php实现的mysql封装类示例

发布于 2014-12-04 05:35:11 | 135 次阅读 | 评论: 0 | 来源: 网友投递

PHP（外文名: Hypertext Preprocessor，中文名：“超文本预处理器”）是一种通用开源脚本语言。语法吸收了C语言、Java和Perl的特点，入门门槛较低，易于学习，使用广泛，主要适用于Web开发领域。PHP的文件后缀名为php。

本文是一个php实现的mysql封装类示例，感兴趣的同学参考下。

php封装mysql类

<?php

class Mysql {
private $host;
private $user;
private $pwd;
private $dbName;
private $charset;

private $conn = null;

public function __construct() {

  $this->host = 'localhost';
  $this->user = 'root';
  $this->pwd = 'root';
  $this->dbName = 'test';

$this->connect($this->host,$this->user,$this->pwd);

$this->switchDb($this->dbName);

$this->setChar($this->charset);
}

//负责链接
private function connect($h,$u,$p) {
$conn = mysql_connect($h,$u,$p);
$this->conn = $conn;
}

//负责切换数据库
public function switchDb($db) {
$sql = 'use' . $db;
$this->query($sql);
}

//负责设置字符集
public function setChar($char) {
$sql = 'set names' . $char;
$this->query($sql);
}

//负责发送sql查询
public function query($sql) {
return mysql_query($sql,$this->conn);
}

//负责获取多行多列的select结果
public function getAll($sql) {
$list = array();

  $rs = $this->query($sql);
  if (!$rs) {
   return false;
  }

  while ($row = mysql_fetch_assoc($rs)) {
   $list[] = $row;
  }

return $list;
}

public function getRow($sql) {
$rs = $this->query($sql);

  if(!$rs) {
   return false;
  }

return mysql_fetch_assoc($rs);
}

public function getOne($sql) {
  $rs = $this->query($sql);
  if (!$rs) {
   return false;
  }
  return mysql_fetch_assoc($rs);

return $row[0];
}

public function close() {
mysql_close($this->conn);
}
}

echo '<pre>';
$mysql = new Mysql();
print_r($mysql);

$sql = "insert into stu values (4,'wangwu','99998')";

if($mysql->query($sql)){
echo "query成功";
}else {
echo "失败";
}

echo "<br />";

$sql = "select * from stu";
$arr = $mysql->getAll($sql);

print_r($arr);
?>

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