Create subset of php array and convert to json - php

Question

This is one of those that should be easy. I'm not even sure if "subset" is the right way to describe it.
My initial array looks like this:
array(3) { [0]=> array(5) { ["id"]=> string(1) "1" ["claim_id"]=> string(1) "1" ["price"]=> string(2) "50" ["date"]=> string(19) "2013-05-15 01:58:48" ["created"]=> string(19) "2013-05-15 01:58:48" } [1]=> array(5) { ["id"]=> string(2) "11" ["claim_id"]=> string(1) "1" ["price"]=> string(2) "45" ["date"]=> string(19) "2013-05-15 03:34:59" ["created"]=> string(19) "2013-05-15 03:37:01" } [2]=> array(5) { ["id"]=> string(2) "25" ["claim_id"]=> string(1) "1" ["price"]=> string(2) "50" ["date"]=> string(19) "2013-05-15 22:47:46" ["created"]=> string(19) "2013-05-15 22:52:02" } }
I'd ultimately like to end up with just the date and price values, swap them so that date is first in the array, reformat the date, and convert it to a json array that looks something like this:
[{"date":"Mar. 15","price":"50"},{"date":"Mar. 15","price":"45"},{"date":"Mar. 15","price":"50"}]
I ran a foreach statement to get at the data and reformat the date, then went out of my league with splice, unset, and other functions that took me in the wrong direction. Any ideas?

Answer 1

Try this
$array = array();
for($i = 0 ; $i<count($your_array);$i++) {
$a=array();
$a['date'] = $your_array[$i]['date'];
$a['price'] = date("F .j",strtotime($your_array[$i]["date"]));
array_push($array,$a);
}
json_encode($array);
Output
[{"date":"Mar. 15","price":"50"},{"date":"Mar. 15","price":"45"},{"date":"Mar. 15","price":"50"}]
Codepad

Answer 2

This should get you there
$ret = array();
foreach ($source as $rec){
$ret[] = array("date"=>$rec["date"], "price"=>$rec["price"]);
}
$json = json_encode($ret);

Answer 3

Create a quick function to create another array with only selected elements:
function datePriceToJson($array) {
$a = array();
foreach($array as $i => $a) {
$a[] = array("date" => $a['date'], "price" => $a['price']); //Creae a new array based on the one you want
}
return json_encode($a);
}
datePriceToJson($array);

Answer 4

You need to reconstruct array using correct foreach and the use json_encode to get the json
$req_array = array();
foreach($youArray as $value)
{
$temp = array();
$temp['date'] = $value['date'];
$temp['price'] = $value['price'];
$req_array[] = $temp;
}
$json = json_encode($req_array);
echo $json;
see demo
Hope it helps you

Answer 5

$infos =array(
array("id" =>"1","price"=>"50","date"=>"2013-05-15 01:58:48"),
array("id" =>"2","price"=>"55","date"=>"2013-06-15 01:58:48")
);
$i=0;
foreach ($infos as $info )
{
$infos[$i]["date"]= date("F .j",strtotime($info["date"]));
$i++;
}
echo json_encode($infos);