dedecms二次开发中对数据库操作类的使用尤为重要,下面是对数据库操作类的一些简单说明和实例。
引入common.inc.php文件
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require_once (dirname(__FILE__) . "/include/common.inc.php"); |
查询某表是否存在,存在返回TRUE,否则返回FALSE
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if($dsql->IsTable("dede_addonarticle,#@__archives")){ //注意“#@__”,是两个下横杠 echo "表存在"; exit; }else{ echo "表不存在"; exit; } |
获取一条记录的内容
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$row = $dsql->GetOne("Select * From dede_* where id = $aid"); echo $row['id']; |
将查询获取总数输出
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$row = $dsql->GetOne("select count(*) as dd where typeid = $typeid"); echo $row['dd'];//输出总数 |
将查询的若干条记录输出
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$sql = "Select * from dede_*"; $dsql->SetQuery($sql);//将SQL查询语句格式化 $dsql->Execute();//执行SQL操作 //通过循环输出执行查询中的结果 while($row = $dsql->GetArray()){ echo $row['id']; echo $row['title']; } //或者采取这种方式输出内容 while($row = $dsql->GetObject()){ echo $row->id; echo $row->Title; } |
将查询的若干条记录输出dedecms5
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$dsql->SetQuery("Select id,typename From `#@__arctype` where reid=0 And channeltype=1 And ishidden=0 And ispart<>2 order by sortrank"); $dsql->Execute(); while($row=$dsql->GetObject()) { $channellist .= "<a href='wap.php?action=list&id={$row->id}'>{$row->typename}</a> "; echo $row->id; } |
插入一条记录
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$sql = " INSERT INTO `dede_member_flink`(mid,title,url,linktype,imgurl,imgwidth,imgheight) VALUES(".$cfg_ml->M_ID.",'$title','$url','$linktype','$imgurl','$imgwidth','$imgheight');";//插入记录数据库 $dsql->SetQuery($sql);//格式化查询语句 $dsql->ExecNoneQuery();//执行SQL操作 |
经实践证明,上面的语句不能正常插入数据库,下面是正确的语句
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$sql = " INSERT INTO `dede_member_flink`(mid,title,url,linktype,imgurl,imgwidth,imgheight) VALUES(".$cfg_ml->M_ID.",'$title','$url','$linktype','$imgurl','$imgwidth','$imgheight');";//插入记录数据库 $dsql->ExecuteNoneQuery($sql);//执行SQL操作 $gid = $dsql->GetLastID();//获取刚刚插入的id |
删除一条记录
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$sql = "Delete From dede_member_flink where aid='$aid' And mid='".$cfg_ml->M_ID."';"; $dsql->SetQuery($sql); $dsql->ExecNoneQuery(); //或者使用简化模式 $dsql->ExecNoneQuery("Delete From dede_member_flink where aid='$aid' And mid='".$cfg_ml->M_ID."';"); |
更新一条记录
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$upquery = " Update dede_member_flink set title='$title',url='$url',linktype='$linktype', imgurl='$imgurl',imgwidth='$imgwidth',imgheight='$imgheight' where aid='$aid' And mid='".$cfg_ml->M_ID."'; "; $rs = $dsql->ExecuteNoneQuery($upquery); |
判断获取数据库内容的常用方法
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$row = $dsql->GetOne("Select * From dede_moneycard_type where tid={$pid}"); if(!is_array($row)){ echo "失败"; exit(); } ///////////////////////////// $upquery = " Update dede_member_flink set title='$title',url='$url',linktype='$linktype', imgurl='$imgurl',imgwidth='$imgwidth',imgheight='$imgheight' where aid='$aid' And mid='".$cfg_ml->M_ID."'; "; $rs = $dsql->ExecuteNoneQuery($upquery); if($rs){ echo "成功"; }else{ echo "失败"; } |
获取总数
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$dsql = new DedeSql(false); $dsql->SetQuery("Select * from `dede_admin` where userid='$userid' Or uname='$uname'"); $dsql->Execute(); $ns = $dsql->GetTotalRow(); |
关闭数据库
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$dsql->Close(); |