PHP PDO fetch 模式各种参数的输出结果一览


            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);    

/*   

array(   

   array(   

       'id' => '1',   

       'name' => 'HBO',   

       'method' => 'service',   

   ),   

   array(   

       'id' => '2',   

       'name' => '本周新片',   

       'method' => 'movie',   

   ),   

   array(   

       'id' => '3',   

       'name' => '热映中',   

       'method' => 'movie',   

   ),   

)   

*/    

    

    

    

$data = $dbAdapter->query("   

   SELECT name, method FROM category   

")->fetchAll(PDO::FETCH_COLUMN);    

    

//var_dump($data);    

/*   

array(   

   'HBO',   

   '本周新片',   

   '热映中',   

)   

*/    

    

    

    

$data = $dbAdapter->query("   

   SELECT id, name, method FROM category   

")->fetchAll(PDO::FETCH_UNIQUE | PDO::FETCH_ASSOC);    

    

//var_dump($data);    

/*   

array(   

   '1' => array(   

       'name' => 'HBO',   

       'method' => 'service',   

   ),   

   '2' => array(   

       'name' => '本周新片',   

       'method' => 'movie',   

   ),   

   '3' => array(   

       'name' => '热映中',   

       'method' => 'movie',   

   ),   

)   

*/    

    

    

    

$data = $dbAdapter->query("   

   SELECT method, id, name FROM category   

")->fetchAll(PDO::FETCH_UNIQUE | PDO::FETCH_ASSOC);    

    

//var_dump($data);    

/*   

array(   

   'service' => array(   

       'id' => '1',   

       'name' => 'HBO',   

   ),   

   'movie' => array(   

       'id' => '3',   

       'name' => '热映中',   

   ),   

)   

*/    

    

    

    

$data = $dbAdapter->query("   

   SELECT id, name, method FROM category   

")->fetchAll(PDO::FETCH_UNIQUE | PDO::FETCH_COLUMN);    

    

//var_dump($data);    

/*   

array(   

   '1' => 'HBO',   

   '2' => '本周新片',   

   '3' => '热映中',   

)   

*/    

    

    

    

$data = $dbAdapter->query("   

   SELECT method, name, id FROM category   

")->fetchAll(PDO::FETCH_UNIQUE | PDO::FETCH_COLUMN);    

    

//var_dump($data);    

/*   

array(   

   'service' => 'HBO',   

   'movie' => '热映中',   

)   

*/    

    

    

    

    

$data = $dbAdapter->query("   

   SELECT method, id, name FROM category   

")->fetchAll( PDO::FETCH_ASSOC | PDO::FETCH_GROUP);    

    

//var_dump($data);    

/*   

array(   

   'service' => array(   

       array(   

           'id' => '1'   

           'name' => 'HBO'   

       ),   

   )   

   'movie' => array(   

       array(   

         'id' => '2'   

         'name' => '本周新片'   

       ),   

       array(   

         'id' => '3'   

         'name' => '热映中'   

       ),   

   )   

)   

*/    

    

    

    

    

$data = $dbAdapter->query("   

   SELECT method, name, id FROM category   

")->fetchAll(PDO::FETCH_GROUP | PDO::FETCH_COLUMN);    

    

//var_dump($data);    

/*   

array(   

   'service' => array(   

       'HBO'   

   ),   

   'movie' => array(   

       '本周新片'   

       '热映中'   

   ),   

)   

*/    

    

    

    

    

    

$data = $dbAdapter->query("   

   SELECT id, name, method FROM category   

")->fetchAll(PDO::FETCH_OBJ);    

    

//var_dump($data);    

/*   

array(   

   stdClass{   

       public $id = '1';   

       public $name = 'HBO';   

       public $method = 'service';   

   },   

   stdClass{   

       public $id = '2';   

       public $name = '本周新片';   

       public $method = 'movie';   

   },   

   stdClass{   

       public $id = '3';   

       public $name = '热映中';   

       public $method = 'movie';   

   },   

)   

*/    

    

    

    

    

    

    

    

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);    

/*   

array(   

   Category_1{   

       public $id = '1';   

       public $name = 'HBO';   

       public $method = 'service';   

   },   

   Category_1{   

       public $id = '2';   

       public $name = '本周新片';   

       public $method = 'movie';   

   },   

   Category_1{   

       public $id = '3';   

       public $name = '热映中';   

       public $method = 'movie';   

   },   

),   

*/    

    

    

    

    

    

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);    

/*   

array(   

   Category_2{   

       public $name = 'HBO';   

       public $method = 'service';   

   },   

   Category_2{   

       public $name = '本周新片';   

       public $method = 'movie';   

   },   

   Category_2{   

       public $name = '热映中';   

       public $method = 'movie';   

   },   

)   

*/