这篇文章主要介绍了php实现的mysql数据库操作类，本文最后有使用方法,需要的朋友可以参考下
代码如下:
<?php
/*
数据库操作类
*/
class Mysql{
private $LocalHost = 'localhost';
private $LoaclUser = 'root';
private $LocalPass = '123456';
private $LocalBase = 'jiangxibaiyi';
private $LocalCode = 'UTF8';
private $PreFix;
private $Conn;
private $Start= 0;
private $Error= false; //数据库连接状态, false表示未连接或连接不正常
public$Err= true;//Sql执行结果
private $Table;
private $Field= '*';
private $Where= '';
private $Order= '';
private $PageSize= 0; //分页显示->每页多少条，0为不分页显示
private $PageCount = 1; //分页显示->总共有多少条
private $PageNum= 1; //分页显示->总共有多少页
private $PageNo= 1; //分页显示->当前第几页
private $PageKey= 'page'; //分页url参数键
private $PageStart = 0; //分页显示->当前从第几条开始返回
private $Select;
private $Rest;
private $Result= false;//结果集
public $FormArray = array();
public $Instr_ID= 0;
private $j =0;
public function Parameter($Loca, $Root, $Pass, $Base, $Code, $PreFix = ''){
$this->LoaclUser = $Root;
$this->LocalBase = $Base;
$this->LocalCode = $Code;
$this->LocalHost = $Loca;
$this->LocalPass = $Pass;
$this->PreFix= $PreFix;
return $this;
}
private function Connection( $Sql ){
!function_exists(mysqli_connect) ? die('查询失败，无法加载mysqli扩展') : null;
$this->Conn = @new mysqli( $this->LocalHost, $this->LoaclUser, $this->LocalPass, $this->LocalBase);
$this->Error = mysqli_connect_errno() == 0 ? true : false;
!$this->Error ? die('数据库连接错误，请检查数据库连接参数') : null;
$this->Conn->query('SET NAMES ' . $this->LocalCode);
$this->Rest = $this->Conn->query($Sql);
$this->Err= mysqli_error($this->Conn);
$this->Instr_ID = mysqli_insert_id($this->Conn);
$this->Rest->free_result;
$this->Conn->close;
$this -> FormArray = '';
return $this;
}
public function null(){
$this->PageSize= 0;
//$this->PageCount = 1;
$this->PageStart = 1;
$this->Field= ' * ';
$this->Select= '';
unset($this->Table, $this->Where,$this->Order, $this->Result);
}
public function Table( $TableName ) {//数据表
$this -> null();
$this->Table = '`' . $this->PreFix . $TableName . '`';
return $this;
}
public function Field( $Array = '*' ) {//数据字段
!empty( $this->Field ) ? $this->Field = '' : null;
$Array = explode(',', $Array);
foreach ( $Array as $field ) {
$this->Field .= !$this->Start ? '`' . $field . '`' :', `' . $field . '`';
$this->Start++;
}
$this->Start = 0;
return $this;
}
public function Where( $Where ) {//条件
$this->Where = ' where ' .$Where;
return $this;
}
public function Order( $Order ) {//排序
$this->Order = ' order by ' . $Order;
return $this;
}
public function pk( $key ) {//分页url参数键
$this->PageKey = $key;
return $this;
}
public function Page( $PageSize ) {//分页
$this->PageSize = $PageSize;
$this->PageNo= $this->get( $this->PageKey );
$this->PageNo= empty( $this->PageNo ) || !isset( $this->PageNo ) || !is_numeric( $this->PageNo ) || $this->PageNo < 1 ? 1 : $this->PageNo;
return $this;
}
public function post( $Key, $Filter = true ){
return $Filter ? strip_tags($_POST[$Key]) : $_POST[$Key];
}
public function get( $Key, $Filter = true ){
return $Filter ? strip_tags($_GET[$Key]) : $_GET[$Key];
}
public function Sel(){
$this->Select = 'Select ' . $this->Field . ' from ' . $this->Table . $this->Where . $this->Order;
$this->Connection( $this->Select );
if ( $this->Rest->num_rows ) {
while ( $Rs = $this->Rest->fetch_assoc() ) {
$this->Result[] = $Rs;
}
}
