无为清净楼资源网

PHP7原生MySQL数据库操作实现代码
网络编程 2024/9/25 佚名
3 2
无为清净楼资源网 Design By www.qnjia.com

php7中mysql的连接与使用与PHP5中大不相同

PHP5中mysql_connect()等函数大多被PHP7中类的成员函数所代替。PHP5中连接mysql是过程性的，而PHP7中强调了类的使用与面向对象的方法

$user = new mysqli();

//Connect to mysql
$user->connect("localhost", "root", "q721@Ms67", "Student");

mysql的连接被mysqli类所替代

//Search in mysql
$query = 'SELECT * FROM users';
//Use a variable to save result
$result = $user->query($query);

查询语句也变成了类的成员函数

连接到 MySQL服务器

mysqli_connect(host, username, password [,dbname] [,port]);
- 参数：
host：MySQL服务器。可以包含端口号，默认值为“localhost:3306”
username：用户名。默认值是服务器进程所有者的用户名；
password：密码。
dbname：数据库名称。
port：MySQL服务器的端口号，默认为3306。
- 返回值：如果连接成功，则返回 mysqli 连接对象。如果失败，则返回 false。

实例代码一

<"localhost", "root", "password", "testgame");
 if(!$mysqli) {
  echo"database error";
 }else{
  echo"php env successful";
 }
 $mysqli->close();
""这样哦


代码二





<"Can't connect to MySQL Server. Errorcode: %s ", mysqli_connect_error());
exit;
}else
echo '数据库连接上了！';

/* Close the connection 关闭连接*/
mysqli_close($link);
"htmlcode">



<"localhost";
$username = "root";
$password = "root";

$dbname = "myDB";

// 创建连接

# Tip: 如果你使用其他端口（默认为3306），为数据库参数添加空字符串，如: new mysqli("localhost", "username", "password", "", port)
$conn = new mysqli($servername, $username, $password,$dbname);

// 检测连接
if ($conn->connect_error) {
die("连接失败: " . $conn->connect_error);
}
echo "连接成功";

$conn->close();
"htmlcode">



$sql = "CREATE DATABASE myDB3";
if (mysqli_query($conn, $sql)) {
echo "数据库创建成功";
} else {
echo "Error creating database: " . mysqli_error($conn);
}





方法二:





// 检测连接
if ($conn->connect_error) {
　　die("连接失败: " . $conn->connect_error);
}
echo "连接成功";

$sql = "CREATE DATABASE myDB2";
if ($conn->query($sql) === TRUE) {
　　echo "数据库创建成功";
} else {
　　echo "Error creating database: " . $conn->error;
}






创建表的方法：


方法一:





// 使用 sql 创建数据表
$sql = "CREATE TABLE MyGuests (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP
)";

if (mysqli_query($conn, $sql)) {
echo "数据表 MyGuests 创建成功";
} else {
echo "创建数据表错误: " . mysqli_error($conn);
}






方法二:





// 使用 sql 创建数据表
$sql = "CREATE TABLE MyGuests2 (
id INT(6) UNSIGNED AUTO_INCREMENT PRIMARY KEY,
firstname VARCHAR(30) NOT NULL,
lastname VARCHAR(30) NOT NULL,
email VARCHAR(50),
reg_date TIMESTAMP
)";

if ($conn->query($sql) === TRUE) {
echo "Table MyGuests created successfully";
} else {
echo "创建数据表错误: " . $conn->error;
}






插入数据的方法:


方法一:





$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('John', 'Doe', 'john@example.com')";

if (mysqli_query($conn, $sql)) {
echo "新记录插入成功";
} else {
echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}






方法二:





$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('John', 'Doe', 'john@example.com')";

if ($conn->query($sql) === TRUE) {
echo "新记录插入成功";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}






插入多条数据的方法:


方法一:





$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('John', 'Doe', 'john@example.com');";
$sql .= "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('Mary', 'Moe', 'mary@example.com');";
$sql .= "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('Julie', 'Dooley', 'julie@example.com')";

if (mysqli_multi_query($conn, $sql)) {
echo "新记录插入成功";
} else {
echo "Error: " . $sql . "<br>" . mysqli_error($conn);
}






