【IMTsoft】分享一个生成验证码的php - 精易论坛

/**
* vCode (m,n,x,y) m个数字显示大小为n 边宽x 边高y
* http://blog.qita.in
* 自己改写记录session $code
*/
session_start ();
vCode (4, 15); //4个数字，显示大小为15

function vCode ($num = 4, $size = 20, $width = 0, $height = 0) {
!$width && $width = $num * $size * 4 / 5 + 5;
!$height && $height = $size + 10;
// 去掉了 0 1 O l 等
$str = "23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVW";
$code = $_GET[ ' code'];
// 画图像
$im = imagecreatetruecolor ($width, $height);
// 定义要用到的颜色
$back_color = imagecolorallocate ($im, 235, 236, 237);
$boer_color = imagecolorallocate ($im, 118, 151, 199);
$text_color = imagecolorallocate ($im, mt_rand (0, 200), mt_rand (0, 120), mt_rand (0, 120));
// 画背景
imagefilledrectangle ($im, 0, 0, $width, $height, $back_color);
// 画边框
imagerectangle ($im, 0, 0, $width-1, $height-1, $boer_color);
// 画干扰线
for ($i = 0;$i < 5;$i++) {
$font_color = imagecolorallocate ($im, mt_rand (0, 255), mt_rand (0, 255), mt_rand (0, 255));
imagearc ($im, mt_rand (- $width, $width), mt_rand (- $height, $height), mt_rand (30, $width * 2), mt_rand (20, $height * 2), mt_rand (0, 360), mt_rand (0, 360), $font_color);
}
// 画干扰点
for ($i = 0;$i < 50;$i++) {
$font_color = imagecolorallocate ($im, mt_rand (0, 255), mt_rand (0, 255), mt_rand (0, 255));
imagesetpixel ($im, mt_rand (0, $width), mt_rand (0, $height), $font_color);
}
// 画验证码
@imagefttext ($im, $size , 0, 5, $size + 3, $text_color, ' c:\\WINDOWS\\Fonts\\simsun.ttc', $code);
$_SESSION["VerifyCode"]=$code;
header ("Cache-Control: max-age=1, s-maxage=1, no-cache, must-revalidate");
header ("Content-type: image/png;charset=gb2312");
imagepng ($im);
imagedestroy ($im);
}

?>

/**<br />
 * vCode(m,n,x,y) m个数字  显示大小为n   边宽x   边高y<br />
 * http://blog.qita.in<br />
 * 自己改写记录session $code<br />
 */<br />
session_start(); <br />
vCode(4, 15); //4个数字，显示大小为15<br />
 <br />
function vCode($num = 4, $size = 20, $width = 0, $height = 0) {<br />
    !$width && $width = $num * $size * 4 / 5 + 5;<br />
    !$height && $height = $size + 10; <br />
    // 去掉了 0 1 O l 等<br />
    $str = "23456789abcdefghijkmnpqrstuvwxyzABCDEFGHIJKLMNPQRSTUVW";<br />
    $code = $_GET['code'];<br />
    // 画图像<br />
    $im = imagecreatetruecolor($width, $height); <br />
    // 定义要用到的颜色<br />
    $back_color = imagecolorallocate($im, 235, 236, 237);<br />
    $boer_color = imagecolorallocate($im, 118, 151, 199);<br />
    $text_color = imagecolorallocate($im, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120)); <br />
    // 画背景<br />
    imagefilledrectangle($im, 0, 0, $width, $height, $back_color); <br />
    // 画边框<br />
    imagerectangle($im, 0, 0, $width-1, $height-1, $boer_color); <br />
    // 画干扰线<br />
    for($i = 0;$i < 5;$i++) {<br />
        $font_color = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));<br />
        imagearc($im, mt_rand(- $width, $width), mt_rand(- $height, $height), mt_rand(30, $width * 2), mt_rand(20, $height * 2), mt_rand(0, 360), mt_rand(0, 360), $font_color);<br />
    } <br />
    // 画干扰点<br />
    for($i = 0;$i < 50;$i++) {<br />
        $font_color = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));<br />
        imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $font_color);<br />
    } <br />
    // 画验证码<br />
    @imagefttext($im, $size , 0, 5, $size + 3, $text_color, 'c:\\WINDOWS\\Fonts\\simsun.ttc', $code);<br />
    $_SESSION["VerifyCode"]=$code; <br />
    header("Cache-Control: max-age=1, s-maxage=1, no-cache, must-revalidate");<br />
    header("Content-type: image/png;charset=gb2312");<br />
    imagepng($im);<br />
    imagedestroy($im);<br />
} <br />
 <br />
?>