误'); 
            } 
        } 
        else 
        { 
            //渲染视图 
            $info = $this->m_mibao->get_by_uid($uid); 
            $data = array(); 
            $data['keys'] = $this->m_mibao->get_rand_keys($info['letter']); 
            $_SESSION['mibao']['keys'] = $data['keys']; 
            $data['uid'] = $uid; 
            $this->load->view('test1',$data); 
        }