Ich kann nur die Tabellenüberschriften herunterladen, aber nicht die Daten aus der MySQL-Datenbank in FPDF

Question

Hier ist mein Code zum Herunterladen von MYSQL-Daten in PDF. Ich kann jedoch nur Tabellenüberschriften anzeigen, aber nicht die Daten in den Tabellen. Eine Reihe von Möglichkeiten versucht, aber nicht funktioniert. Ich bin mir nicht sicher, was ich falsch mache. Irgendjemand?

<?php 
ob_start(); 
require('fpdf/fpdf.php'); 


$servername = "localhost"; 
$username = "root"; 
$password = ""; 
$dbname = "test"; 

// Create connection 
$conn = new mysqli($servername, $username, $password, $dbname); 
// 

Check connection 
if ($conn->connect_error) { 
die("Connection failed: " . $conn->connect_error); 
} 

//Select the Products you want to show in your PDF file 
$result= "SELECT name, trans_id, amount FROM bustomer"; 
$number_of_products = mysqli_num_rows($result); 



//Initialize the 3 columns and the total 
$column_name = ""; 
$column_trans_id = ""; 
$column_amount = ""; 
$total = 0; 

//For each row, add the field to the corresponding column 
while($row = mysqli_fetch_array($result)) 
{ 
    $name = $row["name"]; 
    $trans_id = substr($row["trans_id"],0,20); 
    $amount = $row["amount"]; 
    $price_to_show = number_format($row["amount"],',','.','.'); 

    $column_name = $column_name.$name."\n"; 
    $column_trans_id = $column_trans_id.$trans_id."\n"; 
    $column_amount = $column_amount.$price_to_show."\n"; 

    //Sum all the Prices (TOTAL) 
    $total = $total+$real_price; 
} 
mysqli_close(); 

//Convert the Total Price to a number with (.) for thousands, and (,) for decimals. 
$total = number_format($total,',','.','.'); 

//Create a new PDF file 
$pdf=new FPDF(); 
$pdf->AddPage(); 

//Fields Name position 
$Y_Fields_Name_position = 20; 
//Table position, under Fields Name 
$Y_Table_Position = 26; 

//First create each Field Name 
//Gray color filling each Field Name box 
$pdf->SetFillColor(232,232,232); 
//Bold Font for Field Name 
$pdf->SetFont('Arial','B',12); 
$pdf->SetY($Y_Fields_Name_position); 
$pdf->SetX(45); 
$pdf->Cell(20,6,'NAME',1,0,'L',1); 
$pdf->SetX(65); 
$pdf->Cell(100,6,'TRANSACTION ID',1,0,'L',1); 
$pdf->SetX(135); 
$pdf->Cell(30,6,'AMOUNT',1,0,'R',1); 
$pdf->Ln(); 

//Now show the 3 columns 
$pdf->SetFont('Arial','',12); 
$pdf->SetY($Y_Table_Position); 
$pdf->SetX(45); 
$pdf->MultiCell(20,6,$column_name,1); 
$pdf->SetY($Y_Table_Position); 
$pdf->SetX(65); 
$pdf->MultiCell(100,6,$column_trans_id,1); 
$pdf->SetY($Y_Table_Position); 
$pdf->SetX(135); 
$pdf->MultiCell(30,6,$columna_amount,1,'R'); 
$pdf->SetX(135); 
$pdf->MultiCell(30,6,'$ '.$total,1,'R'); 

//Create lines (boxes) for each ROW (Product) 
//If you don't use the following code, you don't create the lines separating each row 
$i = 0; 
$pdf->SetY($Y_Table_Position); 
while ($i < $number_of_products) 
{ 
    $pdf->SetX(45); 
    $pdf->MultiCell(120,6,'',1); 
    $i = $i +1; 
} 
ob_end_clean(); 
$pdf->Output(); 
ob_end_flush(); 
?> 

    enter code here 

Answer 1

Posting als Community-Wiki, wie es in Kommentaren von mir selbst gelöst wurde und ich habe nichts davon zu gewinnen.

Sie haben die Abfrage nie ausgeführt.

hier:

$result= mysqli_query($conn, "SELECT name, trans_id, amount FROM bustomer"); 

und auf Fehler überprüfen.