pdo 整套类的封装，保存修改查询

  
    

   
     
<?php
   
     
/**
   
     
 *
   
     
 */
   
     
class Db{
   
     
 private $host = '';
   
     
 private $port = '';
   
     
 private $user = '';
   
     
 private $pass = '';
   
     
 private $dbname = '';
   
     
 private $charset='';
   
     
 private $tbp = '';
   
     
 private $db = '';
   
     
 
   
     
 /**
   
     
 * 返回 pdo对象
   
     
 */
   
     
 public function getDb(){
   
     
 return $this->db;
   
     
 }
   
     
 
   
     
 /**
   
     
 * @param $tbp 表名前辍
   
     
 */
   
     
 public function setTbp($tbp=''){
   
     
 $this->tbp = $tbp;
   
     
 }
   
     
 
   
     
 public function __construct($host='localhost',$port='3306',$user='root',$pass='',$dbname='fzdb',$charset='utf8',$tbp='fz_'){
   
     
 $dsn = "mysql:host=$host;port=$port;dbname=$dbname";
   
     
 $opt = [1002 =>"set names $charset"];
   
     
 try {
   
     
 $this->db = new PDO ( $dsn, 'root', '', $opt );
   
     
 $this->host = $host;
   
     
 $this->port = $port;
   
     
 $this->user = $user;
   
     
 $this->pass = $pass;
   
     
 $this->dbname = $dbname;
   
     
 $this->tbp = $tbp;
   
     
 $this->charset = $charset;
   
     
 } catch ( Exception $e ) {
   
     
 exit ( '数据库服务器连接失败，程序终止' );
   
     
 }
   
     
 }
   
     
 /**
   
     
 * 
   
     
 * @param unknown $t 表名，不含执行时会自动加上表前辍
   
     
 * @param unknown $d 要插入的数据是关联数组
   
     
 */
   
     
 public function gomsg($url='',$msg=''){
   
     
 echo '<script>';
   
     
 echo "alert('$msg');";
   
     
 echo "location.href='$url'";
   
     
 echo '</script>';
   
     
 }
   
     
 
   
     
 
   
     
 public function save($t,$d){
   
     
 $t = $this->tbp.$t;
   
     
 foreach($d as $key=>$v){
   
     
 $kk[] = $key;
   
     
 $vv[] = ':'.$key;
   
     
 }
   
     
 $kk = implode(',',$kk);
   
     
 $vv = implode(',',$vv);
   
     
 $stmt = $this->db->prepare("insert into $t($kk) values($vv)");
   
     
 $stmt->execute($d);
   
     
 $stmt->closeCursor();
   
     
 }
   
     
 
   
     
 public function query($t,$f='*',$w='1=1',$o='',$l='limit 10'){
   
     
 $t = $this->tbp.$t;
   
     
 $stmt = $this->db->prepare("select $f from $t where $w $o $l");
   
     
 $stmt->execute();
   
     
 $rs = $stmt->fetchAll(PDO::FETCH_ASSOC);
   
     
 $stmt->closeCursor();
   
     
 return $rs; 
   
     
 }
   
     
 
   
     
 public function delete($t,$w='1=1'){
   
     
 $t = $this->tbp.$t;
   
     
 $stmt = $this->db->prepare("delete from $t where $w");
   
     
 $stmt->execute();
   
     
 $stmt->closeCursor();
   
     
 }
   
     
 
   
     
 public function getcount($t,$w='1=1'){
   
     
 $t = $this->tbp.$t;
   
     
 $stmt = $this->db->prepare("select count(*) from $t where $w");
   
     
 $stmt->execute();
   
     
 $stmt->bindColumn(1, $c);
   
     
 $stmt->fetchAll(PDO::FETCH_NUM);
   
     
 return $c;
   
     
 }
   
     
 
   
     
 public function updatenum($t,$f,$w='1=1'){
   
     
 $t = $this->tbp.$t;
   
     
 $stmt = $this->db->prepare("update $t set $f where $w");
   
     
 $stmt->execute();
   
     
 $stmt->closeCursor(); 
   
     
 }
   
     
 
   
     
 public function pager($t,$currpage=1,$f='*',$pagesize=3,$w='1=1',$o='',$ty=''){
   
     
 $recordcount = $this->getcount($t,$w);
   
