PDO 的 fetch 模式功能实在是太方便了，但每次要产生想要的结果都要试太麻烦了，这里列出可能的组合。
复制代码 代码如下:
<?php
$dbAdapter = new PDO("mysql:host=localhost;dbname=test", "root", "1234");
$dbAdapter->exec("SET NAMES 'utf8';");

$data = $dbAdapter->query("
SELECT id, name, method FROM category
")->fetchAll(PDO::FETCH_ASSOC);

//var_dump($data);




$data = $dbAdapter->query("
SELECT name, method FROM category
")->fetchAll(PDO::FETCH_COLUMN);

//var_dump($data);




$data = $dbAdapter->query("
SELECT id, name, method FROM category
")->fetchAll(PDO::FETCH_UNIQUE | PDO::FETCH_ASSOC);

//var_dump($data);




$data = $dbAdapter->query("
SELECT method, id, name FROM category
")->fetchAll(PDO::FETCH_UNIQUE | PDO::FETCH_ASSOC);

//var_dump($data);




$data = $dbAdapter->query("
SELECT id, name, method FROM category
")->fetchAll(PDO::FETCH_UNIQUE | PDO::FETCH_COLUMN);

//var_dump($data);




$data = $dbAdapter->query("
SELECT method, name, id FROM category
")->fetchAll(PDO::FETCH_UNIQUE | PDO::FETCH_COLUMN);

//var_dump($data);





$data = $dbAdapter->query("
SELECT method, id, name FROM category
")->fetchAll( PDO::FETCH_ASSOC | PDO::FETCH_GROUP);

//var_dump($data);





$data = $dbAdapter->query("
SELECT method, name, id FROM category
")->fetchAll(PDO::FETCH_GROUP | PDO::FETCH_COLUMN);

//var_dump($data);






$data = $dbAdapter->query("
SELECT id, name, method FROM category
")->fetchAll(PDO::FETCH_OBJ);

//var_dump($data);








class Category_1 {}

$data = $dbAdapter->query("
SELECT id, name, method FROM category
")->fetchAll(PDO::FETCH_CLASS | PDO::FETCH_PROPS_LATE, "Category_1");

//var_dump($data);






class Category_2 {
public $name;
public $method;

public function __construct() {}
public function __set($name, $value ){}
}

$data = $dbAdapter->query("
SELECT id, name, method FROM category
")->fetchAll(PDO::FETCH_CLASS | PDO::FETCH_PROPS_LATE, "Category_2");

//var_dump($data);