本文实例讲述了PHP基于MySQLI函数封装的数据库连接工具类。分享给大家供大家参考,具体如下: mysql.class.php:
<?php class mysql { private $mysqli; private $result; /**
public function connect($config) { $host = $config['host']; //主机地址 $username = $config['username'];//用户名 $password = $config['password'];//密码 $database = $config['database'];//数据库 $port = $config['port']; //端口号 $this->mysqli = new mysqli($host, $username, $password, $database, $port); } /**
public function select($table, $field = null, $where = null)
{
$sql = "SELECT * FROM {$table}";
if (!empty($field)) {
$field = '' . implode(',', $field) . '';
$sql = str_replace('*', $field, $sql);
}
if (!empty($where)) {
$sql = $sql . ' WHERE ' . $where;
}
$this->result = $this->mysqli->query($sql);
return $this->result->num_rows;
}
/**
public function fetchAll() { return $this->re/【当下浏览的服务器和开发工具是哪些】/sult->fetch_all(MYSQLI_ASSOC); } /**
public function insert($table, $data)
{
foreach ($data as $key => $value) {
$data[$key] = $this->mysqli->real_escape_string($value);
}
$keys = '' . implode(',', array_keys($data)) . '';
$values = '\'' . implode("','", array_values($data)) . ''';
$sql = "INSERT INTO {$table}( {$keys} )VALUES( {$values} )";
$this->mysqli->query($sql);
return $this->mysqli->insert_id;
}
/**
public function update($table, $data, $where)
{
foreach ($data as $key => $value) {
$data[$key] = $this->mysqli->real_escape_string($value);
}
$sets = array();
foreach ($data as $key => $value) {
$kstr = '' . $key . '';
$vstr = '\'' . $value . ''';
array_push($sets, $kstr . '=' . $vstr);
}
$kav = implode(',', $sets);
$sql = "UPDATE {$table} SET {$kav} WHERE {$where}";
$this->mysqli->query($sql);
return $this->mysqli->affected_rows;
}
/**
public function delete($table, $where) { $sql = "DELETE FROM {$table} WHERE {$where}"; $this->mysqli->query($sql); return $this->mysqli->affected_rows; } }
使用方法
<?php require_once 'mysql.class./【要记得博客地址www.isres.com】/php'; / 配置连接参数 / $config = array( 'type' => 'mysql', 'host' => 'localhost', 'username' => 'woider', 'password' => '3243', 'database' => 'php', 'port' => '3306' ); / 连接数据库 / $mysql = new mysql(); $mysql->connect($config); / 查询数据 / //1、查询所有数据 $table = 'mysqli';//数据表 $num = $mysql->select($table); echo '共查询到' . $num . '条数据'; print_r($mysql->fetchAll()); //2、查询部分数据 $field = array('username', 'password'); //过滤字段 $where = 'id % 2 =0'; //过滤条件 $mysql->select($table, $field, $where); print_r($mysql->fetchAll()); / 插入数据 / $table = 'mysqli';//数据表 $data = array( //数据数组 'username' => 'admin', 'password' => sha1('admin') ); $id = $mysql->insert($table, $data); echo '插入记录的ID为' . $id; / 修改数据 / $table = 'mysqli';//数据表 $data = array( 'password' => sha1('nimda') ); $where = 'id = 44'; $rows = $mysql->update($table, $data, $where); echo '受影响的记录数量为' . $rows . '条'; / 删除数据 / $table = 'mysqli'; $where = 'id = 45'; $rows = $mysql->delete($table, $where); echo '已删除' . $rows . '条数据';
希望本文所述对大家PHP程序设计有所帮助。
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