方法二：





$sql = "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('22', 'Doe', 'john@example.com');";
$sql .= "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('22', 'Moe', 'mary@example.com');";
$sql .= "INSERT INTO MyGuests (firstname, lastname, email)
VALUES ('22', 'Dooley', 'julie@example.com')";

if ($conn->multi_query($sql) === TRUE) {
echo "新记录插入成功";
} else {
echo "Error: " . $sql . "<br>" . $conn->error;
}






查询数据库的方法：


方法一:





$sql = "SELECT id, firstname, lastname FROM MyGuests";
$result = mysqli_query($conn, $sql);

if (mysqli_num_rows($result) > 0) {
// 输出数据
while($row = mysqli_fetch_assoc($result)) {
echo "id: " . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "<br>";
}
} else {
echo "0 结果";
}






方法二：





$sql = "SELECT id, firstname, lastname FROM MyGuests";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
// 输出数据
while($row = $result->fetch_assoc()) {
echo "id: " . $row["id"]. " - Name: " . $row["firstname"]. " " . $row["lastname"]. "<br>";
}
} else {
echo "0 结果";
}






看到这里小编再为大家分享一个整理好的类库





<"Can not connect to MySQL server");
  }
  
		if($this->server_info() > '5.0'){
			mysqli_query($this->link, "SET sql_mode=''");
		}
		/*
		if($dbname) {
			if (!@mysqli_select_db($dbname, $this->link)){
				$this->halt('Cannot use database '.$dbname);
			}
		}*/
	}

	function select_db($dbname) {
		$this->dbname = $dbname;
		if (!@mysqli_select_db($dbname, $this->link)){
			$this->halt('Cannot use database '.$dbname);
		}
	}

	function server_info() {
		return mysqli_get_server_info($this->link);
	}
	
	function version() {
		return mysqli_get_server_info($this->link);
	}
	
	
	function insert($tableName, $column = array()) {
   $columnName = "";
   $columnValue = "";
   foreach ($column as $key => $value) {
    $columnName .= $key . ",";
    $columnValue .= "'" . $value . "',";
   }
   $columnName = substr($columnName, 0, strlen($columnName) - 1);
   $columnValue = substr($columnValue, 0, strlen($columnValue) - 1);
   $sql = "INSERT INTO $tableName($columnName) VALUES($columnValue)";
   $this->query($sql);
  }
	 
	function update($tableName, $column = array(), $where = "") {
   $updateValue = "";
   foreach ($column as $key => $value) {
    $updateValue .= $key . "='" . $value . "',";
   }
   $updateValue = substr($updateValue, 0, strlen($updateValue) - 1);
   $sql = "UPDATE $tableName SET $updateValue";
   $sql .= $where " WHERE $where" : null;
   $this->query($sql);
  }
	 function delete($tableName, $where = ""){
   $sql = "DELETE FROM $tableName";
   $sql .= $where " WHERE $where" : null;
   $this->query($sql);
  }
	 function select($tableName, $columnName = "*", $where = "") {
   $sql = "SELECT " . $columnName . " FROM " . $tableName;
   $sql .= $where " WHERE " . $where : null;
   $this->query($sql);
  }
	 function get_all($sql,$result_type = MYSQLI_ASSOC) {
  $query = $this->query($sql);
  $i = 0;
  $rt = array();
  while($row =& mysqli_fetch_array($query,$result_type)) {
   $rt[$i]=$row;
   $i++;
  }
  //$this->write_log("获取全部记录 ".$sql);
  return $rt;
 }


 function fetchRow($query){
  return mysqli_fetch_assoc($query);
 }
	
	function query($sql) {
  //$this->write_log("查询 ".$sql);
		mysqli_query($this->link,"set names utf8");
  $query = mysqli_query($this->link,$sql);
  //if(!$query) $this->halt('Query Error: ' . $sql);
  return $query;
 }
	//获取第一个字段值
 function getOne($sql, $limited = false){
  if ($limited == true){
   $sql = trim($sql . ' LIMIT 1');
  }

  $res = $this->query($sql);
  if ($res !== false){
   $row = mysqli_fetch_row($res);

   if ($row !== false){
    return $row[0];
   }else{
    return '';
   }
  }else{
   return false;
  }
 }
	
	
	function fetch_array($query, $result_type = MYSQLI_ASSOC) {
  return mysqli_fetch_array($query, $result_type);
 }
	
