澳门新葡亰平台游戏网站PHP新手上路

4.据库连接
通过PHP你能够轻便的连续到数据库,要求数据并将其出示在您的web站点中,以至改革数据库中的数据。MySQL是一种非常红的数据库,并且在网络中有超级多有关PHP与MySQL的学科。MySQL是无需付费的,这点可能就抓住了好多少人。由于其布满应用,作者就不想在那处赘述MySQL的行使办法了。Oracle被大批量在公司应用中采纳,由此我们就利用Oracle来介绍PHP与数据库的接连几天。大家当然不会聊起Oracle数据库的宏图原理,原因是那早已不仅了笔者们的座谈范围。
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函数更新据说越来越好有的。两个的行使语法大约双管齐下。如前所述,你的PHP安装选项应该能够帮助双方的使用。
想获得更加多关于在Microsoft
Windows平台上设置支撑PHP3的Apache服务器的学识以至越来越多关于Oracle数据库的学识,请查阅以下UEvoqueL:~vsbabu/articles/oraphp.html。
4.1 连接 ? if ($conn=Ora_Logon(“user@TNSNAME”,”password”)) { echo
“BSUCCESS ! Connected to databaseB”; } else { echo “BFailed 🙁 Could
not connect to databaseB”; } Ora_Logoff($conn卡塔尔; phpinfo(卡塔尔(قطر‎; ?
以上代码应用TNSNAME定义的Oracle数据库名称、用户名称和密码连接数据库。在名利双收连接的底子上,ora_Logon函数再次回到二个非零的总是ID并积累在变量$conn中。
4.2 查询
即便与数据库已经再三再四就绪,下边大家就来实在的利用对数据库的查询。上边包车型大巴代码演示了叁个连连并询问的卓著例证:
? /* * 连接数据库并试行查询 */ function printoraerr($in_curState of Qatar { //
检查Oracle是还是不是出错 // 借使存在错误则彰显 //
当指针被激活时老是乞求Oracle后调用该函数 if(ora_errorcode($in_cur))
echo “Oracle code – “.ora_error($in_cur).””; return; } /** 主程序
*/ if (!($conn=ora_Logon(“user@TNSNAME”,”password”))) { echo
“Connection to database failed”; exit; } echo “Connected as connection –
b$conn/bbr”; echo “Opening cursor …br”; $cursor=ora_open($conn);
printoraerr($cursor); echo “Opened cursor – b$cursor/bbr”; $qry=”select
user,sysdate from dual”; echo “Parsing the query b$qry/b …br”;
ora_parse($cursor,$qry,0); printoraerr($cursor); echo “Query parsed
br”; echo “Executing cursor …br”; ora_exec($cursor);
printoraerr($cursor); echo “Executed cursorbr”; echo “Fetching cursor
…br”; while(ora_fetch($cursor)) { $user=ora_getcolumn($cursor,0);
printoraerr($cursor); $sysdate=ora_getcolumn($cursor,1);
printoraerr($cursor); echo ” row = B$user, $sysdate /Bbr”; } echo
“Fetched all recordsbr”; echo “Closing cursor …br”;
ora_close($cursor); echo “Closed cursorbr”; echo “Logging off from
oracle… br”; ora_Logoff($conn卡塔尔; echo “Logged off from oracle br”; ?
4.3 展现结果 以下代码演示了什么查询数据库并将结果输出: ? function
printoraerr($in_cur, $connState of Qatar { // 检查Oracle是或不是出错 //
假设存在错误则显示 // 当指针被激活时老是诉求Oracle后调用该函数 // If it
encountered an error, we exit immediately if(ora_errorcode($in_cur)) {
echo “Oracle code – “.ora_error($in_cur).”brn”; ora_Logoff($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;
$w_numcols=ora_numcols($cursorState of Qatar; // 展现底部 echo ” TABLE WIDTH=”100%”
BOTucsonDE奥迪Q3=”0″ CELLSPACING=”1″ CELLPADDING=”2″ T奥德赛”; for
($i=0;$i$w_numcols;$i++) {
$align=(ora_columntype($cursor,$i)==”NUMBER”)?”RIGHT”:”LEFT”; echo “TH
VALIGN=TOP ALIGN=$align”.ora_columnname($cursor,$i).”/TH”; } echo
“/TR”; while(ora_fetch($cursor)) { echo “TR”; for
($i=0;$i$w_numcols;$i++) {
$align=(ora_columntype($cursor,$i)==”NUMBER”)?”RIGHT”:”LEFT”;
if(ora_columntype($cursor,$i)==”LONG”) echo “TD VALIGN=TOP
ALIGN=$alignPRE”. ora_getcolumn($cursor,$i).”/PRE/TD”; else echo “TD
VALIGN=TOP ALIGN=$align”.ora_getcolumn($cursor,$i).”/TD”;
printoraerr($cursor,$conn); } $numrows++; echo “/TR”; } if ($numrows==0)
echo “TRTD COLSPAN=”$w_numcols”BQuery returned no records /B/TD/TR”;
else { echo “TR”; echo “TH COLSPAN=””.($w_numcols-1).””
ALIGN=RIGHTCount/TH”; echo “TH ALIGN=RIGHT$numrows/TH”; echo “/TR”; }
echo “/TABLE”; ora_close($cursor); return; } // 主程序
if(!($conn=ora_Logon(“user@SID”,”password”))) { echo “Error: Cannot
connect to database”; exit; } $qry=”SELECT deptno “Dept” ,empno “Emp”
,empnm “Name” ,salary “Salary” FROM employee ORDER BY 1,2″;
exequery($qry); ora_Logoff($connState of Qatar; ? 4.4 基于HTTP的Oracle登入将以下代码加在PHP页面代码在此以前以确认Oracle登入。注意你必须正确设定$ SID。
? if(!isset($PHP_AUTH_USER)) { Header(“WWW-authenticate: basic
realm=”$SID””); Header(“HTTP/1.0 401 Unauthorized”); $title=”Login
Instructions”; echo “blockquote You are not authorized to enter the site
/blockquote “; exit; } else { if
(!($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 “blockquote You are
not authorised to enter the site /blockquote “; exit; } } ?

