> -----Original Message-----
> From: Daevid Vincent [mailto:[email protected]]
> Sent: Monday, December 06, 2010 4:02 PM
> To: [email protected]
> Subject: [PHP] How can I call GD's imagepng() directly from my class?
>
> I have a class that does some massive computations to compute a LOPA
> (layout of passenger aircraft).
>
> I currently render it in an HTML table with little seats. I
> want to now
> make this using GD so I can show entire fleets of aircraft on
> one page.
>
> Inside my LOPA.class.php I have this method:
>
> public function render_image()
> {
> $my_img = imagecreate( 200, 80 );
> $background = imagecolorallocate( $my_img, 0, 0, 255 );
> $text_colour = imagecolorallocate( $my_img,
> 255, 255, 0 );
> $line_colour = imagecolorallocate( $my_img,
> 128, 255, 0 );
> imagestring( $my_img, 4, 30, 25, "Test Image",
> $text_colour
> );
> imagesetthickness ( $my_img, 5 );
> imageline( $my_img, 30, 45, 165, 45, $line_colour );
>
> header( "Content-type: image/png" );
> header('Content-Length: ' . strlen($my_img));
> imagepng( $my_img );
>
> imagecolordeallocate( $line_color );
> imagecolordeallocate( $text_color );
> imagecolordeallocate( $background );
> imagedestroy( $my_img );
> }
>
>
> And I'm trying to call it from a PHP page like so:
>
> <img src="<?php $my_lopa->render_image(); ?>" alt="Image
> created by a PHP
> script" width="200" height="80">
>
> But it doesn't show the picture. :\
>
> If I take the contents of that function and dump it into a
> "gdtest.php"
> file and call it like this however, it does work:
>
> <img src="images/gdtest.php" alt="Image created by a PHP script"
> width="200" height="80">
>
> So what am I doing wrong above that I can't just call it from
> my class?
>
I got a little 'hack' further, but not loving it. Maybe I'll move the image
to a $_SESSION variable and then have the "gdtest.php" pull it and echo it
that way....
public function render_image()
{
$my_img = imagecreate( 200, 80 );
$background = imagecolorallocate( $my_img, 0, 0, 255 );
$text_colour = imagecolorallocate( $my_img, 255, 255, 0 );
$line_colour = imagecolorallocate( $my_img, 128, 255, 0 );
imagestring( $my_img, 4, 30, 25, "Test Image", $text_colour
);
imagesetthickness ( $my_img, 5 );
imageline( $my_img, 30, 45, 165, 45, $line_colour );
ob_start();
header( "Content-type: image/png" );
header('Content-Length: ' . strlen($my_img));
imagepng( $my_img );
$final_image_data = ob_get_contents();
ob_end_clean();
imagecolordeallocate( $line_color );
imagecolordeallocate( $text_color );
imagecolordeallocate( $background );
imagedestroy( $my_img );
echo
'data:image/png;base64,'.base64_encode($final_image_data);
}
<img src="<?php $my_lopa->render_image(); ?>" width="200" height="80">
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