澳门新葡萄京官网注册与数据库连接

4.据库连接
通过PHP你能够轻易的总是到数据库,央求数据并将其出示在您的web站点中,以至改良数据库中的数据。MySQL是一种非常红的数据库,况兼在网络中有众多有关PHP与MySQL的课程。MySQL是免费的,这点恐怕就引发了重重人。由于其广泛应用,小编就不想在这里边赘述MySQL的施用办法了。Oracle被大量在公司应用中央银行使,因而大家就使用Oracle来介绍PHP与数据库的接连。大家自然不会谈到Oracle数据库的思考原理,原因是那已经超先生过了小编们的座谈范围。
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函数更新遗闻越来越好一些。两个的施用语法大约工力悉敌。如前所述,你的PHP安装选项应该能够支撑相互的运用。
想得到越多关于在Microsoft
Windows平台上安装支撑PHP3的Apache服务器的文化以至愈来愈多关于Oracle数据库的知识,请查阅以下UCR-VL:~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(قطر‎; phpinfo(卡塔尔国; ?
以上代码应用TNSNAME定义的Oracle数据库名称、客商名称和密码连接数据库。在中标连接的基础上,ora_Logon函数重返叁个非零的连续几天ID并储存在变量$conn中。
4.2 查询
若是与数据库已经延续就绪,上面大家就来其实的使用对数据库的查询。下边包车型地铁代码演示了四个一连并询问的独立事例:
? /* * 连接数据库并实行查询 */ function printoraerr($in_cur卡塔尔 { //
检查Oracle是或不是出错 // 借使存在不当则显得 //
当指针被激活时每一次诉求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($conn卡塔尔国; echo “Logged off from oracle br”; ?
4.3 呈现结果 以下代码演示了怎么查询数据库并将结果输出: ? function
printoraerr($in_cur, $connState of Qatar { // 检查Oracle是或不是出错 //
若是存在不当则显得 // 当指针被激活时老是央浼Oracle后调用该函数 // If it
encountered an error, we exit immediately if(ora_errorcode($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;
$w_numcols=ora_numcols($cursor卡塔尔(قطر‎; // 显示底部 echo ” TABLE WIDTH=”百分百”
BOMuranoDELX570=”0″ CELLSPACING=”1″ CELLPADDING=”2″ TPAJERO”; 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($conn); ? 4.4 基于HTTP的Oracle登入将以下代码加在PHP页面代码在此以前以确认Oracle登陆。注意你必得正确设定$ 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; } } ?

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