愤怒的大鸟 发表于 2015-2-4 00:28:19

PHP编程:一个ORACLE分页法式

也或许是因为我还没有真正的学到深处吧,说实在的,PHP中的很多高级点的应用,如PHP类、PHP函数基本还是不懂吧!oracle|法式|分页   
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN">
<HTML>
<HEAD>
<TITLE>Paging Test</TITLE>
<META NAME="Generator" CONTENT="TextPad 4.0">
<META NAME="Author" CONTENT="?">
<META NAME="Keywords" CONTENT="?">
<META NAME="Description" CONTENT="?">
</HEAD>

<BODY BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#FF0000" VLINK="#800000" ALINK="#FF00FF" BACKGROUND="?">
<?php

// How to split the result into pages, like 'limits' in MySQL?
// ===========================================================
// Tutorial by Neil Craig (neilc@netactive.co.za)
// Date: 2001-06-05
// With this example, I will explain paging of database queries where the
// result is more than the developer want to print to the page, but wish to
// split the result into seperate pages.
// The table "SAMPLE_TABLE" accessed in this tutorial has 4 fields:
// PK_ID, FIELD1, FIELD2 and FIELD3. The types don't matter but you should
// define a primary key on the PK_ID field.

$display_rows = 5; // The rows that should be display at a time. You can
// modify this if you like.

// Connect to the Oracle database
putenv("ORACLE_SID=purk");
putenv("ORACLE_HOME=/export/oracle8i");
putenv("TNS_ADMIN=$ORACLE_HOME/network/admin");
$OracleDBConn = OCILogon("purk","purk","lengana.world");

// This query counts the records
$sql_count = "SELECT COUNT(*) FROM SAMPLE_TABLE";

// Parse the SQL string & execute it
$row_count=OCIParse($OracleDBConn, $sql_count);
OCIExecute($row_count);

// From the parsed & executed query, we get the amount of records found.
// I'm not storing this result into a session variable because it allows for
// new records to be shown as it is entered by another user while the result
// is printed.
if (OCIFetch($row_count)) {
$num_rows = OCIResult($row_count,1);
} else {
$num_rows = 0; // If no record was found
}

// Free the resources that were used for this query
OCIFreeStatement($row_count);

// We need to prepare the query that will print the results as a page. I will
// explain the query to you in detail.

// If no page was specified in the url (ex. http://mysite.com/result.php?page=2),
// set it to page 1.
if (empty($page) || $page == 0) {
$page = 1;
}

// The start range from where the results should be printed
$start_range = (($page - 1) * $display_rows) + 1;

// The end range to where the results should be printed
$end_range = $page * $display_rows;

// The main query. It consists of 3 "SELECT" statements nested into each
// other. The center query is the query you would normally use to return the
// records you want. Do you ordering and "WHERE" clauses in this statement.
// We select the rows to limit our results but because the row numbers are
// assigned to the rows before any ordering is done, lets the code print the
// result unsorted.
// The second nested "SELECTED" assigns the new row numbers to the result
// for us to select from.

$sql = "SELECT PK_ID, FIELD1, FIELD2, FIELD3, ROW_NO FROM (SELECT PK_ID, ";
$sql .= "FIELD1, FIELD2, FIELD3, ROWNUM ROW_NO FROM (SELECT PK_ID, FIELD1, ";
$sql .= "FIELD2, FIELD3 FROM SAMPLE_TABLE ORDER BY FIELD3)) WHERE ROW_NO BETWEEN ";
$sql .= $start_range." AND ".$end_range;

// start results formatting
echo "<table width='95%' border='1' cellspacing='1' cellpadding='2' align='center'>";
echo "<tr bgcolor='#666666'>";
echo "<td><b><font color='#FFFFFF'>PK ID</font></b></td>";
echo "<td><b><font color='#FFFFFF'>Field 1</font></b></td>";
echo "<td><b><font color='#FFFFFF'>Field 2</font></b></td>";
echo "<td><b><font color='#FFFFFF'>Field 3</font></b></td>";
echo "<td><b><font color='#FFFFFF'>Row No</font></b></td>";
echo "</tr>";

if ($num_rows != 0) {

// Parse the SQL string & execute it
$rs=OCIParse($OracleDBConn, $sql);
OCIExecute($rs);

// get number of columns for use later
$num_columns = OCINumCols($rs);

while (OCIFetch($rs)){
echo "<tr>";
for ($i = 1; $i < ($num_columns + 1); $i++) {
$column_value = OCIResult($rs,$i);
echo "<TD>$column_value</TD>";
}
echo "</tr>";
}

} else {

// Print a message stating that no records was found
echo "<tr><td align=center>Sorry! No records was found</td></tr>";
}

// Close the table
echo "</TABLE>";

// free resources and close connection
OCIFreeStatement($rs);
OCILogoff($OracleDBConn);

?>
<div align=center>
<?php

// Here we will print the links to the other pages

// Calculating the amount of pages
if ($num_rows % $display_rows == 0) {
$total_pages = $num_rows / $display_rows;
} else {
$total_pages = ($num_rows / $display_rows) + 1;
settype($total_pages, integer); // Rounding the variable
}

// If this is not the first page print a link to the previous page
if ($page != 1) {
echo "<a href='".$PHP_SELF."?page=".($page - 1)."'>Previous</a>";
}

