PHP中数组转JSon和JSon转数组的实现

数组转JSon数据：

$array_1 = array(); //一维数组
	$array_2 = array(); //多维数组
	$array_1["username"]="ericwolf";
	$array_1["age"]=25;

	$array_2["menber"]["aa"]["username"]="ericwolf";
	$array_2["menber"]["aa"]["age"]=25;
	$array_2["menber"]["bb"]["username"]="eeee";
	$array_2["menber"]["bb"]["age"]=22;

	print_r($array_2);
	$jsonObj_1 = json_encode($array_1);
	$jsonObj_1 = json_encode($array_2);

$jsonStr = "{"key":"value","key1":"value1"}";
	$json2Array = json_decode($jsonStr,true);
	foreach($json2Array as $key=>$val) {
		echo $key."=".$val."<br/>";
	}