$DataBase = $this->Result;
return empty($DataBase) ? false : $DataBase;
}
public function querys( $Sql = '', $Type = 'not', $biao = false ) {
$this->Select = $Sql;
$this->Connection( $this->Select );
if ( $this->Rest->num_rows ) {
if ( !$biao ) {
while ( $Rs = $this->Rest->fetch_array() ) {
$this->Result[] = !preg_match('/^d+$/i', $Type) ?$Rs : $Rs[ $Type ];
}
} else {
while ( $Rs = $this->Rest->fetch_assoc() ) {
$this->Result[] = $Rs;
}
}
}
$DataBase = $this->Result;
return empty($DataBase) ? false : $DataBase;
}
public function executes( $Sql = '' ){
$this->Connection( $Sql);
return $this->Rest;
}
public function exists( $T = '', $F = '', $W = ''){
if ( empty( $F ) ) { return 0; }
$cmd = empty( $W ) ? 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'`' : 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'` Where ' . $W;
$this->Connection( $cmd );
unset( $T, $F, $W, $cmd );
$Rel =$this->Rest->fetch_array();
return round( $Rel['baiyinum'], 2 );
}
public function ExistsTo( $Bili = 10000, $T = '', $F = '', $W = ''){
if ( empty( $F ) ) { return 0; }
$cmd = empty( $W ) ? 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'`' : 'Select sum(' . $F . ') as `baiyinum` from `' . $this->PreFix . $T .'` Where ' . $W;
$this->Connection( $cmd );
unset( $T, $F, $W, $cmd );
$Rel =$this->Rest->fetch_array();
return round( $Rel['baiyinum'] * $Bili );
}
public function Select( $Type = true, $ListNum = 1 ){ //返回记录（数组形式， 返回条数）
$this->Select = 'Select ' . $this->Field . ' from ' . $this->Table . $this->Where . $this->Order;
if ( is_numeric( $ListNum ) ) {
if ( $this->PageSize > 0 ) {
$this->Connection( $this->Select );//执行查询
$this->PageCount =$this->Rest->num_rows;//取得记录总数
$this->PageNum=ceil($this->PageCount / $this->PageSize); //总共有多少页
$this->PageNo= $this->PageNo > $this->PageNum ? $this->PageNum : $this->PageNo;
$this->PageStart = ( $this->PageNo - 1 ) * $this->PageSize;//当前从第几条开始返回
$this->Select.= ' limit ' . $this->PageStart . ', ' .$this->PageSize; //重新构造sql语句
} else {
$this->Select.= ' limit ' . $ListNum; //重新构造sql语句
}
} else {
$this->Select.= ' limit 1'; //重新构造sql语句
}
//echo $this->Select;
$this->Connection( $this->Select );//再次执行查询
if ( $this->Rest->num_rows ) {//如果记录存在
if ( $Type ) {
while ( $Rs = $this->Rest->fetch_array() ) {
$this->Result[] = $Rs;
}
}else{
while ( $Rs = $this->Rest->fetch_assoc() ) {
$this->Result[] = $Rs;
}
}
}
if ( ( $ListNum == 1 or !is_numeric( $ListNum ) ) && !$this->PageSize) { $this->Result = $this->Result[0]; }
$DataBase = $this->Result;
return empty($DataBase) ? false : $DataBase;
}
public function Num() { //返回记录总数
$this->Select = 'Select ' . $this->Field . ' from ' . $this->Table . $this->Where . $this->Order;
$this->Connection( $this->Select );//执行查询
return $this->Rest->num_rows;//取得记录总数
}
public function PageNav($NumNav = false ) {//分页
$Action = $this -> get('action');
!empty( $Action ) or $Action ='index';
$Module = $this -> get('module');
!empty( $Module ) or $Module = 'index';
$NavUrl= '/' . $Module . '/' . $Action . '/' . $this -> PageKey .'/';
$NaIndex= '/' . $Module . '/' . $Action;
$PageHtml = "n<div class="pagenav">";
$PageHtml .= '<span>' . $this->PageCount . '条记录' . $this->PageNo . '/' . $this->PageNum . '页</span>';