使用PHP来操作Oracle数据库

  1. 数据库连接

  在上一节里,我们曾经介绍了PHP与MySQL数据库的一对基本操作知识,在互连网中有关PHP与MySQL的教程也最多。MySQL是免费的,那点大概就吸引了广大人。由于其遍布应用,小编就不想在那间赘述MySQL的利用方法了。Oracle被大量在公司应用中选用,因而大家就利用Oracle来一发介绍PHP与数据库的接连几天。我们当然不会聊到Oracle数据库的宏图原理,原因是那早已超过了笔者们的座谈范围。

  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函数更新据书上说越来越好一些。两个的应用语法差不离相差无几。如前所述,你的PHP安装选项应该可以支撑两岸的选取。
  想获取越来越多关于在Microsoft
Windows平台上安装支撑PHP3的Apache服务器的知识以致越多关于Oracle数据库的学问,请查阅以下UEscortL:www.csoft.net/~vsbabu/articles/oraphp.html。  

11.1 连接

<?  
if ($conn=Ora_Logon(“user@TNSNAME”,”password”))  
{
echo “<B>SUCCESS ! Connected to database<B>n”;
}  
else  
{
echo “<B>Failed 🙁 Could not connect to database<B>n”;
}
Ora_Logoff($conn);
phpinfo();
?>
如上代码应用TNSNAME(在你的tnsnames.ora文件中指明)定义的Oracle数据库名称、顾客名称和密码连接数据库。在成功连接的功底上,ora_logon函数重返三个非零的接连ID并储存在变量$conn中。

