php实现的mysql数据库操作类

php实现的mysql数据库操作类

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 >";

$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 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 >";

$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 ></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;

return empty( $Values ) ? $TiHuan : $Values;

}

//get方法获取数据

public function _get( $Keys = '', $TiHuan = '') {

$Values = strip_tags( $_GET[ $Keys ] );

return empty( $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) {

return is_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;