After conversion to PDO data is not displayed at ListView - php

Question

I already create an apps that contain ListView. I uses PHP to connect between android and database. FOr now, I use MySQLi and it works. But when I convert to PDO, the data not displayed. I uses 'Log.d' to trace what the data got. Below is the result:
MySQLi (No error) - {"data":[{"report_id":19,"task_name":"ngantuk","badgeid":"12345","report_date":"04 Dec 2019",.......
PDO (not log show data)
Now, below is current code for MySQLi and PDO
MySQLi
<?php
require_once 'config.php';
if (mysqli_connect_errno()) {
echo "Failed to connect to MySQL: " . mysqli_connect_error();
die();
}
$badgeid = $_GET["badgeid"] ?? "";
$stmt = $conn->prepare("SELECT report_id, task_name, badgeid, report_date, photo_before, photo_after, report_status FROM report WHERE badgeid = '$badgeid' AND report_status = 'Pending';");
$stmt->execute();
$stmt->bind_result($report_id, $task_name, $badgeid, $report_date, $photo_before, $photo_after, $report_status);
$task = array();
while($stmt->fetch()){
$temp = array();
$temp['report_id'] = $report_id;
$temp['task_name'] = $task_name;
$temp['badgeid'] = $badgeid;
$booked = strtotime($report_date);
$report_date = date("d M Y", $booked);
$temp['report_date'] = $report_date;
$temp['photo_before'] = $photo_before;
$temp['photo_after'] = $photo_after;
$temp['report_status'] = $report_status;
array_push($task, $temp);
}
$response = array();
$response["data"] = $task;
echo json_encode($response);
?>
PDO
require_once 'configPDO.php';
$badgeid = $_GET["badgeid"] ?? "";
$stmt = $conn->prepare("SELECT report_id, task_name, badgeid, report_date, photo_before, photo_after, report_status FROM report WHERE badgeid = :badgeid AND report_status = 'Pending'");
$stmt->bindParam(':badgeid',$badgeid,PDO::PARAM_STR);
$stmt->execute();
$result = $stmt->fetch(PDO::FETCH_ASSOC);
$task = array();
while ($result) {
$temp = array();
$temp["data"] = $task;
array_push($task, $temp);
}
$response = array();
$response["data"] = $result;
echo json_encode($response);
?>
Does anyone know what is problem with my PDO code?

Answer 1

The mysqli code and PDO code are not the same. I copied the code from the mysqli version to the PDO version.
PDOStatement::fetch() gets one row at a time. When you take the results from fetch and put it into the condition of a while loop, you are creating an infinite loop which will eventually run out of memory.
require_once 'configPDO.php';
$badgeid = $_GET["badgeid"] ?? "";
$stmt = $conn->prepare("SELECT report_id, task_name, badgeid, report_date, photo_before, photo_after, report_status FROM report WHERE badgeid = :badgeid AND report_status = 'Pending'");
$stmt->bindParam(':badgeid',$badgeid,PDO::PARAM_STR);
$stmt->execute();
$task = [];
while ($result = $stmt->fetch(PDO::FETCH_ASSOC)) {
$temp = [];
$temp['report_id'] = $result['report_id'];
$temp['task_name'] = $result['task_name'];
$temp['badgeid'] = $result['badgeid'];
$booked = strtotime($result['report_date']);
$report_date = date("d M Y", $booked);
$temp['report_date'] = $result['report_date'];
$temp['photo_before'] = $result['photo_before'];
$temp['photo_after'] = $result['photo_after'];
$temp['report_status'] = $result['report_status'];
$task[] = $temp;
}
$response = [];
$response["data"] = $task;
echo json_encode($response);