杜老师,16章一个问题一个例子报错,请回答
时间:2008-03-24
来源:互联网
先说一下,您第16章php和mysql接口,写的不错
3,修改记录报错,您看一下
<?
if (isset($_POST['btnModify'])){
//验证表单省略
$sql="update animl set where id='$_POST[id]'";
$result= mysqli_query($sql);
if($result){
echo"修改成功";
}else{
echo "修改失败";
}
}
//查询当前记录
$query= "select*from syt";
//执行查询
if ($result = $mysqli->query($query)) {
//显示返回记录行数
if($rseult->num_rows>0){
//如果有记录,显示记录内容
echo "<table border=1 >";
while($row= $result->fetch_array()) {
echo "<tr>";
echo "<td><input name='id' type='text' id='id' vaule='row[0]' /><td>";
echo "<td><input name='country' type='text' id='county' vaule='row[1]' /><td>";
echo "<td><input name='animal' type='text' id='animal' vaule='row[2]' /><td>";
echo "<td><input name='btnmodify' type='submit' id='btnModify' vaule='修改' /><td>";
echo "</trr>";
}
}
$result->close();
}
?>
报这个错误,什么原因
Fatal error: Call to a member function query() on a non-object in D:\www\phpjichu\mysql\mody.php on line 30
3,修改记录报错,您看一下
<?
if (isset($_POST['btnModify'])){
//验证表单省略
$sql="update animl set where id='$_POST[id]'";
$result= mysqli_query($sql);
if($result){
echo"修改成功";
}else{
echo "修改失败";
}
}
//查询当前记录
$query= "select*from syt";
//执行查询
if ($result = $mysqli->query($query)) {
//显示返回记录行数
if($rseult->num_rows>0){
//如果有记录,显示记录内容
echo "<table border=1 >";
while($row= $result->fetch_array()) {
echo "<tr>";
echo "<td><input name='id' type='text' id='id' vaule='row[0]' /><td>";
echo "<td><input name='country' type='text' id='county' vaule='row[1]' /><td>";
echo "<td><input name='animal' type='text' id='animal' vaule='row[2]' /><td>";
echo "<td><input name='btnmodify' type='submit' id='btnModify' vaule='修改' /><td>";
echo "</trr>";
}
}
$result->close();
}
?>
报这个错误,什么原因
Fatal error: Call to a member function query() on a non-object in D:\www\phpjichu\mysql\mody.php on line 30
作者: 山日比 发布时间: 2008-03-23
请确认php.ini中mysqli.so或mysqli.dll选项是否打开。
作者: phpcast 发布时间: 2008-03-24
如果确认打开。
请确认$mysqli这个对象是否创建,格式如下:
$mysqli = new mysqli("localhost", "my_user", "my_password", "animal");
请确认$mysqli这个对象是否创建,格式如下:
$mysqli = new mysqli("localhost", "my_user", "my_password", "animal");
作者: phpcast 发布时间: 2008-03-24
谢谢您回复,我创建对象了,你看一下,还是不行啊
<?php
/**************************
@Filename: filename.php
@Version : 0.0.1
@Author : leo
@Update : 2007-11-01
@Content : PHP by Editplus
**************************/
//数据库参数
$host="localhost";
$user="root";
$pass="root";
$db="we";
//创建mysqli对象,打开数据库
$mysqli=new mysqli($hodt,$user,$pass,$db);
if (isset($_POST['btnModify'])){
//验证表单省略
$sql="update animl set where id='$_POST[id]'";
$result= mysqli_query($sql);
if($result){
echo"修改成功";
}else{
echo "修改失败";
}
}
//查询当前记录
$query= "select*from syt";
//执行查询
if ($result = $mysqli->query($query)) {
//显示返回记录行数
if($rseult->num_rows>0){
//如果有记录,显示记录内容
echo "<table border=1 >";
while($row= $result->fetch_array()) {
echo "<tr>";
echo "<td><input name='id' type='text' id='id' vaule='row[0]' /><td>";
echo "<td><input name='country' type='text' id='county' vaule='row[1]' /><td>";
echo "<td><input name='animal' type='text' id='animal' vaule='row[2]' /><td>";
echo "<td><input name='btnmodify' type='submit' id='btnModify' vaule='修改' /><td>";
echo "</trr>";
}
}
$result->close();
}
?>
<?php
/**************************
@Filename: filename.php
@Version : 0.0.1
@Author : leo
@Update : 2007-11-01
@Content : PHP by Editplus
**************************/
//数据库参数
$host="localhost";
$user="root";
$pass="root";
$db="we";
//创建mysqli对象,打开数据库
$mysqli=new mysqli($hodt,$user,$pass,$db);
if (isset($_POST['btnModify'])){
