PHP网站制作之一个ORACLE分页法式，挺适用的.
PHP于1994年由Rasmus Lerdorf创建，刚刚开始是Rasmus Lerdorf为了要维护个人网页而制作的一个简单的用Perl语言编写的程序。 <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2 Final//EN"><HTML>
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<TITLE>Paging Test</TITLE>
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// 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);
?>
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<?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>";
?>
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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 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。 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。 Apache不是非得用80或者8080端口的，我刚开始安得时候就是80端口老占用，就用了个 81端口，结果照常，就是输localhost的时候，应该输入为 localhost:81 本文当是我的笔记啦，遇到的问题随时填充 实践是检验自己会不会的真理。 有时候汉字的空格也能导致页面出错，所以在写代码的时候，要输入空格最好用引文模式。 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， 本文当是我的笔记啦，遇到的问题随时填充 对于初学者来说不推荐去拿钱买的。当然如果一个网站你经常去用，而且里面的资料也比较有用，最好还是买个会员比较好，毕竟那些也是别人的工作成果。 基础有没有对学习php没有太大区别，关键是兴趣。 本文当是我的笔记啦，遇到的问题随时填充 找到的的资料很多都是在论坛里的，需要注册，所以我一般没到一个论坛都注册一个id，所有的id都注册成一样的，这样下次再进来的时候就不用重复注册啦。当然有些论坛的某些资料是需要的付费的。 首先声明：我是一个菜鸟，是一个初学者。学习了一段php后总是感觉自己没有提高，无奈。经过反思我认为我学习过程中存在很多问题，我改变了学习方法后自我感觉有了明显的进步。 微软最近出的新字体“微软雅黑”，虽然是挺漂亮的，不过firefox支持的不是很好，所以能少用还是少用的好。 首先声明：我是一个菜鸟，是一个初学者。学习了一段php后总是感觉自己没有提高，无奈。经过反思我认为我学习过程中存在很多问题，我改变了学习方法后自我感觉有了明显的进步。 再就是混迹于论坛啦，咱们的phpchina的论坛就很强大，提出的问题一般都是有达人去解答的，以前的帖子也要多看看也能学到不少前辈们的经验。别的不错的论坛例如php100，javaeye也是很不错的。 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 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。 Ps：以上纯属原创，如有雷同，纯属巧合
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