Trying to center text

[MicrotechXP]

I am trying to center text on an image and the problem is the text doesn't center.

Here is the code:

<?php
header("Content-type: image/png");
//$mysql = mysql_connect("localhost","user","pass");
//$db = mysql_select_db("migt");
//$user = mysql_real_escape_string($_GET['uid']);
//$query = "SELECT * FROM migt WHERE uid='" . $user . "'";
//$query = mysql_query($query);
//$query = @mysql_fetch_array($query);
// THIS IS TEMPORARY:
$query['display'] = "tech star";
function hex2string($image, $hex){
	$hex = str_split($hex,"2");
	$hex[0]=hexdec($hex[0]);
	$hex[1]=hexdec($hex[1]);
	$hex[2]=hexdec($hex[2]);
	$color=imagecolorallocate($image, $hex[0], $hex[1], $hex[2]);
	return $color;
}
function write_text($image, $txtsize, $x, $y, $string, $hex, $font){
	$color = hex2string($image, $hex);
	imagettftext($image,$txtsize,0,$x,$y,$color,$font,$string);
}
function addimage($new, $image, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h){
$new = imagecreatefrompng($new);
imagecopy($image,$new,$dst_x,$dst_y,$src_x,$src_y,$src_w,$src_h);
imagedestroy($new);
}
function center($string,$start,$px){
	$ssize = imagettfbbox($px, "0", "calibri.ttf", $string);
	$dsize = $start - $ssize[4];
	$dsize = $dsize / 2;
	return $dsize;
}
$image = imagecreatefrompng("gt1.png");
addimage("apache_pb.png",$image,2,3,1,1,76,71);
write_text($image, 16,center($query['display'], 86, 225, 16),45,$query['display'],"FFFFFF","calibri.ttf");
imagepng($image);
imagedestroy($image);
?>
//
//

Is there any way I can fix this?

[Chris Z]

I don't think that trying the center tag would work in this case. You'll probably have to manually center it by adjusting the x,y positions

[MicrotechXP]

I know it won't work, but I want an automatic function to do it for me.

[Brandon]

I know it won't work, but I want an automatic function to do it for me.

Fine tune that function I made, it'll work just show it who is the boss of PHP.

[Bryon]

I did not test this for errors much other than parser errors, so things may mess up if/when the text's width/height is greater than the width/height of the image itself.

<?php

   header("Content-type: image/png");

   function writeText($image, $fontSize, $textString, $color, $font, $centerText = false, $fontXPos = false, $fontYPos = false) {
      if ($centerText == true) {
         $xyCoords = centerText($image, $fontSize, $font, $textString);
         $fontXPos = $xyCoords['x'];
         $fontYPos = $xyCoords['y'];
      }
      imagettftext($image, $fontSize, 0, $fontXPos, $fontYPos , $color, $font, $textString);
   }

   function centerText($image, $fontSize, $font, $textString) {
      $tmpVals = imagettfbbox($fontSize, 0, $font, $textString);
      $textWidth = abs($tmpVals[4] - $tmpVals[0]);
      $textHeight = abs($tmpVals[5] - $tmpVals[1]);
      $textPos = array();
      $textPos['x'] = (((.5 * imagesx($image))) - ($textWidth / 2));
      $textPos['y'] = (((.5 * imagesy($image))) - ($textHeight / 2));
      return $textPos;
   }

   $image = imagecreatefrompng('image.png');

   $font = '';
   $color = imagecolorallocate($image, 0x00, 0x00, 0x00);
   $textString = 'yo dawg';
   $fontSize = (int) 14;

   writeText($image, $fontSize, $textString, $color, $font, true);

   imagepng($image);
   imagedestroy($image);

?>

Edit: Also, I forgot to mention that this won't do anything with anngglless or rotation with the text.

Edit 2: I didn't really see a need for the invalid x,y coordinate check, so I just removed it.

[mgw854]

OK, I inserted your centering function into the script, and now it complains because it "can't modify headers". Any reasons this might have happened? Even when I comment out your script, it provides the error.

EDIT:
Hmm... I found the problem. SharePoint Designer must encode the files in some certain way that they contain special headers. However, the text is still unoriented. It is actually centered on the image, not on it's own little box.

[Bryon]

I'm not sure what you're asking, mgw. (It's own little box?)

Do you have an example of what you mean?

[Brandon]

The headers could be from it outputing png, but creating gif?

header("Content-type: image/png"); 

$image = imagecreatefrompng('image.png'); 

but then

imagegif($image); 

[Bryon]

Whoops

[mgw854]

No, I caught that png/gif slip-up, so that wasn't the problem. It was, indeed, MS SharePoint. As for the box, here is the example, where the text needs to be in those boxes:
http://i7.photobucket.com/albums/y27...TechXP/gt1.png