Pass new php array key into json - php

Question

I have 2 table users(id,userid,fn,ln) and userdetails(id,userid,image,history,location,activity)
And i have written a query for first table to retrieve all the data and i want only history and location ,from second table.
i have retrieved the array and i am sending it to json_encode.
Now i want to retrieve the history,location and create a new key History and i want to add history location values to history key.
I need a query and json format for these.
For particular user i need to retrieve is own history
In both tables user id in common
Thanks in advance
$sth = mysql_query("SELECT * FROM users");$result = mysql_fetch_assoc($sth);
$i=0;
foreach($result as $data) {
$final_array[$i]['id'] = $data['id'];
$final_array[$i]['email'] = $data['email'];
$final_array[$i]['fname'] = $data['fname'];
$final_array[$i]['lname'] = $data['lname'];
$sth2 = mysql_query("SELECT id,places,act FROM user_dates WHERE user_id= '".$data['email']."'");
$result2 = mysql_fetch_assoc($sth2);
$j=0;
$history_array = array();
foreach($result2 as $data2) {
$history_array[$j] = array("id" => $data2['id'],"places" => $data2['places'], "act " => $data2['act ']);
$j++;
}
$final_array[$i]['history'] = $history_array;
$i++;
}
echo json_encode($final_array);
[
{
"id": "81",
"user_id": "2011",
"fn": "asd.",
"ln": "wer",
"History": [
{
"id": "350",
"history": "make1",
"Location": "qwe"
}
]
},
{
"id": "82",
"user_id": "2012",
"fn": "asd1",
"ln": "wer1",
"History": [
{
"id": "350",
"history": "make2",
"Location": "qwe2"
}
]
}
]

Answer 1

Userdetails table contains multiple records per user. So you need to do sub query and get the results and then form a mulch-dimensional array. Finally, encode as a JSON.
$sth = $dbh->prepare("SELECT * FROM users");
$sth->execute();
$result = $sth->fetchAll();
$i=0;
foreach($result as $data) {
$final_array[$i]['id'] = $data['id'];
$final_array[$i]['userid'] = $data['userid'];
$final_array[$i]['fn'] = $data['fn'];
$final_array[$i]['ln'] = $data['ln'];
$sth2 = $dbh->prepare("SELECT location,activity FROM userdetails WHERE userid= ".$data['id']."");
$sth2->execute();
$result2 = $sth2->fetchAll();
$j=0;
$history_array = array();
foreach($result2 as $data2) {
$history_array[$j] = array("location" => $data2['location'], "activity " => $data2['activity ']);
$j++;
}
$final_array[$i]['history'] = $history_array;
$i++;
}
echo json_encode($final_array);