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php提供了两套函数与Oracle连接，分别是ORA_和OCI函数。其中ORA_函数略显陈旧。OCI函数更新据说更好一些。两者的使用语法几乎相差无几。你的php安装选项应该可以支持两者的使用。
连接
< ? if ($conn=Ora_Logon("user@TNSNAME","password"))
{ echo "SUCCESS ! Connected to database/n";
}else
{echo "Failed :-( Could not connect to database/n";}
Ora_Logoff($conn);
phpinfo();
?>
以上代码使用TNSNAME（在你的tnsnames.ora文件中指明）定义的Oracle数据库名称、用户名称和密码连接数据库。在成功连接的基础上，ora_logon函数返回一个非零的连接ID并储存在变量$conn中。
查询
假设与数据库已经连接就绪，下面我们就来实际的应用对数据库的查询。下面的代码演示了一个连接并查询的典型例子：
function printoraerr($in_cur)
{
// 检查Oracle是否出错
// 如果存在错误则显示
// 当指针被激活时每次请求Oracle后调用该函数
if(ora_errorcode($in_cur))
echo "Oracle code - ".ora_error($in_cur)."/n";
return;
}
if (!($conn=ora_logon("user@TNSNAME","password")))
{echo "Connection to database failed/n";
exit;
}
echo "Connected as connection - $conn /n";
echo "Opening cursor ... /n";
$cursor=ora_open($conn); printoraerr($cursor);
echo "Opened cursor - $cursor /n";
$qry="select user,sysdate from dual";
echo "Parsing the query $qry ... /n";
ora_parse($cursor,$qry,0); printoraerr($cursor);
echo "Query parsed /n";
echo "Executing cursor ... /n";
ora_exec($cursor); printoraerr($cursor);
echo "Executed cursor /n";
echo "Fetching cursor ... /n";
while(ora_fetch($cursor))
{
$user=ora_getcolumn($cursor,0); printoraerr($cursor);
$sysdate=ora_getcolumn($cursor,1); printoraerr($cursor);
echo " row = $user, $sysdate /n";
}
echo "Fetched all records /n";
echo "Closing cursor ... /n";
ora_close($cursor);
echo "Closed cursor /n";
echo "Logging off from oracle... /n";
ora_logoff($conn);
echo "Logged off from oracle /n";
?>
显示结果
以下代码演示了怎样查询数据库并将结果输出：
function printoraerr($in_cur, $conn)
{
// 检查Oracle是否出错
// 如果存在错误则显示
// 当指针被激活时每次请求Oracle后调用该函数
// If it encountered an error, we exit immediately
if(ora_errorcode($in_cur))
{echo "Oracle code - ".ora_error($in_cur)." n";
ora_logoff($conn);
exit;
}
return;
}
function exequery($w_qry,$conn)
{
$cursor=ora_open($conn); printoraerr($cursor,$conn);
ora_parse($cursor,$w_qry,0); printoraerr($cursor,$conn);
ora_exec($cursor); printoraerr($cursor,$conn);
$numrows=0;
$w_numcols=ora_numcols($cursor);
// 显示头部
echo " /n";
for ($i=0;$i<$w_numcols;$i++)
{
$align=(ora_columntype($cursor,$i)=="NUMBER")?"RIGHT":"LEFT";
echo "/t ".ora_columnname($cursor,$i)." /n";
}
echo " /n";
while(ora_fetch($cursor))
{
echo " /n";
for ($i=0;$i<$w_numcols;$i++)
{
$align=(ora_columntype($cursor,$i)=="NUMBER")?"RIGHT":"LEFT";
if(ora_columntype($cursor,$i)=="LONG")
echo " ".
ora_getcolumn($cursor,$i)." /n";
else
echo " ".ora_getcolumn($cursor,$i)." /n";
printoraerr($cursor,$conn);
}
$numrows++;
echo " /n";
}
if ($numrows==0)
echo " Query returned no records /n";
else
{
echo " /n";
echo " Count /n";
echo " $numrows /n";
echo " /n";
}
echo " /n";
ora_close($cursor);
return;
}
// 主程序
if(!($conn=ora_logon("user@SID","password")))
{
echo "Error: Cannot connect to database/n";
exit;
}
$qry="SELECT
deptno /"Dept/"
,empno /"Emp/"
,empnm /"Name/"
,salary /"Salary/"
FROM
employee
ORDER BY 1,2";
exequery($qry);
ora_logoff($conn);
?>
基于HTTP的Oracle登录
将以下代码加在php页面代码之前以确认Oracle登录。注意你必须正确设定$ SID。
if(!isset($php_AUTH_USER))
{
Header("WWW-authenticate: basic realm=/"$SID/"");
Header("HTTP/1.0 401 Unauthorized");
$title="Login Instructions";
echo "
You are not authorized to enter the site
/n";
exit;
}
else
{
if (!($conn=ora_logon("$php_AUTH_USER@$SID",$php_AUTH_PW)))
{Header("WWW-authenticate: basic realm=/"$SID/"");
Header("HTTP/1.0 401 Unauthorized");
$title="Login Instructions";
echo "
You are not authorised to enter the site
/n";
exit;
}}
?>
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