Creating Multiple JSON Object Elements Programmatically using PHP - php

Question

I need to create a JSON object, in PHP, with the following form
{
"Routes": [{
"route_ID": "49",
"geom": [{
"lat": "-30.63607",
"lng": "147.499935"
}, {
"lat": "-30.63631",
"lng": "147.499868"
}]
},
{
"route_ID": "50",
"geom": [{
"lat": "-30.63607",
"lng": "147.499935"
}, {
"lat": "-30.63631",
"lng": "147.499868"
}]
}
]
}
The problem with my code is that I can't seem to find a way of concatenating the JSON elements from the $jsonString, The code as it is just produces "route_ID": "50".
(Yes I agree there are a great many questions on stackoverflow on this question, but they just about all refer to single elements derived from a static array). By the way, I am given the $jsonString and need to preprocess it in the code below.
$jsonString = "[{\"route_ID\":\"49\",\"geom\":\"<LineString><coordinates>147.499935,-30.63607 <\\/coordinates><\\/LineString>\"},{\"route_ID\":\"50\",\"geom\":\"<LineString><coordinates>147.499935,-30.63607<\\/coordinates><\\/LineString>\"}]";
/* PHP Code */
$jsonArray = json_decode($jsonString, true);
$json = new stdClass();
$json_Routes = new stdClass();
$route_geom_Array = array();
foreach ($jsonArray as $record) {
print_r($record);
$geomString = $record["geom"];
$geomString = str_replace('<LineString><coordinates>', ' ', $geomString);
$geomString = str_replace('</coordinates></LineString>', ' ', $geomString);
$geomString = trim($geomString);
$route_geom_Array = explode(' ', $geomString);
for ($i = 0; $i < sizeof($route_geom_Array); $i++) {
$var = explode(',', $route_geom_Array[$i]);
$route_geom[] = array('lat' => $var[1], 'lng' => $var[0]); // lat long
}
$json->route_ID = $record["route_ID"]; //<- Problem area
$json->geom = $route_geom; //<- Problem area
}
$json_Routes->Routes = $json;
$jsonArray = json_encode($json_Routes);
echo $jsonArray;
exit ();`
Can someone give me a clue on how do this.
Thanks

Answer 1

You need to make $json_Routes->Routes an array and push the $json structures within the foreach block, e.g.:
$json_Routes->Routes = [];
foreach ($jsonArray as $record) {
// Existing code ...
$json_Routes->Routes[] = $json;
}

Answer 2

You need to push objects to array, here solution :
$jsonArray = json_decode($jsonString, true);
$json_Routes = new stdClass();
$route_Array = [];
$route_geom_Array = [];
$route_ID_Array = [];
$items = [];
$index = 0;
foreach ($jsonArray as $record) {
//print_r($record);
$geomString = $record["geom"];
$geomString = str_replace('<LineString><coordinates>', ' ', $geomString);
$geomString = str_replace('</coordinates></LineString>', ' ', $geomString);
$geomString = trim($geomString);
$route_geom_Array = explode(' ', $geomString);
for ($i = 0; $i < sizeof($route_geom_Array); $i++) {
$var = explode(',', $route_geom_Array[$i]);
$route_geom[] = array('lat' => $var[1], 'lng' => $var[0]); // lat long
}
$json = new stdClass();
$json->route_ID = $record["route_ID"]; //<- Problem area
$json->geom = $route_geom; //<- Problem area
array_push($route_Array,$json);
}
$json_Routes->Routes = $route_Array;
$result = json_encode($json_Routes);
echo $result;
exit();