/library/Common/Plugin/ImgCode.php

<?php

/**

* ???????

*

*/



class Common_Plugin_ImgCode extends Zend_Controller_Plugin_Abstract {



    /**

     * ???????

     *

     * @static

     * @access public

     *

     * @param string $length ??

     * @param string $mode ?? 0 ?? 1:???2????? 3:???? 4:??????

     * @param string $type ????

     * @param string $width ??

     * @param string $height ??

     *

     * @return string

     * @throws ThinkExecption

     */

    function image($length = 4, $mode = 4, $type = 'png', $width = 50, $height = 25) {

        $randval = $this->rand_string($length, $mode); //?????

        $authCode = new Zend_Session_Namespace('Auth_Code'); //???????

        $authCode->imagecode = $randval; //??session????????session?



        //$_SESSION['IMGCODE']= $randval; //??????$_SESSION['IMGCODE']?



        $width = ($length * 9 + 10) > $width ? $length * 9 + 10 : $width;

        if ($type != 'gif' && function_exists('imagecreatetruecolor')) {

            $im = @ imagecreatetruecolor($width, $height);

        } else {

            $im = @ imagecreate($width, $height);

        }

        $r = Array (

            225,

            255,

            255,

            223

        );

        $g = Array (

            225,

            236,

            237,

            255

        );

        $b = Array (

            225,

            236,

            166,

            125

        );

        $key = mt_rand(0, 3);



        $backColor = imagecolorallocate($im, $r[$key], $g[$key], $b[$key]); //???????

        $borderColor = imagecolorallocate($im, 100, 100, 100); //???

        $pointColor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255)); //???



        @ imagefilledrectangle($im, 0, 0, $width -1, $height -1, $backColor);

        @ imagerectangle($im, 0, 0, $width -1, $height -1, $borderColor);

        $stringColor = imagecolorallocate($im, mt_rand(0, 200), mt_rand(0, 120), mt_rand(0, 120));

        // ??

        for ($i = 0; $i < 10; $i++) {

            $fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));

            imagearc($im, mt_rand(-10, $width), mt_rand(-10, $height), mt_rand(30, 300), mt_rand(20, 200), 55, 44, $fontcolor);

        }

        for ($i = 0; $i < 25; $i++) {

            $fontcolor = imagecolorallocate($im, mt_rand(0, 255), mt_rand(0, 255), mt_rand(0, 255));

            imagesetpixel($im, mt_rand(0, $width), mt_rand(0, $height), $pointColor);

        }



        @ imagestring($im, 5, 5, 3, $randval, $stringColor);

        $this->output($im, $type);

    }



    function output($im, $type = 'png') {

        header("Content-type: image/" . $type);

        $ImageFun = 'Image' . $type;

        $ImageFun ($im);

        imagedestroy($im);

    }



    /**

     * ???????????????? ????6? ???????

     *

     * @param string $len ??

     * @param string $type ????

     * 0 ?? 1 ?? ?? ??

     * @param string $addChars ????

     * @return string

     */

    function rand_string($len = 6, $type = '', $addChars = '') {

        $str = '';

        switch ($type) {

            case 0 :

                $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz' . $addChars;

                break;

            case 1 :

                $chars = str_repeat('0123456789', 3);

                break;

            case 2 :

                $chars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' . $addChars;

                break;

            case 3 :

                $chars = 'abcdefghijklmnopqrstuvwxyz' . $addChars;

                break;

            default :

                // ????????????oOLl???01???????addChars??

                $chars = 'ABCDEFGHIJKMNPQRSTUVWXYZabcdefghijkmnpqrstuvwxyz23456789' . $addChars;

                break;

        }

        if ($len > 10) { //?????????????

            $chars = $type == 1 ? str_repeat($chars, $len) : str_repeat($chars, 5);

        }

        if ($type != 4) {

            $chars = str_shuffle($chars);

            $str = substr($chars, 0, $len);

        } else {

            // ?????

            for ($i = 0; $i < $len; $i++) {

                $str .= substr($chars, floor(mt_rand(0, mb_strlen($chars, 'utf-8') - 1)), 1);

            }

        }

        return $str;

    }



}





?>