PHP 驗證碼類

呼叫方法：

$captcha = new captcha();

$captcha->createcaptcha();

**：

<?php

/** * created by phpstorm.
* user: ming
* date: 2018/7/15
* time: 下午4:34
*/class captcha
/*** createcode
* @return string:生成的驗證碼字串
*/protected function createcode()
}public function __get($name)
}public function __destruct()
/*** typestr 返回對用型別的字串
* @param $type 0:number, 1:lowercase, 2:toupper
* @return string
*/protected function typestr($type)
/*** randstr 返回打亂後的字串
* @param $str
* @return string
*/protected function randstr($str)
/*** numbercode
* @return string:數字驗證碼
*/protected function numbercode()
/*** lettercode
* @return string:字母驗證碼
*/protected function lettercode()
/*** @return string:數字字母混合驗證碼
*/protected function numletcode()
/*** createcaptcha:生成驗證碼
*/public function createcaptcha()
protected function createimage()
protected function fillcolor()
protected function tone($rank)
protected function lightcolor()
protected function darkcolor()
protected function fillcode()
}protected function filldisturb()
}protected function showimage()
}

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