Dynamic Font Generation

<?
// SETTINGS
$fontbase = $DOCUMENT_ROOT."/howto/php/dynafont/";
$rotateDegrees = 0;
$text = trim(stripslashes($_GET["text"]));
// SET FONT PROPERTIES
$font = $_GET["font"];
if (!$font) { $font = "arial.ttf"; }
$fontfile = $fontbase.$font;
$size = $_GET["size"];
if (!$size) { $size = 5; }
$textalign = $_GET["textalign"];
if (!$textalign) { $textalign = "left"; }
$color = $_GET["color"];
if (!$color) { $color = "000000"; }
//$foreground = GetRGBvalues("0x".$color, false);
$bgcolor = $_GET["bgcolor"];
if (!$bgcolor) { $bgcolor = "FFFFFF"; }
//$background = GetRGBvalues("0x".$bgcolor, false);
if($_GET["date"]) {
 $text = date($_GET["date"]);
}
$ImageSizeInfoArr = GetImageSizeForTextBlock($rotateDegrees, $text, $fontfile, $size);
// CREATE IMAGE
$im = imagecreate ($ImageSizeInfoArr["WIDTH"]+5, $ImageSizeInfoArr["HEIGHT"]);
$background = ImageColorAllocate ($im, hexdec(substr($bgcolor, 0, 2)), hexdec(substr($bgcolor, 2, 2)), hexdec(substr($bgcolor, 4, 2)));
$foreground = ImageColorAllocate ($im, hexdec(substr($color, 0, 2)), hexdec(substr($color, 2, 2)), hexdec(substr($color, 4, 2)));
ImageTTFText ($im, $size, 0, $ImageSizeInfoArr["X_POS"], $ImageSizeInfoArr["Y_POS"], $foreground, $fontfile, $text);
// SEND IMAGE TO BROWSER
Header ("Content-type: image/PNG");
ImagePNG ($im, "", 100);
ImageDestroy ($im);
?>
<?
// IMAGE SUPPORT FUNCTIONS
function GetImageSizeForTextBlock($rotateDegrees, $text, $fontLocation, $fontSize){
 ##-- This will add a small margin area around the text block.  --##
 ##-- The margin grows with the font size.   --##
 $margin = intval(0.25 * $fontSize);
 ##-- Convert the angle so it is always a number between 0 and 359 --##
 if($rotateDegrees > 359 || $rotateDegrees < -359){
  $rotateDegrees = intval($rotateDegrees % 360);
 }
 if($rotateDegrees < 0){
  $rotateDegrees = 360 + $rotateDegrees;
 }
 #-- Clean out all of the "new line" characters. --#
 #-- The following function expects the special code of "-br-" for line breaks. --#
 $text = preg_replace("/(\n|\r)/", "", $text);
 ##-- Get the total size of the text block so that we know how big to create the Image --##
 $TextBoxSize = ImageTTFBBox ($fontSize, $rotateDegrees, $fontLocation, preg_replace("/-br-/", "\n\r", $text));
 ##-- Put the variables into reader-friendly variables --##
 $TxtBx_Lwr_L_x = $TextBoxSize[0];
 $TxtBx_Lwr_L_y = $TextBoxSize[1];
 $TxtBx_Lwr_R_x = $TextBoxSize[2];
 $TxtBx_Lwr_R_y = $TextBoxSize[3];
 $TxtBx_Upr_R_x = $TextBoxSize[4];
 $TxtBx_Upr_R_y = $TextBoxSize[5];
 $TxtBx_Upr_L_x = $TextBoxSize[6];
 $TxtBx_Upr_L_y = $TextBoxSize[7];
 ##-- The Text Box coordinates are relative to the font, regardless of the angle   --##
 ##-- We need to figure out the height and width of the text box accounting for the rotation  --##
 if($rotateDegrees <= 90 || $rotateDegrees >= 270 ){
  $TextBox_width = max($TxtBx_Lwr_R_x, $TxtBx_Upr_R_x) - min($TxtBx_Lwr_L_x, $TxtBx_Upr_L_x);
  $TextBox_height = max($TxtBx_Lwr_L_y, $TxtBx_Lwr_R_y) - min($TxtBx_Upr_R_y, $TxtBx_Upr_L_y);
  ##-- This figures out where the coordinates of the first letter in the text block starts --##
  ##-- It is roughly the lower left-hand corner letter      --##
  $Start_Text_Coord_x = -(min($TxtBx_Upr_L_x, $TxtBx_Lwr_L_x));
  $Start_Text_Coord_y = -(min($TxtBx_Upr_R_y, $TxtBx_Upr_L_y));
 }
 else{
  $TextBox_width = max($TxtBx_Lwr_L_x, $TxtBx_Upr_L_x) - min($TxtBx_Lwr_R_x, $TxtBx_Upr_R_x);
  $TextBox_height = max($TxtBx_Upr_R_y, $TxtBx_Upr_L_y) - min($TxtBx_Lwr_L_y, $TxtBx_Lwr_R_y);
  $Start_Text_Coord_x = -(min($TxtBx_Lwr_R_x,$TxtBx_Upr_R_x));
  $Start_Text_Coord_y = -(min($TxtBx_Lwr_L_y, $TxtBx_Lwr_R_y));
 }
 ##-- We need to add our margin to the coordinates of the first letter --##
 $Start_Text_Coord_x += $margin;
 $Start_Text_Coord_y += $margin - 2; //Don't forget to account for the '0th' pixel at Y-coord 0
 ##-- We are going to make the image just big enough to hold our text block... accounting for the rotation and font size. --##
 ##-- We times the Margin by 2 so that there is a margin on all 4 sides  --##
 $TotalImageWidth = $TextBox_width + $margin *2;
 $TotalImageHeight = $TextBox_height + $margin *2;
 ##-- Send back a hash with our calculations --#
 return array("WIDTH"=>$TotalImageWidth, "HEIGHT"=>$TotalImageHeight, "X_POS"=>$Start_Text_Coord_x, "Y_POS"=>$Start_Text_Coord_y);
}
?>
Download source and components at:
http://prdownloads.sourceforge.net/cedit/cEditSource.zip?download