11.2 查询

假如与数据库已经一连就绪,上边大家就来实在的应用对数据库的查询。下边包车型大巴代码演示了二个老是并询问的独立例证:
<?
/*
* 连接数据库并试行查询
*/
function printoraerr($in_cur)
{
// 检查Oracle是不是出错
// 假设存在错误则展现
// 当指针被激活时老是央求Oracle后调用该函数
if(ora_errorcode($in_cur))
echo “Oracle code – “.ora_error($in_cur).”n”;
return;
}
/** 主程序 */
if (!($conn=ora_logon(“user@TNSNAME”,”password”)))  
{
echo “Connection to database failedn”;
exit;
}
echo “Connected as connection – <b>$conn</b><br>n”;
echo “Opening cursor …<br>n”;
$cursor=ora_open($conn); printoraerr($cursor);
echo “Opened cursor – <b>$cursor</b><br>n”;
$qry=”select user,sysdate from dual”;
echo “Parsing the query <b>$qry</b> …<br>n”;
ora_parse($cursor,$qry,0); printoraerr($cursor);
echo “Query parsed <br>n”;
echo “Executing cursor …<br>n”;
ora_exec($cursor); printoraerr($cursor);
echo “Executed cursor<br>n”;
echo “Fetching cursor …<br>n”;
while(ora_fetch($cursor))
{
$user=ora_getcolumn($cursor,0); printoraerr($cursor);
$sysdate=ora_getcolumn($cursor,1); printoraerr($cursor);
echo ” row = <B>$user, $sysdate </B><br>n”;
}
echo “Fetched all records<br>n”;
echo “Closing cursor …<br>n”;
ora_close($cursor);
echo “Closed cursor<br>n”;
echo “Logging off from oracle… <br>n”;
ora_logoff($conn);
echo “Logged off from oracle <br>n”;
?>
(译者注:以上代码段贫乏注释,请读者参谋PHP
Manual的Oracle数据库函数部分)

11.3 显示结果

以下代码演示了什么样查询数据库并将结果输出:
<?
function printoraerr($in_cur, $conn)
{
// 检查Oracle是或不是出错
// 如若存在错误则显示
// 当指针被激活时老是要求Oracle后调用该函数
// If it encountered an error, we exit immediately
if(ora_errorcode($in_cur))  
{
echo “Oracle code – “.ora_error($in_cur).”<br>n”;
ora_logoff($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);
// 呈现底部
echo “
<TABLE WIDTH=”100%” BORDER=”0″ CELLSPACING=”1″ CELLPADDING=”2″>
<TR>n”;
for ($i=0;$i<$w_numcols;$i++)
{
$align=(ora_columntype($cursor,$i)==”NUMBER”)?”RIGHT”:”LEFT”;
echo “t<TH VALIGN=TOP
ALIGN=$align>”.ora_columnname($cursor,$i).”</TH>n”;
}
echo “</TR>n”;
while(ora_fetch($cursor))
{
echo “<TR>n”;
for ($i=0;$i<$w_numcols;$i++)  
{
$align=(ora_columntype($cursor,$i)==”NUMBER”)?”RIGHT”:”LEFT”;
if(ora_columntype($cursor,$i)==”LONG”)
echo “<TD VALIGN=TOP ALIGN=$align><PRE>”.
ora_getcolumn($cursor,$i).”</PRE></TD>n”;
else
echo “<TD VALIGN=TOP
ALIGN=$align>”.ora_getcolumn($cursor,$i).”</TD>n”;
printoraerr($cursor,$conn);
}
$numrows++;
echo “</TR>n”;
}
if ($numrows==0)
echo “<TR><TD COLSPAN=”$w_numcols”><B>Query returned
no records
</B></TD></TR>n”;
else  
{
echo “<TR>n”;
echo “<TH COLSPAN=””.($w_numcols-1).””
ALIGN=RIGHT>Count</TH>n”;
echo “<TH ALIGN=RIGHT>$numrows</TH>n”;
echo “</TR>n”;
}
echo “</TABLE>n”;
ora_close($cursor);
return;
}

// 主程序
if(!($conn=ora_logon(“user@SID”,”password”)))  
{
echo “Error: Cannot connect to databasen”;
exit;
}
$qry=”SELECT
deptno “Dept”
,empno “Emp”
,empnm “Name”
,salary “Salary”
FROM
employee
ORDER BY 1,2″;
exequery($qry);
ora_logoff($conn);
?>
(译者注:以上代码段贫乏注释,请读者参考PHP
Manual的Oracle数据库函数部分)

11.4 基于HTTP的Oracle登录

将以下代码加在PHP页面代码从前以确认Oracle登陆。注意你必需正确设定$
SID。
<?  
if(!isset($PHP_AUTH_USER))  
{
Header(“WWW-authenticate: basic realm=”$SID””);
Header(“HTTP/1.0 401 Unauthorized”);
$title=”Login Instructions”;
echo “<blockquote>
You are not authorized to enter the site
</blockquote> n”;
exit;
}  
else  
{
if (!($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 “<blockquote>
You are not authorised to enter the site
</blockquote> n”;
exit;
}
}
?>   

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