Summary of examples of calling database classes in PHP files to execute SQL statements under Imperial CMS-Empire CMS-php.cn

Summary of examples of calling database classes in PHP files to execute SQL statements under Imperial CMS

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Release： 2019-11-29 11:53:46

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Summary of examples of calling database classes in PHP files to execute SQL statements under Imperial CMS

Example 1: Example of connecting to MYSQL database. (a.php)

The code is as follows:

<?php
require(&#39;e/class/connect.php&#39;); //引入数据库配置文件和公共函数文件
require(&#39;e/class/db_sql.php&#39;); //引入数据库操作文件
$link=db_connect(); //连接MYSQL
$empire=new mysqlquery(); //声明数据库操作类</p> <p>db_close(); //关闭MYSQL链接
$empire=null; //注消操作类变量
?>

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Example 2: Update data example. (b.php)

The code is as follows:

<?php
require(&#39;e/class/connect.php&#39;); //引入数据库配置文件和公共函数文件
require(&#39;e/class/db_sql.php&#39;); //引入数据库操作文件
$link=db_connect(); //连接MYSQL
$empire=new mysqlquery(); //声明数据库操作类</p> <p>$empire->query("update {$dbtbpre}ecms_news set 
onclick=onclick+1"); //给新闻表的点击数加1</p> <p>db_close(); //关闭MYSQL链接
$empire=null; //注消操作类变量
?>

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Recommended to study "Empirecms Tutorial"

Example 3: Example of querying MYSQL data. (c.php)

The code is as follows:

<?php
require(&#39;e/class/connect.php&#39;); //引入数据库配置文件和公共函数文件
require(&#39;e/class/db_sql.php&#39;); //引入数据库操作文件
$link=db_connect(); //连接MYSQL
$empire=new mysqlquery(); //声明数据库操作类</p> <p>$sql=$empire->query("select * from {$dbtbpre}ecms_news 
order
 by newstime limit 10"); //查询新闻表最新10条记录
while($r=$empire->fetch($sql)) //循环获取查询记录
{
echo"标题：".$r[&#39;title&#39;]."
";
}</p> <p>db_close(); //关闭MYSQL链接
$empire=null; //注消操作类变量
?>

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/e/class/db_sql.php file Commonly used function descriptions for database operation classes:

1. Execute SQL functions ：

The code is as follows:

$empire->query("SQL语句");
$empire->query1("SQL语句");

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Explanation:

Returns true if the execution is successful, false if the execution is unsuccessful;
The difference between the two is: query() interrupts directly when an error occurs Program execution, query1() error does not interrupt program execution.

Usage example:

The code is as follows:

$sql=$empire->query("select * from {$dbtbpre}ecms_news");

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2. Loop reading database record function:

The code is as follows:

$empire->fetch($sql)

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Description:

$sql is the result returned by query executing SQL.

Usage example:

The code is as follows:

$sql=$empire->query("select * from {$dbtbpre}ecms_news");
while($r=$empire->fetch($sql))
{
echo"标题：".$r['title']."
";
}

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3. Read a single database record function: (not looping)

The code is as follows:

$empire->fetch1("SQL语句")

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Usage example:

The code is as follows:

$r=$empire->fetch1("select * from {$dbtbpre}ecms_news where id=1");
echo"标题：".$r[&#39;title&#39;];

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4. Statistics SQL query record number function:

The code is as follows:

$empire->num("SQL语句")
$empire->num1($sql)

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Explanation:

The difference between the two is: num() writes SQL statements directly, while $sql in num1() is the result returned by query executing SQL.

Usage example:

The code is as follows:

$num=$empire->num("select id from {$dbtbpre}ecms_news");
echo"新闻表共有 ".$num." 条新闻";

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5. Statistical SQL query record number function 2: (a more efficient function compared to num)

The code is as follows:

$empire->gettotal("统计SQL语句");

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Explanation:
The difference between gettotal() and num() is: gettotal() uses SQL’s own count(*) function for statistics, while num() uses PHP’s own Function, gettotal() is more efficient.
The statistics in gettotal() must be as total, such as: "count(*) as total".

Usage example:

The code is as follows:

$num=$empire->gettotal("select count(*) as total from {$dbtbpre}ecms_news");
echo"新闻表共有 ".$num." 条新闻";

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6. Get the auto-increment ID value function just inserted into the table:

The code is as follows:

$empire->lastid()

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Usage example:

The code is as follows:

$empire->query("insert into {$dbtbpre}ecms_news(title) values('标题')");
$lastid=$empire->lastid();
echo"刚插入的信息ID为：".$lastid;

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7. Move the SQL query result record pointer:

The code is as follows:

$empire->seek($sql,$pit)

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Description:
$sql is the result returned by query executing SQL, and $pit is the offset number of the pointer.

Usage example:

The code is as follows:

$sql=$empire->query("select * from {$dbtbpre}ecms_news");
$empire->seek($sql,2);

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8. Release the SQL query result function: (Generally no need to use)

The code is as follows:

$empire->free($sql)

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Description:

$sql is the result returned by query executing SQL.

Usage example:

The code is as follows:

$sql=$empire->query("select * from {$dbtbpre}ecms_news");
$empire->free($sql);

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Navigation query example:

The code is as follows:

<DIV class=news_dh style="color:#000000"></p> <p><!--主栏目导航，此模板中直接指定为classid=69，即法律法规栏目-->
[e:loop={"select classid,classname,classpath from [!db.pre!]enewsclass where classid=&#39;69&#39; and showclass=0 order
 by myorder ",0,24,0}]
<span><a href="<?=$public_r[newsurl]?><?=$bqr[classpath]?>" ><?=$bqr[classname]?></a></span>   
<SPAN><IMG
src="[!--news.url--]skin/tx/zixun/images/index_line_nav.gif"></SPAN>
[/e:loop]</p> <p> </p> <p><!--子栏目导航-->
[e:loop={"select classid,classname,classpath from [!db.pre!]enewsclass where bclassid=&#39;69&#39; and showclass=0 order 
by myorder ",0,24,0}]
<?
$lanmuclass= "lanmu";
//echo $bqr[classid] ;
//echo "cur:".$GLOBALS[navclassid];
if ( $bqr[classid]==$GLOBALS[navclassid]) {
//echo "-";
$lanmuclass ="curlanmu";
}
?></p> <p><span class="<?=$lanmuclass?>"><a href="<?=$public_r[newsurl]?><?=$bqr[classpath]?>" >
<?=$bqr[classname]?></a></span>   <SPAN><IMG
src="[!--news.url--]skin/tx/zixun/images/index_line_nav.gif"></SPAN></p> <p>[/e:loop]</p> <p>
<!--新闻导航结束-->
</DIV>

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