ขอถามเรื่องการใช้ foreach เพื่อ loop ข้อมูลจาก MYSQL มาใช้งานหน่อยครับ

[18] => Array
    (
        [config_id] => 19
        [config_name] => setting_general_website
        [config_option] => test
    )

[19] => Array
    (
        [config_id] => 20
        [config_name] => setting_general_email
        [config_option] => [email protected]
    )

foreach($config as $key => $row)
{
	$row['config_name'] = $row['config_option'];
}

	$arr = array();
	foreach($config as $key => $row)
	{
		$arr[$key][$row['config_name']] = $row['config_name'];
		$arr[$key][$row['config_option']] = $row['config_option'];
		
		echo $setting_general_email = $arr[19][$row['config_option']];
	}

$arr = array();
foreach($config as $key => $row)
{
	$arr[$key]=array( 
				'config_name'=>$row['config_name'],
				'config_option'=> $row['config_option']
			);
	
	echo $setting_general_email = $arr[$key]['config_option'];
}

$arr = array();
foreach($config as $key => $row)
{
	$arr[$key]=$row;	
	echo $setting_general_email = $arr[$key]['config_option'];
}

$arr = $config;
echo $setting_general_email = $arr[19]['config_option'];

<?php
$array=array(
	'config_name1' => array('19', 'setting_general_website', 'test1'),
	'config_name2' => array('20', 'setting_general_website', 'test2'),
	'config_name3' => array('21', 'setting_general_website', 'test3'),
); 
 
 foreach($array as $array =>$values)
 {
	 echo $array."<br>";
	 foreach($values as $key){
		 echo $key."<br>";
	 }
 }
?>