说明：代码来源《PHP和MySQL Web应用开发》一书，还有就是代码有些是经过修改的，经过我的测验全部都可以用
这是数据库部分代码
//创建数据库 create database MySQLDB; //使用数据库 use mysqldb; //向数据库中插入表格 create table Employees(EmpName varchar(50) primary key,DepName varchar(50),Salary integer); //修改列名 alter table employees change column DepName Title varchar(50); //增加列 alter table employees add column DepName varchar(50); //向表格插入数据 insert into Employees values(‘张三‘,‘部门经理‘,6000,‘人事部‘); //插入出错，在插入前加set names gbk; 就ok了；http://www.cnblogs.com/sunzn/archive/2013/03/14/2960248.html //错误提示,Incorrect string value:"\XX \XX \XX \XX \XX"for column ‘XXX‘ at row 1 ALTER DATABASE database_name CHARACTER SET GBK;(修改database) ALTER DATABASE mysqldb CHARACTER SET GBK; //不可行 insert into Employees values(‘李四‘,‘职员‘,3000,‘人事部‘); insert into Employees values(‘王五‘,‘职员‘,3500,‘服务部‘); insert into Employees values(‘赵六‘,‘部门经理‘,6500,‘开发部‘); insert into Employees values(‘高七‘,‘职员‘,2500,‘开发部‘); insert into Employees values(‘马八‘,‘职员‘,3100,‘人事部‘); insert into Employees values(‘钱九‘,‘部门经理‘,5000,‘财务部‘); insert into Employees values(‘孙十‘,‘职员‘,2800,‘财务部‘); 删除列：alter table 表名 drop column 列名;
CreateTable.php 使用php在MySQL中创建表
<?PHP
//创建数据库之后用这代码去创建表users
$conn = mysqli_connect("localhost", "root", "123456", "MySQLDB");
if (empty($conn)) {
die("mysqli_connect failed: " . mysqli_connect_error());
}
//执行CREATE TABLE 语句
$sql = "CREATE TABLE IF NOT EXISTS Users (UserName VARCHAR(50) PRIMARY KEY, UserPwd VARCHAR(50), ShowName VARCHAR(50))";
$conn->query($sql);
// 关闭连接
mysqli_close($conn);
?>
FetchData.php 在网页中显示MySQL数据库中表的内容示例
<meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″>
<?PHP
$conn = mysqli_connect("localhost", "root", "123456", "MySQLDB");
if (empty($conn)) {
die("mysqli_connect failed: " . mysqli_connect_error());
}
mysqli_query($conn, "SET NAMES utf8");
// 查询Employees中的员工数据
$sql = "SELECT EmpName, Title, Salary FROM Employees";
$results = $conn->query($sql);
// 循环处理结果集中的记录
while($row = $results->fetch_row()) {
print($row[0] . " " . $row[1] . " " . $row[2] . "<BR>");
}
$results->free();
// 关闭连接
mysqli_close($conn);
/*
乱码问题：
加 <meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″> 和 mysqli_query($conn, "SET NAMES utf8");
来统一编码，from:http://jingyan.baidu.com/article/77b8dc7fcae06e6174eab6ba.html
*/
?>
multi-query.php 使用$conn->multi_query()函数同时执行两个select语句的示例
<meta http-equiv=”Content-Type” content=”text/html; charset=utf-8″>
<?php
$conn = mysqli_connect("localhost", "root", "123456", "MySQLDB");
if (empty($conn)) {
die("mysqli_connect failed: " . mysqli_connect_error());
}
mysqli_query($conn, "SET NAMES utf8");
$query = "SELECT EmpName FROM Employees;";
$query .= " SELECT DepName FROM Departments;";
if ($conn->multi_query($query)) {
do {
if ($result = $conn->store_result()) {
while ($row = $result->fetch_row()) {
echo($row[0] . "<br>");
}
$result->close();
}
} while ($conn->next_result());
}
$conn->close();
/*
使用multi_query()函数同时执行两个select语句，分别查询员工姓名和部门名称
*/
?>
viewPage.php php分页显示MySQL数据中表记录的代码示例
<HTML>
<HEAD><TITLE>分页显示记录</TITLE>
<meta http-equiv="Content-Type" content="text/html; charset=utf8" />
</HEAD>
<BODY>
<?PHP
// 获取当前页码
$page = $_GET[‘page‘];
if($page == 0)
$page = 1;
$PageSize = 3; // 为了演示分页效果，
// 连接到数据库
$conn = mysqli_connect("localhost", "root", "123456", "MySQLDB");
if (empty($conn)) {
die("mysqli_connect failed: " . mysqli_connect_error());
}
// 设置中文字符集
mysqli_query($conn, "SET NAMES utf8");
//执行SELECT 语句，获取表Employees的记录总数
$sql = "SELECT COUNT(1) FROM Employees";
$results = $conn->query($sql);
$row = $results->fetch_row();
$RecordCount = $row[0];
//////////////
// 计算总页数//
/////////////
if( $RecordCount ){
//如果记录总数量小于每页显示的记录数量，则只有一页
if( $RecordCount < $PageSize ){
$PageCount = 1;
}
//取记录总数量不能整除每页显示记录的数量，则页数等于总记录数量除以每页显示记录数量的结果取整再加1
if( $RecordCount % $PageSize ){
$PageCount = (int)($RecordCount / $PageSize) + 1;
}
else { //如果没有余数，则页数等于总记录数量除以每页显示记录的数量
$PageCount = $RecordCount / $PageSize;
}
}
else{ // 如果结果集中没有记录，则页数为0
$PageCount = 0;
}
echo("<BR>当前页码 :" . $page . "/" . $PageCount);
?>
<table width="449" border="1">
<tr>
<td>员工姓名</td>
<td>职务</td>
<td>工资</td>
</tr>
<?PHP
// 循环显示当前页的记录
$sql = "SELECT EmpName, Title, Salary FROM Employees LIMIT " . ($page-1) * $PageSize . "," . $PageSize;
$results = $conn->query($sql);
while($row = $results->fetch_row()) {
echo("<tr>");
echo("<td>" . $row[0] . " </td>");
echo("<td>" . $row[1] . " </td>");
echo("<td>" . $row[2] . " </td>");
echo("</tr>");
}
// 关闭连接
mysqli_close($conn);
// 显示分页链接
if($page == 1)
echo("第一页 ");
else
echo(" <a href=viewPage.php?page=1>第一页</a> ");
// 设置“上一页”链接
if($page == 1)
echo(" 上一页 ");
else
echo(" <a href=viewPage.php?page=" . ($page-1) . ">上一页</a> ");
// 设置“下一页”链接
if($page == $PageCount)
echo(" 下一页 ");
else
echo(" <a href=viewPage.php?page=" . ($page+1) . ">下一页</a> ");
//设置“最后一页”链接
if($page == $PageCount)
echo(" 最后一页 ");
else
echo(" <a href=viewPage.php?page=" . $PageCount . ">最后一页</a> ")
?>
</table>
</BODY>
</HTML>
截图：
时间： 2024-10-20 12:15:22