怎么在function里操作pdo呀

如何在function里操作pdo呀
代码如下

require("../inc/pdo.php");<br />
<br />
function output($action,$select,$name){<br />
$select=$dbc->prepare("select id,ztname,zttype,zttime,headimg,riseimg from naszt where 1=1 and zttype=:zttype");<br />
$select->bindValue(":zttype",$action);<br />
$select->execute();<br />
$result='';<br />
while($row=$select->fetch()){<br />
$result.='<ul id="thumbs"><li class="'.$name.'">';<br />
$result.='<div class="img-container">';<br />
$result.='<div class="item-img">';<br />
$result.='<img  src="ztImg/'.$row['riseimg'].'"   style="max-width:90%" 怎么在function里操作pdo呀 " ></div><ul>';<br />
$result.='<li><a href="portfolio-single.html" class="view">测试1</a></li>';<br />
$result.='<li><a href='.$row['headimg'].' class="preview" data-rel="prettyPhoto[web]">测试12</a></li></ul></div><div class="item-info">';<br />
$result.='<h3 class="title">'.$row['ztname'].'</h3>';<br />
$result.='<span class="category">'. $row['zttype'].'</span>';	<br />
$result.='<p class="intro">1推荐日期:'.$row['zttime'].'</p></div></li>';<br />
	}<br />
return $result;<br />
}

<?php<br />
header("Content-Type:text/html;charset=utf-8");<br />
$dbtype='mysql';<br />
$host='127.0.0.1';<br />
$dbName='nas';<br />
$user='227227';<br />
$pass='227227';<br />
$db="$dbtype:host=$host;dbname=$dbName";<br />
try{<br />
$dbc=new PDO($db,$user,$pass);<br />
$dbc->exec('SET CHARACTER SET utf8');<br />
$dbc->setAttribute(PDO::ATTR_EMULATE_PREPARES, false); //禁用prepared statements的仿真<br />
	}catch(PDOException $e){<br />
echo $e->getMessage();<br />
}<br />
?>

我想在function调用pdo 
是不是在pdo里面写class  function要继承这个类？

求大神出手指点该如何写！

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------解决方案--------------------
推荐看一下这个呀　　
http://php.xlxz.org/2013/11/370/

<?php<br />
 <br />
include 'sql_build_query.php';<br />
include 'pdo_query.php';<br />
$db     = new pdo_db;<br />
 <br />
$sql    = $db->pdo_query('show databases ');<br />
 <br />
var_dump( $sql, $db->dbVersion() );<br />
 <br />
exit;<br />
 <br />
$sql    = $db->select( 'i.kd k, io.id dk, iil.ii ds' )->from( 'test t' )<br />
        ->leftjoin( 'post p', 't.id = ?', array( 2 ) )<br />
        ->order( 'name DESC, id ASC'  )<br />
        ->where( array( 'xin = ? AND do > ?' => array( 1,3 )))<br />
        ->having( array('xin' => 'dkls' ))<br />
        ->group( 'id' )<br />
        ->limit( 3,4 )<br />
        ->queryAll();<br />
exit;<br />
//var_dump( $sql );<br />
 <br />
$sql    = $db->from( 'test')<br />
        ->insert( array( 'kd' => '233', 'dkwe' => 323 ));<br />
 <br />
$sql    = $db->from( 'test' )<br />
        ->where( array( '( dk = ? and kd > ?) or ( dk = ? and ddd = ?)' => array( 2,3,5,4 )))<br />
        ->limit( 2 , 4 )<br />
        ->update( array( 'dkddl' => 'd', 'kdls' => 'dkdl' ));<br />
 <br />
$sql    = $db->from( 'test,test' )<br />
        ->select( 'test,test' )<br />
        ->where( array( 'id' => array( 3,3,4,2,3) ))<br />
        ->limit( '3', 3)<br />
        ->delete();

------解决方案--------------------

引用:

Quote: 引用:

包含pdo类文件，实例化类，给参数。

好的，另外我想请问下您，pdo如何拼接sql呀 比如where 1=1 and  tile=null 没有值就忽略掉

WHere后面随便拼 一个变量 需要的时候赋值就是了