json,serialze之格式

<?php 
echo 'array-json:' . "
";
$arr = array('key1'=>'value1', 'key2' => 'value2', 'aa');
echo json_encode($arr); 
/*
{
	"key1":"value1",
	"key2":"value2",
	"0":"aa"
}
*/
echo "
";

$arr2 = array('key1'=>'value1', 'kk'=>array('key2'=>'value2', 'key3'=>'value3'));
echo json_encode($arr2); 
/*
{
	"key1":"value1",
	"kk":
		{
			"key2":"value2",
			"key3":"value3"
			}
}
*/
echo "
" . 'json-object' . "
";

class t
{
	public $name = 'lin3615';
	function ok()
	{
		$this->name = 'new lin3615';
		return $this->name;
	}
}
$t = new t();

echo json_encode($t);
/*
{
	"name":"lin3615"
}
*/
echo "
" . json_encode($t->ok());
// "new lin3615"
echo "
";
$sss = '{"bar":"value"}';
print_r(json_decode($sss, true));
echo "
";
$ny = array('a', 'b', 'c');
print_r(json_encode($ny));
/*
[
	"a",
	"b",
	"c"
]
*/

/*
总结:由于json只支持索引数据，不支持关联数组，当为关联数组时，会转化为对象
{}的形式，[]索引数组的形式
*/


// 序列化数据与对象

echo 'serialize-array:' . "<br />";
$arr = array('key1'=>'value1', '$key2'=>'value2', 'aa');
echo serialize($arr);
// a:3:{s:4:"key1";s:6:"value1";s:5:"$key2";s:6:"value2";i:0;s:2:"aa";}
echo "<br />serialize-object:<br />";
class test
{
public $name='lin3615';
public $age = 27;
function ok()
{
return 1;
}
function nn()
{

}
}

$t = new test();
echo serialize($t);
// O:4:"test":2:{s:4:"name";s:7:"lin3615";s:3:"age";i:27;}

echo serialize($t->ok());
// i:1;
echo serialize($t->nn());
// N;