	//输出记录
	function fetch_first($sql) {
		$res=$this->query($sql);
		return $this->fetch_array($res,MYSQLI_ASSOC);
	}
	
	// 取得一条数据记录
	function get_one($sql, $result_type = MYSQLI_ASSOC){
		$result = $this->query($sql);
		$record = $this->fetch_array($result, $result_type);
		return $record;
	}

 function getRow($sql, $limited = false){
  if ($limited == true){
   $sql = trim($sql . 'LIMIT 1');
  }

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

 
 //取影响条数 
	function affected_rows() {
		return mysqli_affected_rows($this->link);
	}
	//从结果集中取得一行作为枚举数组 
	function fetch_row($query) {
		return mysqli_fetch_row($query);
	}
	// 结果条数
	function num_rows($query) {
		return mysqli_num_rows($query);
	}
	// 取字段总数 
	function num_fields($query) {
		return mysqli_num_fields($query);
	}
	// 返回查询结果
	function result($query, $row) {
		$query = mysqli_result($query, $row);
		return $query;
	}
	//释放结果集 
	function free_result($query) {
		return mysqli_free_result($query);
	}
	//返回自增ID 
	function insert_id() {
		return ($id = mysqli_insert_id($this->link)) >= 0 "SELECT last_insert_id()"), 0);
	}


	function close() {
		return mysqli_close($this->link);
	}

 function error() {
  return (($this->link) "<html>\n<head>\n";
		$msg .= "<meta content=\"text/html; charset=$charset\" http-equiv=\"Content-Type\">\n";
		$msg .= "<style type=\"text/css\">\n";
		$msg .= "body,p,pre {\n";
		$msg .= "font:12px Verdana;\n";
		$msg .= "}\n";
		$msg .= "</style>\n";
		$msg .= "</head>\n";
		$msg .= "<body bgcolor=\"#FFFFFF\" text=\"#000000\" link=\"#006699\" vlink=\"#5493B4\">\n";
		$msg .= "<b>error</b>: ".htmlspecialchars($this->error())."\n<br />";
		$msg .= "<b>error number</b>: ".$this->errno()."\n<br />";
		$msg .= "<b>Date</b>: ".date("Y-m-d @ H:i")."\n<br />";
		$msg .= "<b>Script File</b>: http://".$_SERVER['HTTP_HOST'].getenv("REQUEST_URI")."\n<br />";

		$msg .= "</body>\n</html>";
		echo $msg;
		exit;
	}
}
?>





 以上就是PHP7原生MySQL数据库操作实现代码的详细内容，更多关于php7 数据库操作方法的资料请关注其它相关文章！


                                

                                

                                     

                                

                                    标签：
                                        
php7,数据库操作,php7,数据库

                                     

                                
无为清净楼资源网 Design By www.qnjia.com
广告合作：本站广告合作请联系QQ：858582 申请时备注：广告合作（否则不回）
免责声明：本站文章均来自网站采集或用户投稿，网站不提供任何软件下载或自行开发的软件！ 如有用户或公司发现本站内容信息存在侵权行为，请邮件告知！ 858582#qq.com
无为清净楼资源网 Design By www.qnjia.com
www.qnjia.com 无为清净楼资源网
139,976互联网资源
144,792高清电影
21,817无损音乐
631,128技术资源

更新日志

友情链接

杰晶网络 DDR爱好者之家 桃源资源网 杰网资源 富贵资源网 南强小屋 铁雪资源网 幽灵资源网 万梅资源网 狼山资源网 白云岛资源网 昆仑资源网 相思资源网 明霞山资源网 内蒙古资源网 黑松山资源网 茶园资源网 饿虎岗资源网 大旗谷资源网 常春岛资源网 岱庙资源网 兴国资源网 快活林资源网 蝙蝠岛资源网 帝王谷资源网 白云城资源网 伏龙阁资源网 清风细雨楼 天枫庄资源网 圆月山庄资源网 无争山庄资源网 神水资源网 移花宫资源网 神剑山庄资源网 无为清净楼资源网 金钱帮资源网 丐帮资源网 华山资源网 极乐门资源网 小李飞刀资源网 凤求凰客栈 风云阁资源网 金狮镖局 鸳鸯亭资源网 千金楼资源网 更多链接