PHP-created button background graphic messed up

Seems like transparency/alpha channel issue, perhaps you need these options set?

http://php.net/manual/en/function.imagealphablending.php

To false,

http://php.net/manual/en/function.imagesavealpha.php

set to true.

Similar question with these values set claimed to have resolved:

http://stackoverflow.com/questions/32243/can-png-image-transparency-be-preserved-when-using-phps-gdlib-imagecopyresampled

Probably helpful to see some of the code you're using if this doesn't help.

Can you post the code ? This seems like the button is duplicating it's middle part (is it divided into left middle and right) ?

Hai,

1) Since it is of PNG file,it will be like this only in different browsers view,for that,use the " pngFix.js " file (just download the file from net)

2) Enough that you include the file where ever you have used the png images,if not working go throw the " pngFix.js " file and make simple modification

3) If you have include the png image on CSS, relating to that,there is also a possibility to include the " js " file functionality into CSS,where the include file will have different format,try this to


hope you have an idea to fix this up

Thanks for all your suggestions, guys. Just going to try them all and will let you know.
Sorry for the delay in response.

Just posting the code producing this, in case some of you guys would like to have a look. It's really just a test for me, so it won't be perfect

$button_text = $_POST['button_text'];
		$colour = $_POST['colour'];
		
		$im = imagecreatefrompng('images/' . $colour . '-button.png');
		
		if (!$im)
		{
			$error = 'Could not create image.';
		}
		
		$width_image = imagesx($im);
		$height_image = imagesy($im);
		
		//echo $width_image . "<br />";
		//echo $height_image . "<br />";
		// the images need 20 a 5 pixel margins from the edge of the image
		// Set up the button measurements without the margins
		$width_image_wo_margins = $width_image - (2 * 20);
		$height_image_wo_margins = $height_image - (2 * 5);
		
		// button height 50pixels - (2*5 margins) = allowed max font size 40
		$font_size = 30;
		putenv('GDFONTPATH=/Library/Fonts');
		$fontname = 'Tahoma';
		
		// test the size of the text by looking at the bounding box [bbox] of the text.
		// loop, decrementing the font size at each iteration, until the submitted text
		// will fit on the button reasonably: 
		do {
			$font_size--;
			// find out the size of the text at that font size
			$bbox = ImageTTFBBox($font_size, 0, $fontname, $button_text);
			
			$right_text = $bbox[2]; // right co-ordinate
			$left_text = $bbox[0]; // left co-ordinate
			$width_text = $right_text - $left_text; // how wide is it?
			$height_text = abs($bbox[7] - $bbox[1]); // how tall is it?
			//echo '$font_size = ' . $font_size . '<br />';
			//echo '$fontname = ' . $fontname . '<br />';
			//echo '$height_text = ' . $height_text . '<br />';
			//print_r($bbox);
			
		}
		while ($font_size>8 &&
			  (	$height_text>$height_image_wo_margins || $width_text>$width_image_wo_margins ));
			  
		if ($height_text>$height_image_wo_margins || $width_text>$width_image_wo_margins) 
		{
			//no readable font size will fit on button
			$error = '<p style="color: red;">Text given will not fit on button.</p>';
		} 
		else 
		{
		
			// all ok, work out the base position for the start of the text
			// this is the midpoint of the available space
			$text_x = $width_image/2.0 - $width_text/2.0;
			$text_y = $height_image/2.0 - $height_text/2.0;
			
			//Add correction factors to account for the baseline relative coordinate system
			// These correction factors allow for the baseline and a little adjustment because
			// the image is a bit "top heavy";
			if($left_text < 0) 
			{
				$text_x += abs($left_text); 		// 	add factor for left overhang
				$above_line_text = abs($bbox[7]); 	//	how far above the baseline
				$text_y += $above_line_text;		// 	add baseline factor
				$text_y -= 2;						//	adjustment factor for shape o our template
			}
			// set up the text colour
			$white = imagecolorallocate($im, 255, 255, 255);
			// draw the text onto the button
			ImageTTFText($im, $font_size, 0, $text_x, $text_y, $white, $fontname, $button_text);
			//display image in browser
			Header ('Content-type: image/png');
			ImagePNG($im);
			imagedestroy($im);

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Thanks a lot for this, Slick, I really had no idea that the tranparency does need some extra considerations and the book I am following did not even touch that. So again, thanks a lot, I'll come with some questions tomorrow if needed :)

thanks a lot for your solution, it was absolutely spot on and worked immediately. I definitely have to look a bit more into GDs documentations rather than just follow books (which did not mention any of the transparency issues) Thanks a lot again!!

Screen-shot-2011-03-05-at-14.50..png