通过文字传递创建的图形按钮,详细说明请看文内英文说明
<?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 fo
 //  r 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";
 $blue = "0x2c,0c6d,0xaf";
 // =====================================
 //  =============[ build color array ]===
 // now we put the needed color into an a
 //  rray (if e.g. "$textcolor=white",
 // the array $textcolor_array represents
 //  "white")
 $textcolor_array = explode(",", $$textcolor);
 // =======================[ calculate po
 //  sition 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
 ?>