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+---- Thread: FPDF error: Some data has already been output, can't send PDF (/Thread-FPDF-error-Some-data-has-already-been-output-can-39-t-send-PDF)
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FPDF error: Some data has already been output, can't send PDF - shackle783 - 07-24-2023
I am using the [fpdf][1] library for my project, and I'm using this to extend one of the drupal module. These lines
$pdf = new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial','B',16);
$pdf->Cell(40,10,'Hello World!');
$pdf->Output();
give me an error: ***FPDF error: Some data has already been output, can't send PDF***
I tried creating this in a separate file outside the drupal area name test.php and when viewed it worked. Anyone here know why this don't work? Or anyone here can point me a right pdf library which I can use in drupal to view HTML to PDF format.
[1]:
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RE: FPDF error: Some data has already been output, can't send PDF - batik216 - 07-24-2023
For fpdf to work properly, there cannot be _any_ output at all beside what fpdf generates. For example, this will work:
<?php
$pdf = new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial','B',16);
$pdf->Cell(40,10,'Hello World!');
$pdf->Output();
?>
While this will not (note the leading space before the opening `<?` tag)
<?php
$pdf = new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial','B',16);
$pdf->Cell(40,10,'Hello World!');
$pdf->Output();
?>
Also, this will not work either (the `echo` will break it):
<?php
echo "About to create pdf";
$pdf = new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial','B',16);
$pdf->Cell(40,10,'Hello World!');
$pdf->Output();
?>
I'm not sure about the drupal side of things, but I know that absolutely zero non-fpdf output is a requirement for fpdf to work.
RE: FPDF error: Some data has already been output, can't send PDF - charleyxig - 07-24-2023
Hi do you have a session header on the top of your page.
or any includes
If you have then try to add this codes on top pf your page it should works fine.
<?
while (ob_get_level())
ob_end_clean();
header("Content-Encoding: None", true);
?>
cheers :-)
RE: FPDF error: Some data has already been output, can't send PDF - hutchins315 - 07-24-2023
The FPDF Error Message will point you to the PHP Line that is sending some content.
If you get no hint what File & Line send some content you probably have an encoding mismatch in your include / require Files.
For me
- `fpdf.php` was ANSI-encoded,
- my `pdf-generator.php` was UTF-8-encoded and
- my database-connect-inlude was UTF-8-encoded *(this UTF-8-encoding did raise the FPDF error. I had to switch it back to ANSI)*
RE: FPDF error: Some data has already been output, can't send PDF - sejm863 - 07-24-2023
Try to save the file without the option: "BOM comment", i.e. in Adobe Dreamweaver, you Save File As..., **uncheck** the box below the filename that says, "*Include Unicode signature(BOM)*".
On Notepad++ you should select the menu: **Encoding**, "*Encode in UTF-8 without BOM*".
And make it default for other files you create, it will spare you a lot of headaches in future.
RE: FPDF error: Some data has already been output, can't send PDF - photoinductive718934 - 07-24-2023
give me an error as below:
`FPDF error: Some data has already been output, can't send PDF`
to over come this error:
go to `fpdf.php` in that,goto line number 996
function Output($name='', $dest='')
after that make changes like this:
function Output($name='', $dest='') {
ob_clean(); //Output PDF to so
RE: FPDF error: Some data has already been output, can't send PDF - lawmaker228 - 07-24-2023
In my case i had set:
ini_set('display_errors', 'on');
error_reporting(E_ALL | E_STRICT);
When i made the request to generate the report, some warnings were displayed in the browser (like the usage of deprecated functions).
Turning `off` the `display_errors` option, the report was generated successfully.
RE: FPDF error: Some data has already been output, can't send PDF - fine360955 - 07-24-2023
You need to call the library
> require ('fpdf.php');
<?php
require('fpdf.php');
$pdf = new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial','B',16);
$pdf->Cell(40,10,'¡Hola, Mundo!');
$pdf->Output();
?>
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RE: FPDF error: Some data has already been output, can't send PDF - sozine320819 - 07-24-2023
add `ob_start ();` at the top and at the end add `ob_end_flush();`
<?php
ob_start();
require('fpdf.php');
$pdf = new FPDF();
$pdf->AddPage();
$pdf->SetFont('Arial','B',16);
$pdf->Cell(40,10,'Hello World!');
$pdf->Output();
ob_end_flush();
?>
RE: FPDF error: Some data has already been output, can't send PDF - Drmecham0 - 07-24-2023
First step
check the permissions on the folders
second step
put this
ob_start();
before the line
$pdf->Output();