Three PHP Chinese characters English Verification code generation program

Three kinds of PHP tutorials Chinese characters English verification code generation program

$ChineseChar = Explode (', ', "People, out, come, friends, learn, filial piety, benevolence, righteousness, propriety, low, loyal, country, medium, easy, white, man, Fire, king, Gold, wood, thunder, Wind, dragon, Tiger, Day, Earth, life, halo, Vegetable, bird, field, three, hundred, money, blessing, love, feeling, beast, worm, fish, Nine, net, new, degree, eh, alas, Ah, oh, Miriam, old, Little, day, month, star, Ken, each, Cheng ");


$k [0]= $ChineseChar [Array_rand ($ChineseChar)];


$k [1]= $ChineseChar [Array_rand ($ChineseChar)];


$k [2]= $ChineseChar [Array_rand ($ChineseChar)];


$k [3]= $ChineseChar [Array_rand ($ChineseChar)];


$cookie _str=implode (", $k);


Setcookie (' vrify ', MD5 ($cookie _str), Time () +600);


$str [0]=iconv (' gb2312 ', ' UTF-8 ', $k [0]);


$str [1]=iconv (' gb2312 ', ' UTF-8 ', $k [1]);


$str [2]=iconv (' gb2312 ', ' UTF-8 ', $k [2]);


$str [3]=iconv (' gb2312 ', ' UTF-8 ', $k [3]);


//Constructed image


$x _size=100;


$y _size=25;


$font = ' Simhei.ttf ';


$pic =imagecreate ($x _size, $y _size);


$background _color = imagecolorallocate ($pic, 255, 255, 255);


$FOREGROUNDARR = Array (imagecolorallocate ($pic, rand (0), rand (0,), rand (0, 20)),


imagecolorallocate ($pic, rand (0), rand (0, ten), rand (245, 255)),


imagecolorallocate ($pic, rand (245, 255), rand (0), rand (0, 10)),


Imagecolorallocate ($pic, rand (245, 255), rand (0), rand (245, 255));


Imagettftext ($pic, Mt_rand (12,15), Mt_rand ( -8,8), 6,mt_rand (19,22), $foregroundArr [Rand (0,3)], $font, $str [0]);


Imagettftext ($pic, Mt_rand (15,17), Mt_rand ( -8,8), 26,20, $foregroundArr [rand (0,3)], $font, $str [1]);


Imagettftext ($pic, Mt_rand (12,15), Mt_rand ( -8,8), 46,20, $foregroundArr [rand (0,3)], $font, $str [2]);


Imagettftext ($pic, Mt_rand (15,17), Mt_rand ( -8,8), 66,mt_rand (19,22), $foregroundArr [Rand (0,3)], $font, $str [3]);


for ($i =0 $i <80; $i + +)


       {


$pointcol = Imagecolorallocate ($pic, Rand (0,255), Rand (0,255), Rand (0,255));


Imagesetpixel ($pic, rand (2, $x _size-2), rand (2, $y _size-2), $pointcol);


       }


$border = Imagecolorallocate ($pic, 133, 153, 193);


Imagerectangle ($pic, 0, 0, $x _size-1, $y _size-1, $border);


imagepng ($pic);


Imagedestroy ($pic);


?>


<?php


session_start ();


session_set_cookie_params (0, '/');


$ENABLEGD = 1;


$funcs = Array (' Imagecreatetruecolor ', ' imagecolorallocate ', ' Imagefill ', ' imageline ', ' Imagedestroy ', ' Imagecolorallocatealpha ', ' imageellips tutorial e ', ' imagepng ');


foreach ($funcs as $func)


{


if (!function_exists ($func))


       {


$ENABLEGD = 0;


break;


       }


}


if (!function_exists (' Ob_gzhandler ')) Ob_clean ();

if ($ENABLEGD)
{
      //create captcha
        $consts = ' cdfgkmnpqrstwxyz23456 ';
       $vowels = ' aek23456789 ';
       for ($x = 0; $x < 6; $x + +)
       {
              $const [$x] = substr ($consts, Mt_ Rand (0,strlen ($consts)-1), 1);
              $vow [$x] = substr ($vowels, Mt_ Rand (0,strlen ($vowels)-1), 1);
      }
       $radomstring = $const [0]. $vow [0]. $const [2]. $const [1]. $vow [1]. $const [3]. $ VOW[3]. $const [4];
       $_session[' checkcode ' = $string = substr ($radomstring, 0,4);//only Display 4 STR
      //set up image, the FirsT number is the width and the second is the height
       $imageX = strlen ($radomstring) *8 ;      //the image Width
       $imageY = 20;                                            //the Image Height