c.php
<?php
class opmysqli{
private $host=''; //服务器地址
private $name='' ; //登录账号
private $pwd =''; //登录密码
private $dBase=''; //数据库名称
private $conn ; //数据库链接资源
private $result ; //结果集
private $msg ; //返回结果
private $fields; //返回字段
private $fieldsNum; //返回字段数
private $rowsNum; //返回结果数
private $rowsRst ; //返回单条记录的字段数组
private $filesArray = array(); //返回字段数组
private $rowsArray = array(); //返回结果数组
//初始化类
function __construct($host='',$name='',$pwd='',$dBase=''){
$this->host = $host;
$this->name = $name;
$this->pwd = $pwd;
$this->dBase = $dBase;
$this->init_conn();
}
//链接数据库
function init_conn(){
$this->conn=mysqli_connect($this->host,$this->name,$this->pwd);
mysqli_select_db($this->conn,$this->dBase);
mysqli_query($this->conn,"set names utf8");
}
//查询结果
function mysqli_query_rst($sql){
if($this->conn == ''){
$this->init_conn();
}
$this->result = mysqli_query($this->conn,$sql);
}
//取得字段数
function getFieldsNum($sql){
$this->mysqli_query_rst($sql);
$this->fieldsNum = mysqli_num_fields($this->result);
}
//取得查询结果数
function getRowsNum($sql){
$this->mysqli_query_rst($sql);
if(mysqli_errno() == 0){
return mysqli_num_rows($this->result);
}else{
return '';
}
}
//取得记录数组（单条记录）
function getRowsRst($sql){
$this->mysqli_query_rst($sql);
if(mysqli_error() == 0){
$this->rowsRst = mysqli_fetch_array($this->result,MYSQL_ASSOC);
return $this->rowsRst;
}else{
return '';
}
}
//取得记录数组（多条记录）
function getRowsArray($sql){
$this->mysqli_query_rst($sql);
if(mysqli_errno() == 0){
while($row = mysqli_fetch_array($this->result,MYSQL_ASSOC)) {
$this->rowsArray[] = $row;
}
return $this->rowsArray;
}else{
return '';
}
}
//更新、删除、添加记录数
function uidRst($sql){
if($this->conn == ''){
$this->init_conn();
}
mysqli_query($sql);
$this->rowsNum = mysqli_affected_rows();
if(mysqli_errno() == 0){
return $this->rowsNum;
}else{
return '';
}
}
//获取对应的字段值
function getFields($sql,$fields){
$this->mysqli_query_rst($sql);
if(mysqli_errno() == 0){
if(mysqli_num_rows($this->result) > 0){
$tmpfld = mysqli_fetch_row($this->result);
$this->fields = $tmpfld[$fields];
}
return $this->fields;
}else{
return '';
}
}
//错误信息
function msg_error(){
if(mysqli_errno() != 0) {
$this->msg = mysqli_error();
}
return $this->msg;
}
//释放结果集
function close_rst(){
mysqli_free_result($this->result);
$this->msg = '';
$this->fieldsNum = 0;
$this->rowsNum = 0;
$this->filesArray = '';
$this->rowsArray = '';
}
//关闭数据库
function close_conn(){
$this->close_rst();
mysqli_close($this->conn);
$this->conn = '';
}
}
$conne = new opmysqli();
## index.php
<?php
include'c.php';
$sql="select * from tb_member";
if($conne->getRowsNum($sql)){
$n=$conne->mysqli_query_rst($sql);
echo "查询成功";
echo $n;
}
else{
echo "查询失败";
}
?>
本文介绍了一个用于PHP的数据库操作类，该类使用mysqli扩展进行数据库连接和操作，提供了包括连接数据库、执行查询、获取字段数、获取结果数、获取单条或多条记录等功能。通过实例演示了如何使用此类进行数据库查询。
扫一扫
被折叠的 条评论
为什么被折叠?
到【灌水乐园】发言
325
