PHP PDO encapsulated static class code sharing

/**
* Class DB
* Database operation class
*/
class DB {
/**
* @var
* @return CDB
*/
private static $db;
/**Get CDb class
* @param $table_name table name
* @param string $db_setting call database configuration item
* @param array $db_config database configuration
* @return CDb
*/
public static function cdb($table_name='',$db_setting='default',$db_config=array()){
if(!isset(self::$db)){
$db = new CDb($table_name,$db_setting, $db_config);
self::$db=$db;
}else{
$db=self::$db;
}
return $db;
}
/**Configuration
* @param $table_name table name
* @param string $db_setting Call database configuration item
* @param array $db_config database configuration
* @return CDb
*/
public static function init($table_name='',$db_setting='default',$db_config=array()) {
return self::cdb($table_name,$db_setting,$db_config);
}
/**
* Execute deletion record operation
* @param $table table name
* @param $condition Delete data condition, not allowed to be empty. Can be an array
* @return boolean
* /
public static function delete($table, $condition) {
$db=self::cdb();
$db->setTableName($table);
return $db->delete($condition);
}
/**
* Execute adding record operation
* @param $table table name
* @param array $data The data to be added, the parameter is an array.The array key is the field value, and the array value is the data value
* @param bool $return_insert_id Whether to return the new ID number
* @param bool $replace Whether to add data by replace into
* @return boolean
*/
public static function insert($table, $data, $return_insert_id = false, $replace = false) {
$db=self::cdb();
$db->setTableName($table);
return $db-> insert($data, $return_insert_id, $replace);
}
/**
* Get the primary key number of the last added record
* @return int
*/
public static function insertID() {
$db=self::cdb();
return $db->insert_id ();
}
/**
* Execute update record operation
* @param $table table name
* @param $data The data content to be updated, the parameter is an array
* When it is an array, the array key is the field value, and the array value is the data value
* When it is an array [Example: array('name'=>'lanmps','password'=>'123456')]
* Another way to use array array('name'=>'+=1', ' base'=>'-=1');The program will automatically parse as `name` = `name` + 1, `base` = `base` - 1
* string, please follow the format:
* string[ Example 2: array('catid=:catid AND time>=:time ',array(':catid'=>10,':time'=>'2012-02-10')) ]
* @param $where conditions for updating data,
* string, please follow the format:
* string [Example 1: " id=1 and time>$time " ]
* string [Example 2: array('catid=: catid AND time>=:time ',array(':catid'=>10,':time'=>'2012-02-10')) ]
* Array [Example: array('name'= >'lanmps','password'=>'123456')]
* @return boolean
*/ bbs.it-home.org
public static function update($table, $data, $where) {
$db=self::cdb();
$ db->setTableName($table);
return $db->update($data,$where);
}
/**
* Get single record query
* @param array $sql query condition statement
* @return array/null data query result set, if it does not exist, return empty
*/
public static function fetchFirst($sql) {
$db =self::cdb();
return $db->fetch($sql);
}
/**
* Execute sql query
* @param $sql query conditions
* @return array Query result set array
*/
public static function fetchAll($sql) {
$db=self::cdb ();
return $db->fetchAll($sql);
}
/**
* Directly execute sql query
* @param $sql Query sql statement
* @return
*/
public static function query($sql) {
$db=self::cdb();
return $db->exec($sql);
}
/**
* Execute sql query
* @param $table table name
* @param $where query condition
* String, please follow the format:
* String [Example 1: " id=1 and time>$time " ]
 * String [Example 2: array('catid=:catid AND time>=:time ',array(':catid'=>10,':time'=>'2012-02-10')) ]
* Array [Example: array('name'=>'lanmps','password'=>'123456')]
* @param $fields Field values ​​to be queried [Example `name`, `gender` ,`birthday`]
* @param $limit Return result range [Example: 10 or 10,10 is empty by default]
* @param $order Sorting method [Default is sorted by the database default method]
* @param $group Grouping method [Default is empty]
* @return array Query result set array
*/
public static function select($table,$where = '', $fields = '*', $limit = '', $order = '', $group = '') {
$db=self::cdb();
$db->setTableName($table);
return $db->select($where , $fields , $limit, $order, $group);
}
/**
* Get single record query
* @param $table table name
* @param array $where query conditional statement
* String, please follow the format:
* String [Example 2: array('catid=:catid AND time> ;=:time ',array(':catid'=>10,':time'=>'2012-02-10')) ]
* Array [Example: array('name'=>' lanmps','password'=>'123456')]
* @param string $fields Field values ​​to be queried [eg `name`,`gender`,`birthday`]
* @param string $order Sorting method[ The default is to sort according to the database default method]
* @param string $group grouping method [default is empty]
* @return array/null data query result set, if it does not exist, return empty
*/
public static function getOne($table,$where,$fields = '*', $order = '', $group = '') {
$db=self::cdb();
$db->setTableName($table);
return $db->get_one($where , $fields,$order, $group);
 }
/**
* Query multiple pieces of data and paginate
* @param $table table name
* @param $where query conditions
* String, please follow the format:
* String [Example 1: " id=1 and time>$time " ]
* String [Example 2: array('catid=:catid AND time>=:time ',array(':catid'=>10,':time'=>'2012-02-10' )) ]
* Array [Example: array('name'=>'lanmps','password'=>'123456')]
* @param $fields field*,id
* @param $order sort id desc ,orderlist asc
* @param $page page number 1
* @param $pagesize number of items per page
* @return array('data'=>data,'count'=>total number of records)
*/
public static function listInfo($table,$where = '',$fields='*', $order = '', $page = 1, $pagesize = 20) {
$db=self::cdb();
$db->setTableName($table);
$d=$db->listinfo($where,$fields, $order, $page, $pagesize);
return array('data'=>$d,'count'=>self::$db->number);
}
/**First parameter value
* @param $sql
* @return mixed
*/
public static function resultFirst($sql){
$db=self::cdb();
return $db->resultFirst($sql);
}
}

调用方法：

DB::insert('test',array('name'=>'test'));