Generate JSON Array from PHP SQL Loop - php

Question

I need to generate the following JSON from a PHP loop and SQL DB but I'm having trouble:
[
{
"ItemName": "Websites1",
"Websites1": [
{
"0": "1",
"ID": "1",
"1": "Essential",
"WebsiteName": "Essential 1",
"2": "EI",
"WebsiteCode": "EI"
},
{
"0": "2",
"ID": "2",
"1": "Icon Ibiza",
"WebsiteName": "Icon 1",
"2": "IC",
"WebsiteCode": "IC"
},
{
"0": "3",
"ID": "3",
"1": "So Ibiza",
"WebsiteName": "So 1",
"2": "SO",
"WebsiteCode": "SO"
}
]
},
{
"ItemName": "Websites2",
"Websites2": [
{
"0": "1",
"ID": "1",
"1": "Essential Ibiza",
"WebsiteName": "Essential 2",
"2": "EI",
"WebsiteCode": "EI"
},
{
"0": "2",
"ID": "2",
"1": "Icon Ibiza",
"WebsiteName": "Icon 2",
"2": "IC",
"WebsiteCode": "IC"
},
{
"0": "3",
"ID": "3",
"1": "So Ibiza",
"WebsiteName": "So 2",
"2": "SO",
"WebsiteCode": "SO"
}
]
}
]
I have the relevant data being returned from the DB into PHP fine but I can't work out how to generate the relevant key value pairs and nesting using PHP loops. The code I have so far is:
$this->db->sql = "SELECT ID AS ID, WebsiteName AS SelectText, WebsiteCode AS SelectValue FROM Banners_Websites ORDER BY WebsiteName";
$rs = $this->db->query($this->db->sql);
if ($this->db->row_count != 0) {
$response = array();
$json = array();
while ($row = $this->db->row_read($rs)) {
$json["ID"] = $row["ID"];
$json["SelectText"] = $row["SelectText"];
$json["SelectValue"] = $row["SelectValue"];
//$json[] = $row;
}
$response["Websites1"] = $json;
}
$rs = $this->db->query($this->db->sql);
if ($this->db->row_count != 0) {
$json2 = array();
while ($row = $this->db->row_read($rs)) {
$json2["ID"] = $row["ID"];
$json2["SelectText"] = $row["SelectText"];
$json2["SelectValue"] = $row["SelectValue"];
//$json[] = $row;
}
$response["Websites2"] = $json2;
}
return '[' . json_encode($response) . ']';
I'm obviously doing something very wrong as I only end up with one row for each query. The key value pairs are being overwritten with each loop. Also the nesting isn't correct. Sorry for such a dumb question but I've been trying to figure this out from info online and am stuck.
Thanks,
Noon.
EDIT - Managed to fix this using the annswer provided by Anushil Nandan below but the PHP needed a few extra tweaks to get the required format as folows:
// -----------------------------------------------------------------------------------------------
// BANNERMANGEMENTFORM
function bannerManagementJson($JsonItem) {
$this->db->connect();
$response = array();
//Generate Websites drop-down
$SqlStr = "SELECT WebsiteName AS SelectText, WebsiteCode AS SelectValue FROM Banners_Websites ORDER BY WebsiteName";
$response[] = $this->retrieveFormElementJson($SqlStr,'Websites',1);
//Generate Clients drop-down
$SqlStr = "SELECT ClientName AS SelectText, ID AS SelectValue FROM Banners_BannerClients ORDER BY ClientName";
$response[] = $this->retrieveFormElementJson($SqlStr,'Clients',2);
return json_encode($response);
}
// -----------------------------------------------------------------------------------------------
// RETRIEVEFORMELEMENTJSON
function retrieveFormElementJson($SqlStr,$ElementName,$SelectListNo) {
$this->db->sql = $SqlStr;
$rs = $this->db->query($this->db->sql);
if ($this->db->row_count != 0) {
$json = array();
while ($row = $this->db->row_read($rs)) {
$json[] = $row;
}
$arrayResponse = array("ItemName"=>$ElementName, "SelectList" . $SelectListNo=>$json);
}
return $arrayResponse;
}

Answer 1

your array is being overridden every time it's entering while loop
try:
$json1[] = array();
$json2[] = array();
$this->db->sql = "SELECT ID AS ID, WebsiteName AS SelectText, WebsiteCode AS SelectValue FROM Banners_Websites ORDER BY WebsiteName";
$rs = $this->db->query($this->db->sql);
if ($this->db->row_count != 0) {
$response = array();
$json[] = array();
while ($row = $this->db->row_read($rs)) {
$json[]["ID"] = $row["ID"];
$json[]["SelectText"] = $row["SelectText"];
$json[]["SelectValue"] = $row["SelectValue"];
//$json[] = $row;
}
$response["Websites1"] = $json;
}
$rs = $this->db->query($this->db->sql);
if ($this->db->row_count != 0) {
$json2[] = array();
while ($row = $this->db->row_read($rs)) {
$json2[]["ID"] = $row["ID"];
$json2[]["SelectText"] = $row["SelectText"];
$json2[]["SelectValue"] = $row["SelectValue"];
//$json[] = $row;
}
$response["Websites2"] = $json2;
}
return '[' . json_encode($response) . ']';