//验证表单省略
$sql="update animl set where id='$_POST[id]'";
$result= mysqli_query($sql);
if($result){
echo"修改成功";
}else{
echo "修改失败";
}
}
//查询当前记录
$query= "select*from syt";
//执行查询
if ($result = $mysqli->query($query)) {
//显示返回记录行数
if($rseult->num_rows>0){
//如果有记录,显示记录内容
echo "<table border=1 >";
while($row= $result->fetch_array()) {
echo "<tr>";
echo "<td><input name='id' type='text' id='id' vaule='row[0]' /><td>";
echo "<td><input name='country' type='text' id='county' vaule='row[1]' /><td>";
echo "<td><input name='animal' type='text' id='animal' vaule='row[2]' /><td>";
echo "<td><input name='btnmodify' type='submit' id='btnModify' vaule='修改' /><td>";
echo "</trr>";
}
}
$result->close();
}
?>
作者: 山日比 发布时间: 2008-03-24
复制PHP内容到剪贴板
<?php
// set server access variables
$host = "localhost";
$user = "root";
$pass = "root";
$db = "testdb";
// create mysqli object
// open connection
$mysqli = new mysqli($host, $user, $pass, $db);
// check for connection errors
if (mysqli_connect_errno()) {
die("Unable to connect!");
}
// if id provided, then delete that record
if (isset($_REQUEST['id'])) {
// create query to delete record
$query = "DELETE FROM symbols WHERE id = ".$_GET['id'];
// execute query
if ($mysqli->query($query)) {
// print number of affected rows
echo $mysqli->affected_rows."条记录被影响";
}
else {
// print error message
echo "Error in query: $query. ".$mysqli->error;
}
}
// query to get records
$query = "SELECT * FROM symbols";
// execute query
if ($result = $mysqli->query($query)) {
// see if any rows were returned
if ($result->num_rows > 0) {
// yes
// print them one after another
echo "<table cellpadding=10 border=1>";
while($row = $result->fetch_array()) {
echo "<tr>";
echo "<td>".$row[0]."</td>";
echo "<td>".$row[1]."</td>";
echo "<td>".$row[2]."</td>";
echo "<td><a href=".$_SERVER['PHP_SELF']."?id=".$row[0].">删除</a></td>";
echo "</tr>";
}
}
// free result set memory
$result->close();
}
else {
// print error message
echo "Error in query: $query. ".$mysqli->error;
}
// close connection
$mysqli->close();
?>
PHP代码:
<?php
// set server access variables
$host = "localhost";
$user = "root";
$pass = "root";
$db = "testdb";
// create mysqli object
// open connection
$mysqli = new mysqli($host, $user, $pass, $db);
// check for connection errors
if (mysqli_connect_errno()) {
die("Unable to connect!");
}
// if id provided, then delete that record
if (isset($_REQUEST['id'])) {
// create query to delete record
$query = "DELETE FROM symbols WHERE id = ".$_GET['id'];
// execute query
if ($mysqli->query($query)) {
// print number of affected rows
echo $mysqli->affected_rows."条记录被影响";
}
else {
// print error message
echo "Error in query: $query. ".$mysqli->error;
}
}
// query to get records
$query = "SELECT * FROM symbols";
// execute query
if ($result = $mysqli->query($query)) {
// see if any rows were returned
if ($result->num_rows > 0) {
// yes
// print them one after another
echo "<table cellpadding=10 border=1>";
while($row = $result->fetch_array()) {
echo "<tr>";
echo "<td>".$row[0]."</td>";
echo "<td>".$row[1]."</td>";
echo "<td>".$row[2]."</td>";
echo "<td><a href=".$_SERVER['PHP_SELF']."?id=".$row[0].">删除</a></td>";
echo "</tr>";
}
}
// free result set memory
$result->close();
}
else {
// print error message
echo "Error in query: $query. ".$mysqli->error;
}
// close connection
$mysqli->close();
?>
作者: phpcast 发布时间: 2008-03-24
请参考上例,希望你能顺利。
作者: phpcast 发布时间: 2008-03-24
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