mysqli和mysql和pdo查询

 

mysql

mysql_connect($db_host, $db_user, $db_password); 

mysql_select_db($dn_name); 

$result = mysql_query("SELECT `name` FROM `users` WHERE `location` = '$location'"); 

while ($row = mysql_fetch_array($result, MYSQL_ASSOC)) 

{ 

echo $row['name']; 

} 

mysql_free_result($result);

mysqli

$mysqli = new mysqli($db_host, $db_user, $db_password, $db_name); 

$sql = "INSERT INTO `users` (id, name, gender, location) VALUES (?, ?, ?, ?)"; 

$stmt = $mysqli->prepare($sql); 

$stmt->bind_param('dsss', $source_id, $source_name, $source_gender, $source_location);//四个参数 所以是dsss整形\字符串 

$stmt->execute(); 

$stmt->bind_result($id, $name, $gender, $location); 

while ($stmt->fetch()) 

{ 

echo $id . $name . $gender . $location; 

} 

$stmt->close(); 

$mysqli->close();

pdo

$dsn = "mysql:host=$db_host;dbname=$db_name"; 

$dbh = new PDO($dsn, $db_user, $db_password); 

$sql = "SELECT `name`, `location` FROM `users` WHERE `location` = ? , `name` = ?"; 

$sth = $dbh->prepare($sql); 

$sth->execute(array($location, $name)); 

$result = $sth->fetch(PDO::FETCH_OBJ); 

echo $result->name . $result->location; 

$dbh = NULL;