Copy CodeThe code is as follows:
Session_Start ();
Header ("Content-type:image/gif");
Class Securitycode
{
Private $codes = ';
function __construct ()
{
$code = ' 0-1-2-3-4-5-6-7-8-9-a-b-c-d-e-f-g-h-i-j-k-l-m-n-o-p-q-r-s-t-u-v-w-x-y-z ';
$codeArray = Explode ('-', $code);
Shuffle ($codeArray);
$this->codes = Implode (", Array_slice ($codeArray, 0,4));
}
Public Function createimg ()
{
$_session[' check_pic ' = $this->codes;
$img = Imagecreate (70,25);
Imagecolorallocate ($img, 222,222,222);
$testcolor 1 = imagecolorallocate ($img, 255,0,0);
$testcolor 2 = imagecolorallocate ($img, 51,51,51);
$testcolor 3 = imagecolorallocate ($img, 0,0,255);
$testcolor 4 = imagecolorallocate ($img, 255,0,255);
for ($i = 0; $i < 4; $i + +)
{
Imagestring ($img, Rand (5,6), 8 + $i * 15,rand (2,8), $this->codes[$i],rand (1,4));
}
Imagegif ($IMG);
}
}
$code = new Securitycode ();
$code->createimg ();
$code = NULL;
?>
After encapsulation into a class, the constructor is added, which makes it easier to use. You can also continue to refine the verification code class, such as adding destructors, how to save memory and so on.
http://www.bkjia.com/PHPjc/323972.html www.bkjia.com true http://www.bkjia.com/PHPjc/323972.html techarticle Copy the code code as follows: PHP session_start (); Header ("Content-type:image/gif"); Class Securitycode {Private $codes = '; function __construct () {$code = ' 0-1-2-3-4-5-6-7-8-9-...