// Now we can print the links to the other pages
for ($i = 1; $i <= $total_pages; $i++) {
if ($page == $i){
// Don't print the link to the current page
echo " ".$i;
} else {
//Print the links to the other pages
echo " <a href='".$PHP_SELF."?page=".$i."'>".$i."</a>";
}
}

// If this is not the last page print a link to the next page
if ($page < $total_pages) {
echo " <a href='".$PHP_SELF."?page=".($page + 1)."'>Next</a>";
}

?>
</div>
<?php

// I'm just adding this section to print some of the variables for extra info
// and some debugging

echo "<p><b>Total pages: </b>".$total_pages."</p>";
echo "<p><b>Number of records: </b>".$num_rows."</p>";
echo "<p><b>The SQL Query is:</b> ".$sql."</p>";

?>
</BODY>
</HTML>


熟悉HTML/CSS/JS等网页基本元素,完成阶段可自行制作完整的网页,对元素属性达到熟悉程度

飘灵儿 发表于 2015-2-4 13:10:39

php是动态网站开发的优秀语言,在学习的时候万万不能冒进。在系统的学习前,我认为不应该只是追求实现某种效果,因为即使你复制他人的代码调试成功,实现了你所期望的效果,你也不了解其中的原理。

变相怪杰 发表于 2015-2-5 22:02:23

其实没啥难的,多练习,练习写程序,真正的实践比看100遍都有用。不过要熟悉引擎

再见西城 发表于 2015-2-13 19:51:53

最后介绍一个代码出错,但是老找不到错误方法,就是 go to wc (囧),出去换换气没准回来就找到错误啦。

admin 发表于 2015-2-25 15:21:44

作为一个合格的coder 编码的规范是必须,命名方面我推崇“驼峰法”,另外就是自己写的代码最好要带注释,不然时间长了,就算是自己的代码估计看起来都费事,更不用说别人拉。

老尸 发表于 2015-3-7 22:48:50

说php的话,首先得提一下数组,开始的时候我是最烦数组的,总是被弄的晕头转向,不过后来呢,我觉得数组里php里最强大的存储方法,所以建议新手们要学好数组。

乐观 发表于 2015-3-8 07:17:44

首先我是坚决反对新手上来就用框架的,因为对底层的东西一点都不了解,造成知识上的真空,会对以后的发展不利。我的观点上手了解下框架就好,代码还是手写。当然啦如果是位别的编程语言的高手的话,这个就另当别论啦。

仓酷云 发表于 2015-3-8 17:40:50

因为blog这样的可以让你接触更多要学的知识,可以接触用到类,模板,js ,ajax

深爱那片海 发表于 2015-3-13 02:07:19

做为1门年轻的语言,php一直很努力。

简单生活 发表于 2015-3-15 23:44:23

在学习的过程中不能怕麻烦,不能有懒惰的思想。学习php首先应该搭建一个lamp环境或者是wamp环境。这是学习php开发的根本。虽然网络上有很多集成的环境,安装很方便,使用起来也很稳定、

不帅 发表于 2015-3-22 18:07:18

至于模板嘛,各位高人一直以来就是争论不休,我一只小菜鸟就不加入战团啦,咱们新手还是多学点东西的好。

灵魂腐蚀 发表于 2015-3-27 00:49:34

作为一个合格的coder 编码的规范是必须,命名方面我推崇“驼峰法”,另外就是自己写的代码最好要带注释,不然时间长了,就算是自己的代码估计看起来都费事,更不用说别人拉。

蒙在股里 发表于 2015-4-3 03:28:00

我还是推荐用firefox ,配上firebug 插件调试js能省下不受时间。谷歌的浏览器最好也不少用,因为谷歌的大侠们实在是太天才啦,把一些原来的js代码加了一些特效。

透明 发表于 2015-4-6 11:55:09

在我安装pear包的时候老是提示,缺少某某文件,才发现 那群extension 的排列是应该有一点的顺序,而我安装的版本的排序不是正常的排序。没办法我只好把那群冒号加了上去,只留下我需要使用的扩展。

冷月葬花魂 发表于 2015-4-12 16:26:39

首推的搜索引擎当然是Google大神,其次我比较喜欢 百度知道。不过搜出来的结果往往都是 大家copy来copy去的,运气的的概率很大。

兰色精灵 发表于 2015-4-13 05:52:27

环境搭建好,当你看见你的浏览器输出“it works\\\\\\\"时你一定是喜悦的。在你解决问题的时候,我强烈建议多读php手册。

爱飞 发表于 2015-4-26 13:10:55

开发工具也会慢慢的更专业,每个公司的可能不一样,但是zend studio是个大伙都会用的。

若天明 发表于 2015-4-30 20:28:53

装在C盘下面可以利用windows的ghost功能可以还原回来(顺便当做是重转啦),当然啦我的编译目录要放在别的盘下,不然自己的劳动成果就悲剧啦。

小魔女 发表于 2015-5-1 10:08:28

说点我烦的低级错误吧,曾经有次插入mysql的时间 弄了300年结果老报错,其实mysql的时间是有限制的,大概是到203X年具体的记不清啦,囧。

柔情似水 发表于 2015-5-1 12:10:22

如果你可以写完像留言板这样的程序,那么你可以去一些别人的代码了,
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