phpcms 数据库操作总结

数据库的其他类继承的都是libs/class/model.class.php

这里面有写好的操作数据库的常用方法

1.增

insert($data, $return_insert_id = false, $replace = false)

/** * 执行添加记录操作 * @param $data 要增加的数据，参数为数组。数组key为字段值，数组值为数据取值 * @param $return_insert_id 是否返回新建ID号 * @param $replace 是否采用 replace into的方式添加数据 * @return boolean */     insert($data, $return_insert_id = false, $replace = false)

 union_listinfo($main_table, $secondary_table, $fields = '*', $where = '', $order = '', $page = 1, $pagesize = 20, $union_on='m.id=s.id',$limit='')

/** * 两个表联合查询分页 * @param string $main_table 主表 * @param string $secondary_table 副表 * @param string $data 查询字段 * @param string $where 条件 * @param string $order 排序 * @param string $page 分页 * @param string $pagesize 每页记录数 * @return array * @author:hans */         union_listinfo($main_table, $secondary_table, $fields = '*', $where = '', $order = '', $page = 1, $pagesize = 20, $union_on='m.id=s.id',$limit='')     

 2.删除

delete($where) $where is array

/** * 执行删除记录操作 * @param $where 删除数据条件,不充许为空。 * @return boolean */delete($where)

   asdd

3.改

 update($data,$where)

/** * 执行更新记录操作 * @param $data 要更新的数据内容，参数可以为数组也可以为字符串，建议数组。 * 为数组时数组key为字段值，数组值为数据取值 * 为字符串时[例：`name`='phpcms',`hits`=`hits`+1]。 *为数组时[例: array('name'=>'phpcms','password'=>'123456')] *数组的另一种使用array('name'=>'+=1', 'base'=>'-=1');程序会自动解析为`name` = `name` + 1, `base` = `base` - 1 * @param $where 更新数据时的条件,可为数组或字符串 * @return boolean */ update($data, $where = '')

 

4.查

select($where = '', $data = '*', $limit = '', $order = '', $group = '', $key='')

/** * 执行sql查询 * @param $where 查询条件[例`name`='$name'] * @param $data 需要查询的字段值[例`name`,`gender`,`birthday`] * @param $limit 返回结果范围[例：10或10,10 默认为空] * @param $order 排序方式[默认按数据库默认方式排序] * @param $group 分组方式[默认为空] * @param $key          返回数组按键名排序 * @return array查询结果集数组 */final public function select($where = '', $data = '*', $limit = '', $order = '', $group = '', $key='') {if (is_array($where)) $where = $this->sqls($where);return $this->db->select($data, $this->table_name, $where, $limit, $order, $group, $key);}

get_one($where = '', $data = '*', $order = '', $group = '')

/** * 获取单条记录查询 * @param $where 查询条件 * @param $data 需要查询的字段值[例`name`,`gender`,`birthday`] * @param $order 排序方式[默认按数据库默认方式排序] * @param $group 分组方式[默认为空] * @return array/null数据查询结果集,如果不存在，则返回空 */final public function get_one($where = '', $data = '*', $order = '', $group = '') {if (is_array($where)) $where = $this->sqls($where);return $this->db->get_one($data, $this->table_name, $where, $order, $group);}

query($sql) 用query来执行sql，得到的结果需要遍历一次才是数组

/** * 直接执行sql查询 * @param $sql查询sql语句 * @returnboolean/query resource如果为查询语句，返回资源句柄，否则返回true/false */final public function query($sql) {$sql = str_replace('phpcms_', $this->db_tablepre, $sql);return $this->db->query($sql);}

listinfo($where = '', $order = '', $page = 1, $pagesize = 20, $key='', $setpages = 10,$urlrule = '',$array = array(), $data = '*')查询多条记录并且分页，这里用到的分页和后台的分页是相同的样式（到后台看操作日志的分页），如果需要修改样式的话，需要赋值框架自己的分页，重命名后再修改，网上有很多例子。

/** * 查询多条数据并分页 * @param $where * @param $order * @param $page * @param $pagesize * @return unknown_type */final public function listinfo($where = '', $order = '', $page = 1, $pagesize = 20, $key='', $setpages = 10,$urlrule = '',$array = array(), $data = '*') {$where = to_sqls($where);$this->number = $this->count($where);$page = max(intval($page), 1);$offset = $pagesize*($page-1);$this->pages = pages($this->number, $page, $pagesize, $urlrule, $array, $setpages);$array = array();if ($this->number > 0) {return $this->select($where, $data, "$offset, $pagesize", $order, '', $key);} else {return array();}}

union_listinfo($main_table, $secondary_table, $fields = '*', $where = '', $order = '', $page = 1, $pagesize = 20, $union_on='m.id=s.id',$limit='')多表链接查询，类似tp里面的leftjoin，innerjoin 一般用于主表和附表链

public function union_listinfo($main_table, $secondary_table, $fields = '*', $where = '', $order = '', $page = 1, $pagesize = 20, $union_on='m.id=s.id',$limit='') {/*获取记录总数*/$query_count = "SELECT count(*) AS `total` FROM $main_table AS m INNER JOIN $secondary_table AS s ON $union_on WHERE $where";$this->db->query($query_count);$counts = $this->db->fetch_next();$this->number = $counts['total'];/*设置分页*/$page = max(intval($page), 1);$offset = $pagesize*($page-1);$this->pages = pages($this->number, $page, $pagesize);/*获取记录*/$array = array();if ($this->number > 0) {$query = "SELECT $fields FROM $main_table AS m";$query .= " INNER JOIN $secondary_table AS s ON $union_on";$query .= " WHERE $where";if($order) $query .= " ORDER BY $order";//排序if($limit) $query .= " LIMIT $limit";else $query .= " LIMIT $offset, $pagesize"; $this->db->query($query);$data = array();while($r = $this->db->fetch_next()) {$data[] = $r;}return $data;} else {return array();}}

 

其他查询 :

count($where = '')

/** * 计算记录数 * @param string/array $where 查询条件 */final public function count($where = '') {$r = $this->get_one($where, "COUNT(*) AS num");return $r['num'];}

 insert_id()

/** * 获取最后一次添加记录的主键号 * @return int  */final public function insert_id() {return $this->db->insert_id();}

 affected_rows()

 get_primary()

get_fields($table_name = '')

table_exists($table)

field_exists($field)

fetch_array()

/** * 获取最后数据库操作影响到的条数 * @return int */final public function affected_rows() {return $this->db->affected_rows();}/** * 获取数据表主键 * @return array */final public function get_primary() {return $this->db->get_primary($this->table_name);}/** * 获取表字段 * @param string $table_name    表名 * @return array */final public function get_fields($table_name = '') {if (empty($table_name)) {$table_name = $this->table_name;} else {$table_name = $this->db_tablepre.$table_name;}return $this->db->get_fields($table_name);}/** * 检查表是否存在 * @param $table 表名 * @return boolean */final public function table_exists($table){return $this->db->table_exists($this->db_tablepre.$table);}/** * 检查字段是否存在 * @param $field 字段名 * @return boolean */public function field_exists($field) {$fields = $this->db->get_fields($this->table_name);return array_key_exists($field, $fields);}final public function list_tables() {return $this->db->list_tables();}/** * 返回数据结果集 * @param $query （mysql_query返回值） * @return array */final public function fetch_array() {$data = array();while($r = $this->db->fetch_next()) {$data[] = $r;}return $data;}