Posted in PHP onMarch 06, 2019
本文实例讲述了Yaf框架封装的MySQL数据库操作。分享给大家供大家参考,具体如下:
Yaf封装DB简单操作
介绍
因为Yaf是一个纯天然的MVC阔架,本人还在贝锐的时候就和主管一起用Yaf框架去重构了向日葵的网站端,到后面,Yaf也逐渐应用到了其他项目上,但是Yaf是没有带DB类库的,所以本人也共享下最近封装的代码!
代码
使用PDO封装MySQL操作
class Db_Mysql { private $_options = array(); private $db; private $statement; private $_fetchMode = 2; /** * 构造函数 * * @param string $host * @param string $username * @param string $password * @param string $dbname * @param string $charset */ private function __construct($host, $username, $password, $dbname, $charset) { //初始化数据连接 try { $dns = 'mysql:dbname=' . $dbname . ';host=' . $host; $this->db = new PDO($dns, $username, $password, array(PDO::ATTR_PERSISTENT => true, PDO::ATTR_AUTOCOMMIT => 1)); $this->db->query('SET NAMES ' . $charset); } catch (PDOException $e) { echo header("Content-type: text/html; charset=utf-8"); echo '<pre />'; echo '<b>Connection failed:</b>' . $e->getMessage(); die; } } /** * 调用初始化MYSQL连接 * * @param string $config * @return Aomp_Db_Mysql */ static public function getInstance($config = '') { $host = $config->host; $username = $config->username; $password = $config->password; $dbname = $config->dbname; $charset = $config->charset; $db = new self($host, $username, $password, $dbname, $charset); return $db; } /** * 获取多条数据 * * @param string $sql * @param array $bind * @param string $fetchMode * @return multitype: */ public function fetchAll($sql, $bind = array(), $fetchMode = null) { if($fetchMode === NULL){ $fetchMode = $this->_fetchMode; } $stmt = $this->query($sql, $bind); $res = $stmt->fetchAll($fetchMode); return $res; } /** * 获取单条数据 * * @param string $sql * @param array $bind * @param string $fetchMode * @return mixed */ public function fetchRow($sql, array $bind = array(), $fetchMode = null) { if ($fetchMode === null) { $fetchMode = $this->_fetchMode; } $stmt = $this->query($sql, $bind); $result = $stmt->fetch($fetchMode); return $result; } /** * 获取统计或者ID * * @param string $sql * @param array $bind * @return string */ public function fetchOne($sql, array $bind = array()) { $stmt = $this->query($sql, $bind); $res = $stmt->fetchColumn(0); return $res; } /** * 增加 * * @param string $table * @param array $bind * @return number */ public function insert($table, array $bind) { $cols = array(); $vals = array(); foreach ($bind as $k => $v) { $cols[] = '`' . $k . '`'; $vals[] = ':' . $k; unset($bind[$k]); $bind[':' . $k] = $v; } $sql = 'INSERT INTO ' . $table . ' (' . implode(',', $cols) . ') ' . 'VALUES (' . implode(',', $vals) . ')'; $stmt = $this->query($sql, $bind); $res = $stmt->rowCount(); return $res; } /** * 删除 * * @param string $table * @param string $where * @return boolean */ public function delete($table, $where = '') { $where = $this->_whereExpr($where); $sql = 'DELETE FROM ' . $table . ($where ? ' WHERE ' .$where : ''); $stmt = $this->query($sql); $res = $stmt->rowCount(); return $res; } /** * 修改 * * @param string $table * @param array $bind * @param string $where * @return boolean */ public function update($table, array $bind, $where = '') { $set = array(); foreach ($bind as $k => $v) { $bind[':' . $k] = $v; $v = ':' . $k; $set[] = $k . ' = ' . $v; unset($bind[$k]); } $where = $this->_whereExpr($where); $sql = 'UPDATE ' . $table . ' SET ' . implode(',', $set) . (($where) ? ' WHERE ' . $where : ''); $stmt = $this->query($sql, $bind); $res = $stmt->rowCount(); return $res; } /** * 获取新增ID * * @param string $tableName * @param string $primaryKey * @return string */ public function lastInsertId() { return (string) $this->db->lastInsertId(); } public function query($sql, $bind = array()) { if(!is_array($bind)){ $bind = array($bind); } $stmt = $this->prepare($sql); $stmt->execute($bind); $stmt->setFetchMode($this->_fetchMode); return $stmt; } public function prepare($sql = '') { if(empty($sql)){ return false; } $this->statement = $this->db->prepare($sql); return $this->statement; } public function execute($param = '') { if(is_array($param)){ try { return $this->statement->execute($param); } catch (Exception $e) { return $e->getMessage(); } }else { try { return $this->statement->execute(); } catch (Exception $e) { return $e->getMessage(); } } } /** * * @param string $where * @return null|string */ protected function _whereExpr($where) { if(empty($where)){ return $where; } if(!is_array($where)){ $where = array($where); } $where = implode(' AND ', $where); return $where; } /** * 关闭数据库操作 */ public function close() { $this->_db = null; } }
配置
db.type = 'mysql' db.host = '127.0.0.1' db.username = 'root' db.password = '123456' db.dbname = 'test' db.charset = 'UTF8'
调用方法
class TestController extends Yaf_Controller_Abstract { public function indexAction() { $config = Yaf_Application::app()->getConfig()->db; $db = Db_Mysql::getInstance($config); $row = $db->fetchOne('select count(*) from `user`'); print_r($row);die; } }
结果
希望本文所述对大家PHP程序设计有所帮助。
Yaf框架封装的MySQL数据库操作示例
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doomsday0417声明:登载此文出于传递更多信息之目的,并不意味着赞同其观点或证实其描述。
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