这是一个使用PDO连接到数据库，告诉它引发Exception（而不是PHP错误）（将帮助您调试）以及使用参数化语句而不是将动态值替换为查询本身的示例（强烈建议）：
// $attrs is optional, this demonstrates using persistent connections,
// the equivalent of MysqL_pconnect
$attrs = array(PDO::ATTR_PERSISTENT => true);
// connect to PDO
$pdo = new PDO("MysqL:host=localhost;dbname=test", "user", "password", $attrs);
// the following tells PDO we want it to throw Exceptions for every error.
// this is far more useful than the default mode of throwing PHP errors
$pdo->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
// prepare the statement. the place holders allow PDO to handle substituting
// the values, which also prevents sql injection
$stmt = $pdo->prepare("SELECT * FROM product WHERE productTypeId=:productTypeId AND brand=:brand");
// bind the parameters
$stmt->bindValue(":productTypeId", 6);
$stmt->bindValue(":brand", "Slurm");
// initialise an array for the results
$products = array();
if ($stmt->execute()) {
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) {
$products[] = $row;
}
}
// set PDO to null in order to close the connection
$pdo = null;
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