FPDF Text Stroke - php

Question

I'm trying to write some text with stroke in a PDF file using the FPDF PHP class.
I noticed a strange black text border and I don't know how to make it disappear.
I'll show you a simplified code of what i'm doing and the result so you can understand my problem:
require('fpdf/fpdf.php');
$pdf = new FPDF('P','pt',array(250,300));
$pdf->AddPage();
$letter = imagecreatetruecolor(250,300);
imagealphablending($letter, 1);
imagesavealpha($letter, 1);
imagefill($letter, 0, 0, imagecolorallocatealpha($letter, 0, 0, 0, 127));
$border = imagecreatetruecolor(250,300);
imagealphablending($border, 1);
imagesavealpha($border, 1);
imagefill($border, 0, 0, imagecolorallocatealpha($border, 0, 0, 0, 127));
$letter_color = imagecolorallocate($letter, 0, 0, 255);
$border_color = imagecolorallocate($letter, 255, 0, 0);
imagettftext($letter, 350, 0, 25, 250, $letter_color, 'font/times.ttf', 'a');
imagettftext($border, 350, 0, 25, 250, $border_color, 'font/times.ttf', 'a');
imagepng($letter,'letter.png');
imagepng($border,'border.png');
imagedestroy($letter);
imagedestroy($border);
for($j = 0; $j < 10; $j++) {
for($k = 0; $k < 10; $k++) {
$pdf->Image('border.png', $k - 5, $j - 5, 250, 300);
}
}
$pdf->Image('letter.png', 0, 0, 250, 300);
unlink('letter.png');
unlink('border.png');
$pdf->Output();
This is the result: http://postimg.org/image/l97rr0xzr/
How can I solve this?

Answer 1

A little bit late:
I used a function http://www.fpdf.org/en/script/script78.php# in a custom class:
class CustomPdf extends Fpdf
{
public function ClippingText($x, $y, $txt, $outline=false)
{
$op= $outline ? 5 : 7;
$this->_out(sprintf('q BT %.2F %.2F Td %d Tr (%s) Tj ET',
$x*$this->k,
($this->h-$y)*$this->k,
$op,
$this->_escape($txt)));
}
public function strokeText($x, $y, $txt, $outline=true)
{
$this->SetTextColor(46, 52, 120);
$this->Text($x,$y,$txt);
$this->SetDrawColor(186, 236, 253);
$this->SetLineWidth(0.5);
$this->ClippingText($x,$y,$txt,$outline);
}
}
$pdf = new CustomPdf();
.... add pages and fonts and cells
$pdf->strokeText(30,30,'Hola mundo');
results in

Answer 2

The problem is in the imagettftext(), but if I use that function to print letters of the same color in a single image the shadow appears only on the border of the "composition letters". Now I temporary moved the for loop to do what I just explained.
This is the simplified code:
require('fpdf/fpdf.php');
$pdf = new FPDF('P','pt',array(250,300));
$pdf->AddPage();
$letter = imagecreatetruecolor(250,300);
imagealphablending($letter, 1);
imagesavealpha($letter, 1);
imagefill($letter, 0, 0, imagecolorallocatealpha($letter, 0, 0, 0, 127));
$letter_color = imagecolorallocate($letter, 0, 0, 255);
$border_color = imagecolorallocate($letter, 255, 0, 0);
for($j = -5; $j <= 5; $j++) {
for($k = -5; $k <= 5; $k++) {
imagettftext($letter, 350, 0, 25 + $j, 250 + $k, $border_color, 'font/times.ttf', 'a');
}
}
imagettftext($letter, 350, 0, 25, 250, $letter_color, 'font/times.ttf', 'a');
imagepng($letter,'letter.png');
imagedestroy($letter);
$pdf->Image('letter.png', 0, 0, 250, 300);
unlink('letter.png');
$pdf->Output();
This is the result: http://postimg.org/image/s44v2rbqn/
Still looking for how to delete the shadow.
Now that i really understood the problem, I noticed that this is a duplicate. Sorry.
If you know the answer go here: How we can change the font opacity and shadowing in imagettftext function?