通过文字传递创建的图形按钮

核心提示：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 (izzyso

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
　　?>