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一個好用的驗證碼PHP工具類

WBOY

發布： 2016-07-25 08:43:42

原創

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/**
* 验证码类
*/
class Base_Tool_Verify{
/**
* 生成验证码方法
*/
public static function createCode(){
//生成验证码图片
// 全数字
$str = "D,B,2,3,4,5,6,7,8,9,A,B,C,D,E,F,G,H,W,J,K,M,M,N,K,P,Q,R,S,T,U,V,W,X,Y,Z"; //要显示的字符，可自己进行增删
$list = explode(",", $str);
$cmax = count($list) - 1;
$verifyCode = '';
for ( $i=0; $i < 4; $i ){
$randnum = mt_rand(0, $cmax);
$verifyCode .= $list[$randnum]; //取出字符，组合成为我们要的验证码字符
}
$_SESSION['code'] = $verifyCode; //将字符放入SESSION中
$im = imagecreate(80,28); //生成图片
$black = imagecolorallocate($im, 0 ,0 ,0); //此条及以下三条为设置的颜色
$white = imagecolorallocate($im, 244,249,244);
$gray = imagecolorallocate($im, rand(200,255),rand(200,255),rand(200,255));
$red = imagecolorallocate($im, rand(200,255), rand(200,255), rand(200,255));
$rand_color = imagecolorallocate($im, rand(0,255), rand(0,255), rand(0,255));
$rand_color2 = imagecolorallocate($im, rand(0,255), rand(0,255), rand(0,255));
imagefill($im,0,0,$white); //给图片填充颜色
$pix=imagecolorallocate($im,rand(0,255),rand(0,255),rand(0,255));
mt_srand();
for($i=0;$i<100;$i )
{
imagesetpixel($im,mt_rand(0,180),mt_rand(0,35),$pix);
}
imageline($im, 0,rand(0,28), 80, rand(0,28), $rand_color);
imageline($im, 0,rand(0,28), 80, rand(0,28), $rand_color2);
//将验证码绘入图片
$mycolor = imagecolorallocate($im, 0, 78, 152);
$path = API_PATH.DS.'Base'.DS.'Tool';
putenv('GDFONTPATH=' . $path);
$font = 'simhei.ttf';
$arrstr = str_split($verifyCode);
imagettftext($im, 20, rand(0,50), 10, rand(20,30), $mycolor, $font, $arrstr[0]);
imagettftext($im, 15, rand(0,50), 20, rand(20,30), $mycolor, $font, $arrstr[1]);
imagettftext($im, 15, rand(0,50), 30, rand(20,30), $mycolor, $font, $arrstr[2]);
imagettftext($im, 15, rand(0,50), 40, rand(20,30), $mycolor, $font, $arrstr[3]);
$font2=imagecolorallocate($im,41,163,238);
imagerectangle($im,0,0,1,1,$font2);
imagepng($im);
imagedestroy($im);
}
}

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好用, 驗證碼, PHP