php实现mysql数据库操作类分享

2020-03-22 16:26:13

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复制代码代码如下:
?php
/*
数据库操作类
*/
html' target='_blank'>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 "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
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
$PageHtml .= " /div
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 ? "/n/t" . ' a href="' . $Can . $i . '" ' . $i . ' /a ' . "/n/t" : "/n/t" .' a disabled="disabled" ' . $i . ' /a ' . "/n/t";
}
unset($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 "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
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
$PageHtml .= " /div div "clear/" /div
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：
复制代码代码如下:
$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；

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