Use PHP to generate a dynamic image [from Osso]

Many people do not know that PHP can generate non-HTML data. This is very useful for generating image graphs. It can generate a simple ad horizontal chart from the database or simply generate only one graphic button.
I use TTF in the following example
I usually name it 'Button. php3 ':
######################################## ###############
----- Button. php3 ------
<?
Header ("Content-type: image/gif ");
If (! Isset ($ s) $ s = 11;
$ Size = imagettfbbox ($ s, 0, "fonts/TIMES. TTF", $ text );
$ Dx = abs ($ size [2]-$ size [0]);
$ Dy = abs ($ size [5]-$ size [3]);
$ Xpad = 9;
$ Ypad = 9;
$ Im = imagecreate ($ dx + $ xpad, $ dy + $ ypad );
$ Blue = ImageColorAllocate ($ im, 0x2c, 0x6D, 0xAF );
$ Black = ImageColorAllocate ($ im, 0, 0 );
$ White = ImageColorAllocate ($ im, 255,255,255 );
ImageRectangle ($ im, $ dx + $ xpad-1, $ dy + $ ypad-1, $ black );
ImageRectangle ($ im, 0, 0, $ dx + $ xpad, $ dy + $ ypad, $ white );
ImageTTFText ($ im, $ s, 0, (int) ($ xpad/2) + 1, $ dy + (int) ($ ypad/2), $ black, "fonts/TIMES. TTF ", $ text );
ImageTTFText ($ im, $ s, 0, (int) ($ xpad/2), $ dy + (int) ($ ypad/2)-1, $ white, "fonts/TIMES. TTF ", $ text );
ImageGif ($ im );
ImageDestroy ($ im );
?>
######################################## ###############
It is very important that you cannot put any HTML tags in this file. There cannot be blank lines in the file <? And?> Before or after the tag. If you see an incomplete image after using this Script, it means that you may mistakenly typed characters outside the PHP tag.
The above script can be called in the webpage by syntax:
######################################## ###############