Windows + iis + php architecture websites do not display verification codes. how can this problem be solved?

The Windows + iis + php architecture website does not display the verification code http://www.xmfoodcn.com/system/login.php   do not display the verification code &lt ;? Phprequire_once & nbsp; '../global. php'; the Windows + iis + php architecture website does not display the verification code.
Http://www.xmfoodcn.com/system/login.php

The verification code is not displayed.

Require_once '../global. php ';

Function king_ajax_salt (){
Global $ king;
$ Id_fly = kc_post ('id ');
$ Id = substr ($ id_fly, 0, strlen ($ id_fly)-4 );
$ Salt = kc_random (12 );
$ Js = "\ $ ('# {$ id} _ salt'). val ('{$ salt }');";
$ S = "lang-> get ('System/check/verifynew '). "\" src = \"". $ king-> config ('inst '). "system/verify. php? Salt = {$ salt} \ "/> ";
$ S. = "". $ king-> lang-> get ('System/check/verifynew ')."";
Kc_ajax ('', $ s, 0, $ js );
}

Function king_def (){

Global $ king;
Header ("Cache-Control: no-cache, must-revalidate"); // HTTP/1.1
Header ("Expires: Mon, 26 Jul 1997 05:00:00 GMT"); // past time

Header ("Content-type: image/png ");

$ Salt = kc_get ('Salt', 1, 1 );

$ Width = $ king-> config ('verifywidth'); // The Image length.
$ Height = $ king-> config ('verifyheight'); // The Image height.
$ Size = $ king-> config ('verifysize'); // text size
$ Num = $ king-> config ('verifynum'); // number of texts
$ Content = $ king-> config ('verifycontent'); // random character

$ Array_content = explode ('|', $ content );
$ Array_content = array_diff ($ array_content, array (null ));
$ Array_font = kc_f_getdir ('System/verify_font ', 'ttf | ttc ');

$ Str = '';

$ Img = imageCreate ($ width, $ height); // create a blank image
ImageFilledRectangle ($ img, 0, 0, $ width, $ height, imagecolorallocate ($ img, 255,255,255 ));

// Write
For ($ I = 0; $ I <$ num; $ I ++ ){
$ Code = $ array_content [array_rand ($ array_content)];
$ Str. = $ code; // verification code character
$ Color = imageColorAllocate ($ img, rand (0,128), rand (0,128), rand (0,128 ));
$ Font = 'verify _ font/'. $ array_font [array_rand ($ array_font)]; // randomly read a font
$ Left = rand (round ($ size * 0.2), round ($ size * 0.4) + $ I * $ size;
Imagettftext ($ img, rand (round ($ size * 0.7), $ size), rand (-20, 20), $ left, rand (round ($ size * 1.2 ), $ size * 1.4), $ color, $ font, $ code );
}
// Draw an asterisk
$ Max = $ width * $ height/400;
For ($ I = 0; $ I <$ max; $ I ++ ){
Imagestring ($ img, 15, rand (0, $ width), rand (0, $ height), '*', rand (192,250 ));
}
// Draw Point
$ Max = $ width * $ height/40;
For ($ I = 0; $ I <$ max; $ I ++ ){
ImageSetPixel ($ img, rand (0, $ width), rand (0, $ height), rand (1,200 ));
}
// Draw a line
$ Max = $ width * $ height/800;
For ($ I = 0; $ I <$ max; $ I ++ ){
Imageline ($ img, rand (0, $ width), rand (0, $ height), rand (0, $ width), rand (0, $ height ), rand (0,255 ));
}
// Write the verification code to verify
$ Verify = new KC_Verify_class;
$ Verify-> Put ($ salt, $ str );

ImagePng ($ img );
ImageDestroy ($ img );

$ Verify-> Clear ();
}
?> PHP verification code
------ Solution --------------------

$s = file_get_contents('http://www.xmfoodcn.com/system/verify.php?salt=pkommyjkafe7');
echo substr($s, 3);