How to use the function inside the json_decode() using ci - php

Question

Here i have one array, in this array i have one more array called studentabsentId,
public function admin_getabsentlist()
{
$data = array(
"schoolId" => $_POST['schoolName'],
"classId" => $_POST['className'],
"sectionId" => $_POST['sectionName'],
"absentDate" => date("Y-m-d", strtotime($_POST['absentDate']))
);
$absentresponse= $this->Admin_attendance_model->admin_options_listdisplay($data);
$optionsList = array();
foreach($absentresponse as $hmres)
{
$hmparent['studentabsentId']=json_decode($hmres['studentAbsentId']);
$hmparent['studentAbsentDate']=$hmres['studentAbsentDate'];
array_push($optionsList,$hmparent);
}
//echo $json = json_encode($optionsList);
$return = array("status" => 1, "data" => $optionsList);
echo json_encode($return);
}
echo json_encode($return);
{
"status": 1,
"data": [
{
"studentabsentId": [
"1"
],
"studentAbsentDate": "2017-04-12"
}
]
}
upto now its working fine,now what i want means,studentabsentId 1 means what is his name,suppose studentabsentId 2 means what is name, for that purpose i written the function called getStudentnameById in helper/custom_helper.php.
So in my for each loop i added one more line like this
$hmparent['studentabsentName']=json_decode(getStudentnameById($hmres['studentAbsentId']));
But now i am getting the error of Undefined offset: 0,how can solve this error and , how to display the name
custom_helper.php
if ( ! function_exists('getStudentnameById')){
function getStudentnameById($id){
$ci =& get_instance();
$ci->load->database();
$ci->db->select('firstName');
$ci->db->where('student_id', $id);
$q = $ci->db->get('new_student')->result();
return $q[0]->firstName; // particulart filed
}
}
My updated code
print_r($absentresponse);
Array
(
[0] => Array
(
[absendId] => 2
[studentAbsentId] => ["1"]
[studentAbsentDate] => 2017-04-12
[schoolId] => 2
[classId] => 1
[sectionId] => 1
[reg_date] => 2017-04-13 01:01:14
[created_by] => kanniyappan#g2evolution.co.in
[status] => 0
)
)
Expected Results
{
"status": 1,
"data": [
{
"studentabsentId":"1"
"studentabsentName":"Kani"
"studentAbsentDate": "2017-04-12"
}
]
}

Answer 1

Your getStudentnameById returns a string supposedly, so why are you doing a json_decode on top of that. $hmparent['studentabsentName']=json_decode(getStudentnameById($hmres['studentAbsentId']));
Also check the return by that function. You should be able to debug this kind of code if you turned on your error_reporting which tells you the line at which error occurred, then var_dump all the variables that's relevant to it.