     
 $t = $this->tbp.$t;
   
     
 
   
     
 $stmt = $this->db->prepare("select $f from $t where $w $o limit ?,?");
   
     
 $pagecount = ceil($recordcount/$pagesize);
   
     
 
   
     
 $currpage = $currpage<1 ? 1 : $currpage;
   
     
 $currpage = $currpage>$pagecount ? $pagecount : $currpage;
   
     
 
   
     
 $start = $currpage*$pagesize - $pagesize;
   
     
 $stmt->bindParam(1, $start, PDO::PARAM_INT);
   
     
 $stmt->bindParam(2, $pagesize, PDO::PARAM_INT);
   
     
 $stmt->execute();
   
     
 $row[] = $stmt->fetchAll(PDO::FETCH_ASSOC);
   
     
 
   
     
 $first = 1;
   
     
 $end = 10;
   
     
 $pages = '<div class="page">';
   
     
 if($currpage>=7){
   
     
 $first = $currpage-5;
   
     
 $end = $first+$end-1;
   
     
 }
   
     
 if($currpage>1){
   
     
 $prev = $currpage-1;
   
     
 if($first>1){
   
     
 $pages.="<a href=?".$ty."p=1>首页</a><a href=?".$ty."p=$prev>上一页</a>";
   
     
 }else{
   
     
 $pages.="<a href=?".$ty."p=$prev>上一页</a>";
   
     
 }
   
     
 }
   
     
 for($i=$first;$i<=$end;$i++){
   
     
 if($i>$pagecount){
   
     
 break;
   
     
 }
   
     
 if($i==$currpage){
   
     
 $pages.='<a class="checked">'.$i.'</a>';
   
     
 continue;
   
     
 }
   
     
 $pages.="<a href=?".$ty."p=$i>$i</a>";
   
     
 }
   
     
 if($currpage<$pagecount){
   
     
 $next = $currpage+1;
   
     
 $pages.="<a href=?".$ty."p=$next>下一页</a>";
   
     
 }
   
     
 if($end<$pagecount){
   
     
 $pages.="<a href=?".$ty."p=$pagecount>尾页</a>";
   
     
 }
   
     
 $row[] = $pages.'</div>';
   
     
 $row[] = $pagesize;
   
     
 $row[] = $pagecount;
   
     
 $row[] = $recordcount;
   
     
 $row[] = $currpage;
   
     
 return $row;
   
     
 }
   
     
 
   
     
 public function css1(){
   
     
 $css = <<<css
   
     
 <style>
   
     
 .page{font-size:12px;height:30px;padding:15px 0;clear:both;overflow:hidden;text-align:center;}
   
     
 .page a{text-decoration:none;line-height:25px;padding:0px 10px;display:inline-block;margin-right:5px;border:solid 1px #c8c7c7;}
   
     
 .page a:hover,.page a.checked{text-decoration:none;border:solid 1px #0086d6;background:#0091e3;color:#fff;}
   
     
 .page a:visited,.page a:link{color:#333;}
   
     
 .page a:active{color:#3B3B3B;}
   
     
 </style>
   
     
css;
   
     
 echo $css;
   
     
 }
   
     
 
   
     
 public function md5($p,$c='webrx'){
   
     
 $s1 = md5($p.$c);
   
     
 $s2 = sha1($p.$c);
   
     
 $sok = substr($s1,0,6).substr($s2,0,6);
   
     
 $sok .= substr($s1,12,5).substr($s2,22,5);
   
     
 $sok .= substr($s1,22,5).substr($s2,32,5);
   
     
 return $sok;
   
     
 } 
   
     
 public function update($t,$d,$w='1=1'){
   
     
 $t = $this->tbp.$t;
   
     
 foreach($d as $key=>$v){
   
     
 $kk[] = $key.'=:'.$key;
   
     
 }
   
     
 $kk = implode(',',$kk);
   
     
 $stmt = $this->db->prepare("update $t set $kk where $w");
   
     
 $stmt->execute($d);
   
     
 $stmt->closeCursor();
   
     
 }
   
     
 
   
     
 public function __destruct(){
   
     
 unset($this->db);
   
     
 }
   
     
}
  
    

来自为知笔记(Wiz)