$this->PageNo <= 1 or $PageHtml .= "<a href="" . $NaIndex . "">首页</a>n<a href="" .$NavUrl . ($this->PageNo - 1) . "">上一页</a>n";
if ( $NumNav ) { $PageHtml .= $this->NumPage($NavUrl); }
$this->PageNo >= $this->PageNum or $PageHtml .= "<a href="" . $NavUrl. ($this->PageNo + 1) ."">下一页</a>n<a href="" . $NavUrl . $this->PageNum . "">尾页</a>n";
$PageHtml .= "</div>n";
return$PageHtml;
}
private function NumPage( $Can = '' ) { //数字分页
$NumHtml = '';
$First= 1;
$Last= $this->PageNum;
if ( $this->PageNum > 5 ) {
if ( $this->PageNo < $this->PageNum ) {
$First = $this->PageNo - 2;
$Last= $this->PageNo + 2;
}else{
$First = $this->PageNo - 4;
$Last= $this->PageNum;
}
}
if ( $First < 1 ) { $First= 1; $Last = $First + 4;}
if ( $Last> $this->PageNum ) { $First= $this->PageNum - 4; $Last = $this->PageNum;}
for( $i = $First; $i <= $Last; $i++) {
$NumHtml .= $this->PageNo != $i ? "nt" . '<a href="' . $Can . $i . '">' . $i . '</a>' . "nt" : "nt" .'<a class="hover" disabled="disabled">' . $i . '</a>' . "nt";
}
unset($Can, $First, $i, $Last);
return $NumHtml;
}
public function UserPage($NumNav = false, $PageName = 'index', $Mulu = 'user' ) {//会员中心分页
$NavUrl= '/' . $Mulu . '/' . $PageName . '/' . $this->PageKey . '/';
$PageHtml = "n<div class="pagenav">";
$PageHtml .= '<span>' . $this->PageCount . '条记录' . $this->PageNo . '/' . $this->PageNum . '页</span>';
$this->PageNo <= 1 or $PageHtml .= "<a href="" . $NavUrl . "1">首页</a>n<a href="" .$NavUrl . ($this->PageNo - 1) . "">上一页</a>n";
if ( $NumNav ) { $PageHtml .= $this->NumPage($NavUrl); }
$this->PageNo >= $this->PageNum or $PageHtml .= "<a href="" . $NavUrl. ($this->PageNo + 1) ."">下一页</a>n<a href="" . $NavUrl . $this->PageNum . "">尾页</a>n";
$PageHtml .= "</div><div class="clear"></div>n";
return$PageHtml;
}
//表单处理开始
//判断表单时候提交
public function FormIs( $Keys = 'mm' ) {
return $_POST[ $Keys ] == 1 ? true : false;
}
//post方式获取数据
public function _post( $Keys = '', $TiHuan = '') {
$Values = strip_tags( $_POST[ $Keys ] );
$this->FormArray[$Keys] = empty( $Values ) ? $TiHuan : $Values;
returnempty( $Values ) ? $TiHuan : $Values;
}
//get方法获取数据
public function _get( $Keys = '', $TiHuan = '') {
$Values = strip_tags( $_GET[ $Keys ] );
returnempty( $Values ) ? $TiHuan : $Values;
}
//判断是否为数字并且不小于0
public function IsNum( $Num = 0, $Mesg = '参数必须为数字' ) {
if ( is_numeric( $Num ) && !empty( $Num ) && $Num >= 0 ) {
return $Num;
}else{
die( $Mesg );
}
}
//判断是否为数字并且不小于0返回True/False
public function NumBer( $Num = 0) {
returnis_numeric( $Num ) && !empty( $Num ) && $Num >= 0 ? true : false;
}
//检测相关数据似乎存在
public function IsData($Types = true, $memg = '数据已经存在' ){
$this->Connection('select ' . $this->Field . ' from ' . $this->Table . $this->Where);
if ( $Types ){
$this->Rest->num_rows > 0 ? die( $memg ) : null;
} else {
return $this->Rest->num_rows;
}
}
//写入数据库记录
public function into( $Mesg = '' ){
!is_array( $this->FormArray ) ? die( $Mesg ) : null;
$Sql = 'insert into ' . $this->Table . ' (`';
$I= 0;
foreach ( $this->FormArray as $Key => $Val ){
$Duan .= !$I ? $Key . '`' : ', `' . $Key . '`';
if ( is_numeric( $Val ) ){
$Vals .= !$I ? $Val : ', ' . $Val;
}else{
$Vals .= !$I ? ''' . $Val . ''' : ', '' . $Val . ''';
}
$I++;
}
$Sql .= $Duan . ') values (' . $Vals . ')';
//@file_put_contents('1.sql', $Sql, FILE_APPEND);
