mysqli的简单工具包

mysqli的简单工具包

 <?php
 /**
  * 连接
  * @param string $host
  * @param string $user
  * @param string $password
  * @param string $charset
  * @param string $database
  * @return object 连接标识符
  */
 function connect1($host,$user,$password,$charset,$database) {
     $link = mysqli_connect ( $host, $user, $password ) or die ( '数据库连接失败<br/>ERROR ' . mysqli_connect_errno () . ':' . mysqli_connect_error () );
     mysqli_set_charset ( $link, $charset );
     mysqli_select_db ( $link, $database ) or die ( '指定数据库打开失败<br/>ERROR ' . mysqli_errno ( $link ) . ':' . mysqli_error ( $link ) );
     return $link;
 }
 /**
  * 连接 需要传递数组
  * @param array $config
  * @return object
  */
 function connect2($config) {
     $link = mysqli_connect ( $config ['host'], $config ['user'], $config ['password'] ) or die ( '数据库连接失败<br/>ERROR ' . mysqli_connect_errno () . ':' . mysqli_connect_error () );
     mysqli_set_charset ( $link, $config ['charset'] );
     mysqli_select_db ( $link, $config ['dbName'] ) or die ( '指定数据库打开失败<br/>ERROR ' . mysqli_errno ( $link ) . ':' . mysqli_error ( $link ) );
     return $link;
 }
 /**
  * 用常量的形式建立连接
  * @return unknown
  */
 function connect3(){
     $link = mysqli_connect ( DB_HOST, DB_USER, DB_PWD ) or die ( '数据库连接失败<br/>ERROR ' . mysqli_connect_errno () . ':' . mysqli_connect_error () );
     mysqli_set_charset ( $link, DB_CHARSET );
     mysqli_select_db ( $link, DB_DBNAME ) or die ( '指定数据库打开失败<br/>ERROR ' . mysqli_errno ( $link ) . ':' . mysqli_error ( $link ) );
     return $link;
 }

 /*
  array(
  'username'=>'king',
  'password'=>'king',
  'age'=>'12',
  'regTime'=>'123123123'
  );
  INSERT user(username,password,age,regTime) VALUES('king','king','12','123123123');
  */
 /**
  * 插入操作
  * @param object $link
  * @param array $data
  * @param string $table
  * @return boolean
  */
 function insert($link,$data,$table){
     $keys = join ( ',', array_keys ( $data ) );
     $vals = "'" . join ( "','", array_values ( $data ) ) . "'";
     $query = "INSERT {$table}({$keys}) VALUES({$vals})";
     $res = mysqli_query ( $link, $query );
     if ($res) {
         return mysqli_insert_id ( $link );
     } else {
         return false;
     }
 }

 /*
  array(
          'username'=>'king123',
          'password'=>'king123',
          'age'=>'32',
          'regTime'=>'123123123'
  );
  UPDATE user SET username='king123',password='king123',age='32',regTime='123123123' WHERE id=1
 */
 /**
  * 更新操作
  * @param object $link
  * @param array $data
  * @param string $table
  * @param string $where
  * @return boolean
  */
 function update($link, $data, $table, $where = null) {
     foreach ( $data as $key => $val ) {
         $set .= "{$key}='{$val}',";
     }
     $set = trim ( $set, ',' );
     $where = $where == null ? '' : ' WHERE ' . $where;
     $query = "UPDATE {$table} SET {$set} {$where}";
     $res = mysqli_query ( $link, $query );
     if ($res) {
         return mysqli_affected_rows ( $link );
     } else {
         return false;
     }
 }

 //DELETE FROM user WHERE id=
 /**
  * 删除操作
  * @param object $link
  * @param string $table
  * @param string $where
  * @return boolean
  */
 function delete($link, $table, $where = null) {
     $where = $where ? ' WHERE ' . $where : '';
     $query = "DELETE FROM {$table} {$where}";
     $res = mysqli_query ( $link, $query );
     if ($res) {
         return mysqli_affected_rows ( $link );
     } else {
         return false;
     }
 }

 /**
  * 查询指定记录
  * @param object $link
  * @param string $query
  * @param string $result_type
  * @return array|boolean
  */
 function fetchOne($link, $query, $result_type = MYSQLI_ASSOC) {
     $result = mysqli_query ( $link, $query );
     if ($result && mysqli_num_rows ( $result ) > 0) {
         $row = mysqli_fetch_array ( $result, $result_type );
         return $row;
     } else {
         return false;
     }
 }

 /**
  * 查询所有记录
  * @param object $link
  * @param string $query
  * @param string $result_type
  * @return array|boolean
  */
 function fetchAll($link, $query, $result_type = MYSQLI_ASSOC) {
     $result = mysqli_query ( $link, $query );
     if ($result && mysqli_num_rows ( $result ) > 0) {
         while ( $row = mysqli_fetch_array ( $result, $result_type ) ) {
             $rows [] = $row;
         }
         return $rows;
     } else {
         return false;
     }
 }

 /**
  * 得到表中的记录数
  * @param object $link
  * @param string $table
  * @return number|boolean
  */
 function getTotalRows($link, $table) {
     $query = "SELECT COUNT(*) AS totalRows FROM {$table}";
     $result = mysqli_query ( $link, $query );
     if ($result && mysqli_num_rows ( $result ) == 1) {
         $row = mysqli_fetch_assoc ( $result );
         return $row ['totalRows'];
     } else {
         return false;
     }
 }

 /**
  * 得到结果集的记录条数
  * @param object $link
  * @param string $query
  * @return boolean
  */
 function getResultRows($link, $query) {
     $result = mysqli_query ( $link, $query );
     if ($result) {
         return mysqli_num_rows ( $result );
     } else {
         return false;
     }
 }

 /**
  * @param object $link
  */
 function getServerInfo($link) {
     return mysqli_get_server_info ( $link );
 }
 /**
  * @param object $link
  */
 function getClientInfo($link) {
     return mysqli_get_client_info ( $link );
 }

 /**
  * @param object $link
  */
 function getHostInfo($link){
     return mysqli_get_host_info($link);
 }

 /**
  * @param object $link
  */
 function getProtoInfo($link) {
     return mysqli_get_proto_info ( $link );
 }

 <?php
 $config = array(
     'host'=>'localhost',
     'user'=>'root',
     'password'=>'root',
     'charset'=>'utf8',
     'dbName'=>'51zxw'
 );

 define('DB_HOST','localhost');
 define('DB_USER','root');
 define('DB_PWD','root');
 define('DB_CHARSET','utf8');
 define('DB_DBNAME','51zxw');