<?php  Header( "Content-type: image/gif");  // info for the browser
 
/* PHP3 Button generator, (c) 2000 by IzzySoft (izzysoft@buntspecht.de)
 * License: GPL (and it would be nice to drop me a note that you find it
 * useful - if you use it. And, of course, I am very interested in
 * enhancements you made to the script!
 *
 * Purpose: generate buttons with text passed by parameter.
 *
 * possible parameters to the script:
 *   button    - input gif image. Just the part of the filename before the dot.
 *               The specified image file is expected in the same directory
 *               as this script resides in.
 *   font      - font to use (1 - 5; 1 is very small, 3 medium, 5 normal size.
 *               The script will automatically use a smaller font if text is
 *               too long for selected size.) Default: 5
 *   text      - the text to be put on the button. Will be centered.
 *   textcolor - color for the letters. Default: white.
 *               in this example code only blue, white and black are defined;
 *               but you can add custom colors easily.
 *   width,heigth - width and heigth of the button. Useful only if target
 *               button should have different size than source image.
 *
 * Example for usage:
 *  <IMG SRC="button.php3?button=yellow&text=Example">
 *  will look for yellow.gif and put the string "Example" on it.
 *
 * I use to have three buttons I normally generate (one displays selected
 * item, one is for mouseover(), and one is the default button). The source
 * images are yellow.gif, white.gif and blue.gif - so my script assumes
 * blue.gif as default if "button=" not specified - you may wish to change
 * this below, it's easy ;)
 */
 
 // ===========================[ check for parameters and/or set defaults ]===
 
 if (($font == "") || ($font > 5) || ($font < 1)) { $font = 5; }
 if ($text == "") { $text="Moin!"; }   // button text
 if ($textcolor == "") {               // color for the letters
   switch ($button) {
     case "yellow":
     case "white":
       $textcolor = "black";
       break;
     default:
       if ($button == "") { $button = "blue"; }
       $textcolor = "white";
       break;
   }
 } // textcolor end
 
 $im_info = getimagesize("$button.gif"); // button size
 if ($width == "") {
   if ($im_info == "") {
     $buttonwidth = 125;
   } else {
     $buttonwidth = "$im_info[0]";
   }
 } else {
  $buttonwidth = $width;
 }
 if ($heigth == "") {
   if ($im_info == "") {
     $buttonheigth = 30;
   } else {
     $buttonheigth = "$im_info[1]";
   }
 } else {
  $buttonheigth = $heigth;
 }
 $vmidth = ceil($buttonheigth / 2);
 
 // ========================================[ now lets define some colors ]===
 
 $white = "255,255,255";
 $black = "0,0,0";
 $blue  = "0x2c,0c6d,0xaf";
 
 // ==================================================[ build color array ]===
 // now we put the needed color into an array (if e.g. "$textcolor=white",
 // the array $textcolor_array represents "white")
 $textcolor_array = explode(",", $$textcolor);
 
 // =======================[ calculate position of the text on the button ]===
 
 do {
   $textwidth = strlen($text) * imagefontwidth($font);
   $x = ($buttonwidth - $textwidth) / 2; $x = ceil($x);
   $y = $vmidth - (imagefontheight($font) / 2);
   $font--;
 } while (($x < 0) && ($font > 0)); $font++;
 
 // ===========================================[ now we create the button ]===
 
 if (isset($width) || isset($heigth)) {            // size change expected?
   $ima = imagecreatefromgif("$button.gif");       // open input gif
   $im  = imagecreate($buttonwidth,$buttonheigth); // create img in desired size
   $uglybg = ImageColorAllocate($im,0xf4,0xb2,0xe5);
   ImageRectangle($im,0,0,$buttonwidth,$buttonheigth,$uglybg);
   $dummy = imagecopyresized($im,$ima,0,0,0,0,$buttonwidth,$buttonheigth,$im_info[0],$im_info[1]);
   if ($dummy == "") {
     ImageDestroy($im);  // if it didn't work, create default below instead
   } else {;}
   ImageDestroy($ima);
   ImageColorTransparent($im,$uglybg);
 } else {
   $im = imagecreatefromgif("$button.gif");        // open input gif
 }
 if ($im == "") {  $im = imagecreate($buttonwidth,$buttonheigth); // if input gif not found,
  $rblue = ImageColorAllocate($im, 0x2c,0x6D,0xAF);// create a default box
  ImageRectangle($im,0,0,200,100,$rblue);
 }
 $color = ImageColorAllocate($im, $textcolor_array[0], $textcolor_array[1], $textcolor_array[2]); // allocate the color
 imagestring($im, $font, $x, $y, "$text", $color); // put the text on it
 ImageGif($im);                                    // send button to browser
 ImageDestroy($im);                                // free the used memory
?>