namespace mysqli;
//建表语句:
/*
CREATE TABLE `t_category` (
`id` int(11) NOT NULL PRIMARY KEY AUTO_INCREMENT,
`name` varchar(50) NOT NULL ,
`createtime` date NOT NULL ,
`status` int(11) NOT NULL,
`state` int(11) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
*/
return [
'type'=>$type ?? 'mysql',
'host'=>$host ?? 'localhost',
'dbname'=>$dbname ?? 'php7',
'charset'=>$charset ?? 'utf8',
'port'=>$port ?? '3306',
'username'=>$username ?? 'root',
'password'=>$password ?? ''
];
namespace mysqli;
$config=require __DIR__.'/database.php';
//mysqli连接四大参数:host,username,password,dbname;
extract($config);//将关联数组的键值对改为键名为变量名的名值对;
//连接
$mysqli=new \mysqli($host, $username, $password,$dbname);
if($mysqli->connect_errno) echo $mysqli->connect_error;
//设置客户端默认的字符编码集:
$mysqli->set_charset($charset);
var_dump($mysqli);
namespace mysqli;
//1.连接数据库-操作数据库-关闭数据库;
require 'connect1.php';
$o=['c6','20200515',1,1];
array_walk($o,function (&$o,$k,$length){
if($k<$length-2){
$o="'$o'";
}
},count($o));
$data=implode(',',$o);
$sql="INSERT t_category (`name`,`createtime`,`state`,`status`) VALUES($data)";
if($mysqli->query($sql)){
if($mysqli->affected_rows>0){
echo '成功添加了'.$mysqli->affected_rows.'条记录,心中记录主键ID:'.$mysqli->insert_id;
}else {
die('添加失败'.$mysqli->errno.':'.$mysqli->errno);
}
}
//关闭链接【可选】;
$mysqli->close();
namespace mysqli;
//1.连接数据库-操作数据库-关闭数据库;
require 'connect1.php';
$sql='SELECT * FROM `t_category` WHERE `id`=1';
$res=$mysqli->query($sql);
//fetch_array:返回一条记录,指针下移1;所以在使用前,需要指针复位
$res->data_seek(0);
$res1=$res->fetch_array(MYSQLI_ASSOC);//索引部分参数:MYSQLI_NUM;全部:BOTH
//多条:fetch_all(MYSQLI_ASSOC);
//严谨写法
if($res && $res->num_rows>0){
var_dump($res1);
}else {
echo '无记录';
}
echo '<hr>';
//关闭链接【可选】;
$res->free_result();
$mysqli->close();
namespace mysqli;
//1.连接数据库-操作数据库-关闭数据库;
require 'connect1.php';
$o=['name'=>'c7','createtime'=>'20200515','status'=>1,'state'=>1];
array_walk($o,function (&$o,$k,$length){
if($k<$length-2){
$o="`$k`='$o'";
}
},count($o));
$data=implode(',',$o);
$sql="UPDATE `t_category` SET".$data."WHERE `id`=7";
if($mysqli->query($sql)){
if($mysqli->affected_rows>0){
echo '成功更新了'.$mysqli->affected_rows.'条记录';
}else {
echo '没有更新任何记录';
}
}else {
die('更新失败'.$mysqli->errno.':'.$mysqli->errno);
}
//关闭链接【可选】;
$mysqli->close();
namespace mysqli;
//1.连接数据库-操作数据库-关闭数据库;
require 'connect1.php';
$sql="DELETE FROM `t_category` WHERE `id`=7";
if($mysqli->query($sql)){
if($mysqli->affected_rows>0){
echo '成功删除';
}else {
echo '没有删除任何记录';
}
}else {
die('删除失败'.$mysqli->errno.':'.$mysqli->errno);
}
//关闭链接【可选】;
$mysqli->close();