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<?php$code = '<span style="color:rgb(' . mt_rand( 0, 255 ) . ' ' . mt_rand( 0, 255 ) . ' ' . mt_rand( 0, 255 ) . ')">' . mt_rand( 0, 9 ) . '</span>';$code .= '<span style="color:rgb(' . mt_rand( 0, 255 ) . ' ' . mt_rand( 0, 255 ) . ' ' . mt_rand( 0, 255 ) . ')">' . mt_rand( 0, 9 ) . '</span>';$code .= '<span style="color:rgb(' . mt_rand( 0, 255 ) . ' ' . mt_rand( 0, 255 ) . ' ' . mt_rand( 0, 255 ) . ')">' . mt_rand( 0, 9 ) . '</span>';$code .= '<span style="color:rgb(' . mt_rand( 0, 255 ) . ' ' . mt_rand( 0, 255 ) . ' ' . mt_rand( 0, 255 ) . ')">' . mt_rand( 0, 9 ) . '</span>';function regpost(){global $massage;global $code;$username = $_POST['username'];$password = $_POST['password'];$password2 = $_POST['password2'];$ayuan = $_POST['ayuan'];$massage = '注册成功';if ( empty( $username ) ) {$massage = '请输入账号';return;}if ( ord( $username ) < 65 || ord( $username ) > 90 && strlen( $username ) < 6 ) {$massage = '用户名首个字符必须是字母且大于6位';return;}if ( empty( $password ) ) {$massage = '请输入密码';return;}if ( $password2 !== $password ) {$massage = '两次密码不一致';return;}if ( empty( $ayuan ) ) {$massage = '请输入验证码';return;}if ( strcasecmp( $ayuan, $code ) !== 0 ) {$massage = '验证码不正确';return;}}if ( $_SERVER['REQUEST_METHOD'] === 'POST' ) {regpost();}?><!DOCTYPE html><html lang = 'zh'><head><meta charset = 'UTF-8'><meta name = 'viewport' content = 'width=device-width, initial-scale=1.0'><meta http-equiv = 'X-UA-Compatible' content = 'ie=edge'><title>用户注册</title></head><body><form action = "" method = 'post'><label>账号:</label><input name = 'username' value = "<?php echo isset($_POST['username']) ? $_POST['username'] : '' ?>" /><br /><label>密码:</label><input type = 'password' name = 'password' /><br /><label>确认密码:</label><input type = 'password' name = 'password2' /><br /><label>验证码:<input type = 'text' name = 'ayuan' style = 'width: 50px;'><?phpecho $code;?></label><br /><?php if ( isset( $massage ) ) : ?><p><?php echo $massage;?></p><?php endif ?><button>注册</button></form></body></html>
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