cf brother gift package verification code A PHP verification code class code sharing has been packaged into a class

The code is as follows:

<?php
session_start（）；
Header（"Content-type: image/gif"）；
class SecurityCode
{
private $codes = &#39;&#39;;
function __construct（）
{
$code = &#39;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&#39;;
$codeArray = explode（&#39;-&#39;,$code）；
shuffle（$codeArray）；
$this->codes = implode（&#39;&#39;,array_slice（$codeArray,0,4））；
}
public function CreateImg（）
{
$_SESSION[&#39;check_pic&#39;] = $this->codes;
$img = imagecreate（70,25）；
imagecolorallocate（$img,222,222,222）；
$testcolor1 = imagecolorallocate（$img,255,0,0）；
$testcolor2 = imagecolorallocate（$img,51,51,51）；
$testcolor3 = imagecolorallocate（$img,0,0,255）；
$testcolor4 = imagecolorallocate（$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 encapsulating it into a class, a constructor is added, which makes it easier to use. You can also continue to improve this verification code class, such as adding a destructor, how to save memory, etc.

The above introduces the cf brother gift package verification code. A PHP verification code code sharing has been packaged into a class, including the content of the cf brother gift package verification code. I hope it will be helpful to friends who are interested in PHP tutorials.