pashted

Notice: Array to string conversion in C:\xampp\htdocs\test.php on line 15
Call Stack
#	Time	Memory	Function	Location
1	0.0003	389704	{main}( )	...\test.php:0

foreach ($add["People"] as $index => $value) {
    $add['People'][$index]['last_name'] = "Gav";
}

{"People":[{"first":"Viktor","last_name":"Gav"},{"first":"Viktor","last_name":"Gav"},{"first":"Viktor","last_name":"Gav"}]}