版权声明：廖圣平博客，未经博主允许不得转载。企鹅：1194008361 https://blog.csdn.net/qq_22823581/article/details/84426138
使用方法
项目仓库
1.namespace 改成自己项目中的
2.new 这个PDO 类，注意是你命名空间的PDO（你也可以把这个类名改掉）
连接数据库
$PDO = PDO::getInstance($dbHost='', $dbUser ='', $dbPasswd ='', $dbName ='', $dbCharset='');
新增
eg: users信息
$PDO->table('users')->insert(['name'=>'liaosp']);
获取
查询一条：
$data =$PDO->table('oauth_clients')->where("client_id != 'admin'")->find();
获取多条
$data =$PDO->table('oauth_clients')->where("client_id != 'admin'")->get();
更新
$data =$PDO->table('oauth_clients')->where("id = 2")->update(['admin'=>'liaosp']);
<?php
/**
* @author liaosp.top
* @Time: 2018/11/24 -9:19
* @Version 1.0
* @Describe:
* 1:
* 2:
* ...
*/
class PDOs
{
protected static $_instance = null;
protected $dbName = '';
protected $dsn;
protected $dbh;
public $table =[];
protected $where;
protected $orderFiled;
protected $orderDesc;
/**
* 构造
* @return PDO
*/
private function __construct($dbHost, $dbUser, $dbPasswd, $dbName, $dbCharset)
{
try {
$this->dsn = 'mysql:host=' . $dbHost . ';dbname=' . $dbName;
$this->dbh = new \PDO($this->dsn, $dbUser, $dbPasswd);
$this->dbh->exec('SET character_set_connection=' . $dbCharset . ', character_set_results=' . $dbCharset . ', character_set_client=binary');
} catch (\PDOException $e) {
$this->outputError($e->getMessage());
}
}
public function table($table){
$this->table= $table;
return $this;
}
public function where($where){
$this->where = $where;
return $this;
}
public function get(){
$sql= $this->selectgetDataMatch();
$recordset = $this->dbh->query($sql);
if(!is_bool($recordset)){
$result = $recordset->fetchAll();
}
return $result;
}
public function order($filed,$desc){
$this->orderFiled = $filed;
$this->orderDesc = $desc;
return $this;
}
public function find(){
$sql= $this->selectgetDataMatch();
$recordset = $this->dbh->query($sql);
if(!is_bool($recordset)) {
$recordset = $recordset->fetch();
}
return $recordset;
}
public function selectgetDataMatch(){
$sql = "select * from ".$this->table;
if(!empty($this->where)){
$sql.=" where ".$this->where;
}
if(!empty($this->orderFiled)){
$sql.=' orderBy '.$this->orderFiled.' '.$this->orderDesc;
}
return $sql;
}
/**
* 防止克隆
*
*/
// private function __clone()
// {
// }
/**
* Singleton instance
*
* @return Object
*/
public static function getInstance($dbHost='', $dbUser ='', $dbPasswd ='', $dbName ='', $dbCharset='utf8')
{
if (self::$_instance === null) {
self::$_instance = new self($dbHost, $dbUser, $dbPasswd, $dbName, $dbCharset);
}
return self::$_instance;
}
/**
* Query 查询
*
* @param String $strSql SQL语句
* @param String $queryMode 查询方式(All or Row)
* @param Boolean $debug
* @return Array
*/
public function query($strSql, $queryMode = 'All', $debug = false)
{
if ($debug === true) $this->debug($strSql);
$recordset = $this->dbh->query($strSql);
$this->getPDOError();
if ($recordset) {
$recordset->setFetchMode(\PDO::FETCH_ASSOC);
if ($queryMode == 'All') {
$result = $recordset->fetchAll();
} elseif ($queryMode == 'Row') {
$result = $recordset->fetch();
}
} else {
$result = null;
}
return $result;
}
/**
* Update 更新
*
* @param String $table 表名
* @param Array $arrayDataValue 字段与值
* @param String $where 条件
* @param Boolean $debug
* @return Int
*/
public function update($arrayDataValue,$debug = false)
{
$table = $this->table;
$where = $this->where;
$this->checkFields($table, $arrayDataValue);
if ($where) {
$strSql = '';
foreach ($arrayDataValue as $key => $value) {
$strSql .= ", `$key`='$value'";
}
$strSql = substr($strSql, 1);
$strSql = "UPDATE `$table` SET $strSql WHERE $where";
} else {
$strSql = "REPLACE INTO `$table` (`" . implode('`,`', array_keys($arrayDataValue)) . "`) VALUES ('" . implode("','", $arrayDataValue) . "')";
}
if ($debug === true) $this->debug($strSql);
$result = $this->dbh->exec($strSql);
$this->getPDOError();
return $result;
}
/**
* Insert 插入
*
* @param String $table 表名
* @param Array $arrayDataValue 字段与值
* @param Boolean $debug
* @return Int
*/
public function insert( $arrayDataValue, $debug = false)
{
$table = $this->table;
$this->checkFields($table, $arrayDataValue);
$strSql = "INSERT INTO `$table` (`" . implode('`,`', array_keys($arrayDataValue)) . "`) VALUES ('" . implode("','", $arrayDataValue) . "')";
if ($debug === true) $this->debug($strSql);
$result = $this->dbh->exec($strSql);
if($result ==1){
$result =$this->dbh->lastInsertId();
}
$this->getPDOError();
return $result;
}
/**
* Replace 覆盖方式插入
*
* @param String $table 表名
* @param Array $arrayDataValue 字段与值
* @param Boolean $debug
* @return Int
*/
