首先创建数据库和表,代码如下:

/*创建数据库*/ 
CREATE DATA  IF NOT EXISTS `test`; 
/*选择数据库*/ 
USE `test`; 
/*创建表*/ 
CREATE TABLE IF NOT EXISTS `user` ( 
name varchar(50), 
age int 
); 
/*插入测试数据*/ 
INSERT INTO `user` (name, age) VALUES(\'harry\', 20), (\'tony\', 23), (\'harry\', 24); 

下面是php连接mysql的两只方法:

方法1:PHP原生连接方式

<?php 
$host = \'localhost\'; 
$data  = \'test\'; 
$username = \'root\'; 
$password = \'root\'; 
$selectName = \'harry\';//要查找的用户名,一般是用户输入的信息 
$connection = mysql_connect($host, $username, $password);//连接到数据库 
mysql_query(\"set names \'utf8\'\");//编码转化 
if (!$connection) { 
die(\"could not connect to the data .\\n\" . mysql_error());//诊断连接错误 
} 
$selectedDb = mysql_select_db($data );//选择数据库 
if (!$selectedDb) { 
die(\"could not to the data \\n\" . mysql_error()); 
} 
$selectName = mysql_real_escape_string($selectName);//防止SQL注入 
$query = \"select * from user where name = \'$selectName\'\";//构建查询语句 
$result = mysql_query($query);//执行查询 
if (!$result) { 
die(\"could not to the data \\n\" . mysql_error()); 
} 
while ($row = mysql_fetch_row($result)) { 
//取出结果并显示 
$name = $row[0]; 
$age = $row[1]; 
echo \"Name: $name \"; 
echo \"Age: $age \"; 
echo \"\\n\"; 
} 

 

方法2:PDO连接方式

<?php 
$host = \'localhost\'; 
$data  = \'test\'; 
$username = \'root\'; 
$password = \'root\'; 
$selectName = \'harry\';//要查找的用户名,一般是用户输入的信息 
$pdo = new PDO(\"mysql:host=$host;dbname=$data \", $username, $password);//创建一个pdo对象 
$pdo->exec(\"set names \'utf8\'\"); 
$sql = \"select * from user where name = ?\"; 
$stmt = $pdo->prepare($sql); 
$rs = $stmt->execute(array($selectName)); 
if ($rs) { 
// PDO::FETCH_ASSOC 关联数组形式 
// PDO::FETCH_NUM 数字索引数组形式 
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) { 
$name = $row[\'name\']; 
$age = $row[\'age\']; 
echo \"Name: $name \"; 
echo \"Age: $age \"; 
echo \"\\n\"; 
} 
} 
$pdo = null;//关闭连接 
收藏 打印