GD Picture

NZ_Kiwis

I've created a new picture using GD functions, however when I save this image it's blank or when I copy and paste it into into a email it's a small blank box - what is wrong?

johanafm

You most likely made a misstake in your code.

NZ_Kiwis

My form links to this page, it displays the picture okay i'm my screen I just can not save it or copy and paste it.

Do I need to post my form to a page which calls <img src="myphpscript.php">

<?php
$image = ImageCreateFromjpeg("merge.jpg");

$color = imagecolorallocate($image, 0, 0, 255);
$colorShadow = imagecolorallocate($image, 0, 0, 255);
$font = 'AnnabelScript.ttf';
$fontSize = "24";
$fontRotation = "0";


$Message = $_POST[Message];
ImageTTFText($image, $fontSize, $fontRotation, 130, 90, $color, $font, $too);


header("Content-Type: image/JPEG");

imagejpeg($image);
imagedestroy($image);
?>

NZ_Kiwis

anyone?

johanafm

If you don't want the browser to get an image, but rather an html document containing the image you could do one of the following
1. Use the data uri scheme and base64 encode your image data
2. Save the image to a file with imagejpeg($image, 'filename'), somehow keep track of the filename (session variable perhaps) and use an ordinary uri for your image src
3. Use your above script as the target for your image src attribute but change from $POST to $GET in it, while the the form post results in this

$msg = isset($_POST['Message']) ? urlencode($_POST['Message']) : '';
echo '<img src="http://example.com/imageScript.php?text='.$msg.'" alt="" />';

Apart from that, you most likely have two errors in your code.

$Message = $_POST[Message];

Should produce a warning, something along the lines of: Use of undeclared constant Message, assumed 'Message'. In other words, quote your array key.

You assign the posted message to $Message but never use it. Perhaps $too should be $Message?

NZ_Kiwis

Thanks I can now copy and paste my picture - I get the merge.jpg just no text now

Here is my latest code.

<?php

$image = ImageCreateFromjpeg("merge.jpg");

$color = imagecolorallocate($image, 0, 0, 255);
$colorShadow = imagecolorallocate($image, 0, 0, 255);
$font = 'AnnabelScript.ttf';
$fontSize = "24";
$fontRotation = "0";

if(isset($_POST['Message'])){
$Message= $_POST['Message'];
ImageTTFText($image, $fontSize, $fontRotation, 130, 90, $color, $font, $Message);
}



header("Content-Type: image/JPEG");

imagejpeg ($image, NULL, 98);
imagedestroy($image);
?>

johanafm

There are different possibilities. Your image could be so small that the $x and $y coordinate arguments put the text outside the image. Use 0, 24 to have the whole text as close to the top left corner as possible.
Perhaps AnnabelScript.ttf does not exist. Or perhaps you need to specify the path to it. However, this should be apparent from checking the error log. You do log warnings, right?

Other than that it should be working as far as I can see, but I wouldn't initialize variables as strings when they are used as floats, i.e.

$size = 24.0;
$angle = 0.0;

# or even
$size = 24;
$angle = 0;