public function replace($table, $arrayDataValue, $debug = false)
{
$this->checkFields($table, $arrayDataValue);
$strSql = "REPLACE INTO `$table`(`" . implode('`,`', array_keys($arrayDataValue)) . "`) VALUES ('" . implode("','", $arrayDataValue) . "')";
if ($debug === true) $this->debug($strSql);
$result = $this->dbh->exec($strSql);
$this->getPDOError();
return $result;
}
/**
* Delete 删除
*
* @param String $table 表名
* @param String $where 条件
* @param Boolean $debug
* @return Int
*/
public function delete($table, $debug = false)
{
$where = $this->where;
$strSql = "DELETE FROM `$table` WHERE $where";
if ($debug === true) $this->debug($strSql);
$result = $this->dbh->exec($strSql);
$this->getPDOError();
return $result;
}
/**
* execSql 执行SQL语句,debug=>true可打印sql调试
*
* @param String $strSql
* @param Boolean $debug
* @return Int
*/
public function execSql($strSql, $debug = false)
{
if ($debug === true) $this->debug($strSql);
$result = $this->dbh->exec($strSql);
$this->getPDOError();
return $result;
}
/**
* 获取字段最大值
*
* @param string $table 表名
* @param string $field_name 字段名
* @param string $where 条件
*/
public function getMaxValue($table, $field_name, $where = '', $debug = false)
{
$strSql = "SELECT MAX(" . $field_name . ") AS MAX_VALUE FROM $table";
if ($where != '') $strSql .= " WHERE $where";
if ($debug === true) $this->debug($strSql);
$arrTemp = $this->query($strSql, 'Row');
$maxValue = $arrTemp["MAX_VALUE"];
if ($maxValue == "" || $maxValue == null) {
$maxValue = 0;
}
return $maxValue;
}
/**
* 获取指定列的数量
*
* @param string $table
* @param string $field_name
* @param string $where
* @param bool $debug
* @return int
*/
public function getCount($table, $field_name, $where = '', $debug = false)
{
$strSql = "SELECT COUNT($field_name) AS NUM FROM $table";
if ($where != '') $strSql .= " WHERE $where";
if ($debug === true) $this->debug($strSql);
$arrTemp = $this->query($strSql, 'Row');
return $arrTemp['NUM'];
}
/**
* 获取表引擎
*
* @param String $dbName 库名
* @param String $tableName 表名
* @param Boolean $debug
* @return String
*/
public function getTableEngine($dbName, $tableName)
{
$strSql = "SHOW TABLE STATUS FROM $dbName WHERE Name='" . $tableName . "'";
$arrayTableInfo = $this->query($strSql);
$this->getPDOError();
return $arrayTableInfo[0]['Engine'];
}
//预处理执行
public function prepareSql($sql = '')
{
return $this->dbh->prepare($sql);
}
//执行预处理
public function execute($presql)
{
return $this->dbh->execute($presql);
}
/**
* pdo属性设置
*/
public function setAttribute($p, $d)
{
$this->dbh->setAttribute($p, $d);
}
/**
* beginTransaction 事务开始
*/
public function beginTransaction()
{
$this->dbh->beginTransaction();
}
/**
* commit 事务提交
*/
public function commit()
{
$this->dbh->commit();
}
/**
* rollback 事务回滚
*/
public function rollback()
{
$this->dbh->rollback();
}
/**
* transaction 通过事务处理多条SQL语句
* 调用前需通过getTableEngine判断表引擎是否支持事务
*
* @param array $arraySql
* @return Boolean
*/
public function execTransaction($arraySql)
{
$retval = 1;
$this->beginTransaction();
foreach ($arraySql as $strSql) {
if ($this->execSql($strSql) == 0) $retval = 0;
}
if ($retval == 0) {
$this->rollback();
return false;
} else {
$this->commit();
return true;
}
}
/**
* checkFields 检查指定字段是否在指定数据表中存在
*
* @param String $table
* @param array $arrayField
*/
private function checkFields($table, $arrayFields)
{
$fields = $this->getFields($table);
foreach ($arrayFields as $key => $value) {
if (!in_array($key, $fields)) {
$this->outputError("Unknown column `$key` in field list.");
}
}
}
/**
* getFields 获取指定数据表中的全部字段名
*
* @param String $table 表名
* @return array
*/
private function getFields($table)
{
$fields = array();
$recordset = $this->dbh->query("SHOW COLUMNS FROM $table");
$this->getPDOError();
$recordset->setFetchMode(\PDO::FETCH_ASSOC);
$result = $recordset->fetchAll();
foreach ($result as $rows) {
$fields[] = $rows['Field'];
}
return $fields;
}
/**
* getPDOError 捕获PDO错误信息
*/
private function getPDOError()
{
if ($this->dbh->errorCode() != '00000') {
$arrayError = $this->dbh->errorInfo();
$this->outputError($arrayError[2]);
}
}
/**
* debug
*
* @param mixed $debuginfo
*/
private function debug($debuginfo)
{
var_dump($debuginfo);
exit();
}
/**
* 输出错误信息
*
* @param String $strErrMsg
*/
private function outputError($strErrMsg)
{
throw new \Exception('MySQL Error: ' . $strErrMsg);
}
/**
* destruct 关闭数据库连接
*/
public function destruct()
{
$this->dbh = null;
}
/**
*PDO执行sql语句,返回改变的条数
*如需调试可选用execSql($sql,true)
*/
public function exec($sql = '')
{
return $this->dbh->exec($sql);
}
}
部分代码参考互联网，廖圣平博客整理