$this->Connection( $Sql );
return !empty( $this->Err ) ? false : true;
}
//数组形式写入数据
public function MsgBox( $Table = '', $Filed = array() ) {
$this -> Table($Table);
foreach( $Filed as $Key => $Val ) {
$this -> FormArray[ $Key ] = $Val;
}
return $this ->Into('未取得数据');
}
//修改数据库记录
public function Edit( $Array = array() ) {
if ( empty( $Array ) ) { $Array = $this -> FormArray; }
if ( !is_array( $Array ) || empty( $Array ) ) {
return false;
} else {
$Sql = 'update ' . $this -> Table . ' set ';
$I= 0;
$Sub = '';
$Huan = array('-' => '[jian]', '+' => '[jia]', '*' => '[cheng]', '/' => '[chu]');
$Zhan = array('[jian]' => '-', '[jia]' => '+', '[cheng]' => '*', '[chu]' => '/');
foreach ( $Array as $Files => $Val ) {
$Val= !is_numeric( $Val ) && !preg_match('/`w+`s*(+|-|*|/)/i', $Val) ? ''' . $Val . ''' : $Val;
foreach ( $Huan as $key => $val ){
$Val = str_replace($key, $val, $Val);
}
$duan = !$I ? '`' . $Files . '` = ' :', `' . $Files . '` = ';
$Sub .= $duan . $Val;
$I++;
}
$Sql .= $Sub . $this -> Where;
foreach ( $Zhan as $Fan => $Hui ) {
$Sql = str_replace($Fan, $Hui, $Sql);
}
//echo $Sql; die;
$this -> Connection( $Sql );
unset( $Array, $duan, $Fan, $Files, $Huan, $Hui, $I, $key, $Sql, $Sub, $Val, $Zhan, $val );
return !empty( $this -> Err ) ? false : true;
}
}
//删除数据库记录
public function del(){
$Sql = 'delete from ' . $this->Table . $this->Where;
$this->Connection( $Sql );
unset($Sql);
return !empty( $this->Err ) ? false : true;
}
//表单处理结束
//页面跳转
public function Msg( $Text = '操作成功' ) {
echo '<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />';
echo '<script type="text/javascript">
<!--
alert("' . $Text . '");
document.location="' . $_SERVER['HTTP_REFERER'] . '";
//-->
</script>';
exit;
}
#取得系统当前时间
public function Times(){
return str_replace('-', '[jian]', date('Y-m-d H:i:s'));
}
#取得用户IP地址
public function GetIP(){
if (getenv("HTTP_CLIENT_IP") && strcasecmp(getenv("HTTP_CLIENT_IP"), "unknown"))
$ip = getenv("HTTP_CLIENT_IP");
else if (getenv("HTTP_X_FORWARDED_FOR") && strcasecmp(getenv("HTTP_X_FORWARDED_FOR"), "unknown"))
$ip = getenv("HTTP_X_FORWARDED_FOR");
else if (getenv("REMOTE_ADDR") && strcasecmp(getenv("REMOTE_ADDR"), "unknown"))
$ip = getenv("REMOTE_ADDR");
else if (isset($_SERVER['REMOTE_ADDR']) && $_SERVER['REMOTE_ADDR'] && strcasecmp($_SERVER['REMOTE_ADDR'], "unknown"))
$ip = $_SERVER['REMOTE_ADDR'];
else
$ip = "unknown";
return($ip);
}
//最后关闭数据库连接
public function Close(){
!is_object( $this -> Conn ) or mysqli_close( $this -> Conn );
}
}
使用方法：
声明数据库对象
$Conn = new Mysql;
加载数据库参数
$Conn->Parameter(数据库服务器, 数据库用户名, 数据库密码, 数据库名称, 数据库编码, 数据库表前缀[可为空]);
上面的代码就已经加载这个类文件进来了，并且初始化了一些数据库连接参数！
下面介绍几个基本是方法函数：
1、 $Conn -> Table();
选择数据表，参数是数据表名称
2、$Conn -> Field();
选择的字段名称，多个用逗号隔开，如不调用这个方法，则返回全部
3、$Conn -> Where();
Sql Where子语句，根据条件筛选
4、$Conn -> Order();
Sql 排序
5、$Conn -> Page(int);
参数是一个正整数数字，如调用这个方法，记录将分页显示
6、$Conn -> Select(布尔值);
执行查询，返回查询结果，如果有，则是一个二维数组，如果无，则返回假，参数可省略，如省略，默认为真，返回的数组包含数字元素
7、$Conn -> Del();
删除记录
8、 $Conn -> Edit(array());
修改记录，参数是一个一维数组，数组键是字段名称，数组值是字段值
9、$Conn -> Into(array());
添加记录，参数是一个一维数组，数组键是字段名称，数组值是字段值。
以上方法可连续调用，比如：
代码如下:
$Rult = $Conn -> Table('user') -> Select(); //查询返回user表的所有记录
$Rult = $Conn -> Table('user') -> Page(20) -> Select();//查询返回user表的所有记录，并分页显示，每页20条；
