基于php验证码函数的使用示例
发布时间:2022-07-12 12:23:57 所属栏目:PHP教程 来源:互联网
导读:复制代码 代码如下:www.CuoXIn.com function _code($_code_length = 4, $_width = 75, $_height = 25){ for($i=0;$i$_code_length;$i++){ $_nmsg .= dechex(mt_rand(0,15)); } $_SESSION[code] = $_nmsg; $_img = imagecreatetruecolor($_width, $_height)
复制代码 代码如下:www.CuoXIn.com function _code($_code_length = 4, $_width = 75, $_height = 25){ for($i=0;$i<$_code_length;$i++){ $_nmsg .= dechex(mt_rand(0,15)); } $_SESSION["code"] = $_nmsg; $_img = imagecreatetruecolor($_width, $_height); $_white = imagecolorallocate($_img, 250, 250, 250); imagefill($_img, 0, 0, $_white); $_gray = imagecolorallocate($_img, 196, 196, 196); imagerectangle($_img, 0, 0, $_width-1, $_height-1, $_gray); for ($i=0; $i < 6; $i++) { $_md_color = imagecolorallocate($_img, mt_rand(200,255), mt_rand(200,255), mt_rand(200,255)); imageline($_img, mt_rand(0,$_width), mt_rand(0, $_height),mt_rand(0,$_width), mt_rand(0, $_height), $_md_color); } for ($i=0; $i < 50; $i++) { $_md_color = imagecolorallocate($_img, mt_rand(200,255), mt_rand(200,255), mt_rand(200,255)); imagestring($_img, 1, mt_rand(1,$_width-5), mt_rand(1, $_height-5), "*", $_md_color); } for ($i=0; $i < $_code_length ; $i++) { $_md_color = imagecolorallocate($_img, mt_rand(0,102), mt_rand(0,102), mt_rand(0,102)); imagestring($_img, 5, $i * $_width/$_code_length+ mt_rand(1, 10), mt_rand(1, $_height/2), $_SESSION["code"][$i], $_md_color); } header("Content-Type:image/png"); imagepng($_img); imagedestroy($_img); }。 (编辑:聊城站长网) 【声明】本站内容均来自网络,其相关言论仅代表作者个人观点,不代表本站立场。若无意侵犯到您的权利,请及时与联系站长删除相关内容! |
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