Title: Really Simple CAPTCHA Author: Rock Lobster Inc. Published: 2009 年 3 月 10 日 Last modified: 2025 年 2 月 1 日 --- 搜索插件 ![](https://ps.w.org/really-simple-captcha/assets/banner-772x250.png?rev=880406) ![](https://ps.w.org/really-simple-captcha/assets/icon-256x256.png?rev=1047241) # Really Simple CAPTCHA 作者：[Rock Lobster Inc.](https://profiles.wordpress.org/rocklobsterinc/) [下载](https://downloads.wordpress.org/plugin/really-simple-captcha.2.4.zip) * [详情](https://cn.wordpress.org/plugins/really-simple-captcha/#description) * [评价](https://cn.wordpress.org/plugins/really-simple-captcha/#reviews) * [安装](https://cn.wordpress.org/plugins/really-simple-captcha/#installation) * [开发进展](https://cn.wordpress.org/plugins/really-simple-captcha/#developers) [支持](https://wordpress.org/support/plugin/really-simple-captcha/) ## 描述 Really Simple CAPTCHA does not work alone and is intended to work with other plugins. It is originally created for [Contact Form 7](https://contactform7.com/), however, you can use it with your own plugin. Note: This product is “really simple” as its name suggests, i.e., it is not strongly secure. If you need perfect security, you should try other solutions. #### How does it work? Really Simple CAPTCHA does not use PHP “Sessions” for storing states, unlike many other PHP CAPTCHA solutions, but stores them as temporary files. This allows you to embed it into WordPress without worrying about conflicts. When you generate a CAPTCHA, Really Simple CAPTCHA creates two files for it; one is an image file of CAPTCHA, and the other is a text file which stores the correct answer to the CAPTCHA. The two files have the same (random) prefix in their file names, for example, “a7hk3ux8p. png” and “a7hk3ux8p.txt.” In this case, for example, when the respondent answers“ K5GF” as an answer to the “a7hk3ux8p.png” image, then Really Simple CAPTCHA calculates hash of “K5GF” and tests it against the hash stored in the “a7hk3ux8p.txt” file. If the two match, the answer is confirmed as correct. #### How to use with your plugin Note: Below are instructions for plugin developers. First, create an instance of ReallySimpleCaptcha class: ``` $captcha_instance = new ReallySimpleCaptcha(); ``` You can change the instance variables as you wish. ``` // Change the background color of CAPTCHA image to black $captcha_instance->bg = array( 0, 0, 0 ); ``` See really-simple-captcha.php if you are interested in other variables. Generate a random word for CAPTCHA. ``` $word = $captcha_instance->generate_random_word(); ``` Generate an image file and a corresponding text file in the temporary directory. ``` $prefix = wp_rand(); $captcha_instance->generate_image( $prefix, $word ); ``` Then, show the image and get an answer from respondent. Check the correctness of the answer. ``` $correct = $captcha_instance->check( $prefix, $the_answer_from_respondent ); ``` If the $correct is true, go ahead. Otherwise, block the respondent — as it would appear not to be human. And last, remove the temporary image and text files, as they are no longer in use. ``` $captcha_instance->remove( $prefix ); ``` That’s all. If you wish to see a live sample of this, you can try [Contact Form 7](https://contactform7.com/captcha/). ## 屏幕截图 * [[ * screenshot-1.png ## 安装 In most cases you can install automatically from WordPress. However, if you install this manually, follow these steps: 1. Upload the entire `really-simple-captcha` folder to the `/wp-content/plugins/` directory. 2. 通过WordPress的“插件”菜单激活插件。 FYI: There is no “control panel” for this plugin. ## 常见问题 ### CAPTCHA does not work; the image does not show up. Really Simple CAPTCHA needs GD and FreeType library installed on your server. Ask your server administrator if they are installed. Also, make the temporary file folder writable. The location of the temporary file folder is managed by the instance variable `tmp_dir` of ReallySimpleCaptcha class. Note that the setting varies depending on the calling plugin. For example, Contact Form 7 uses `wp-contents/uploads/wpcf7_captcha` as the temporary folder basically, but it can use different folder depending on your settings. If you have any further questions, please submit them [to the support forum](https://wordpress.org/support/plugin/really-simple-captcha). ## 评价 ![](https://secure.gravatar.com/avatar/e627f34d1ed130ebc94bb0ca9314b4bafc8ab7d021047522bd4b25d643f858a8? s=60&d=retro&r=g) ### 󠀁[Prima, funktioniert auch auf meiner WP 6.9 einwandfrei](https://wordpress.org/support/topic/prima-funktioniert-auch-auf-meiner-wp-6-9-einwandfrei/)󠁿 [afudo1tlg](https://profiles.wordpress.org/afudo1tlg/) 2026 年 1 月 13 日 Super simple! Einfach in Contact Form 7 Version 6.1.4 einzubinden. Danke. Meine WordPress Installation: Version 6.9.PHP Version 8.4.15 ![](https://secure.gravatar.com/avatar/102d46bc8cc18bdb8bb252de26388aafa9186150f904007befeaf514af4c1f52? s=60&d=retro&r=g) ### 󠀁[Bad](https://wordpress.org/support/topic/bad-353/)󠁿 [Diego Soto](https://profiles.wordpress.org/diego-soto/) 2025 年 9 月 15 日 1 回复 I’m sorry to have to give this a bad rating. The amount of spam with Contact Form 7 was enormous. I had to remove it. ![](https://secure.gravatar.com/avatar/bed0303e15fbaf6ccf27290abc29160870a170e0eb5265e01a0c8c649c8574c7? s=60&d=retro&r=g) ### 󠀁[Works great with Gravity Forms in 2024!](https://wordpress.org/support/topic/works-great-with-gravity-forms-in-2024/)󠁿 [Maxcom](https://profiles.wordpress.org/maxcom/) 2024 年 8 月 19 日 Nothing but positives. We added this to our Gravity Form in order to obtain the dynamic math captcha. One can create a simple math captcha in GF but not dynamically changing for each form load insofar as I can determine. And GF google captcha Ver 3 is a pain with the need for google api keys. So we added this plugin and it was very easy – add the captcha field to the form, select “math” in the settings for the field and done! We find that Gravity Forms Zero Spam plugin was helping to deter spam entries but it with this captcha is 100% so far for spam prevention. Thank you Takayuki Miyoshi! ![](https://secure.gravatar.com/avatar/c910362dbfbd49f8ec8c185f618f4db62e2842297530d6f8bc8cf903d26da6c9? s=60&d=retro&r=g) ### 󠀁[Good Simple Banner](https://wordpress.org/support/topic/good-simple-banner/)󠁿 [nicolasvsedeco](https://profiles.wordpress.org/nicolasvsedeco/) 2023 年 10 月 25 日 Helo, very simple banner for cookies but there is a little bug. The banner Cookies are shown in Widgets page. ![](https://secure.gravatar.com/avatar/a9f956dcdf45addfd12c942879c61a6fa5c9c113e674409a0b825e47c0ae94ac? s=60&d=retro&r=g) ### 󠀁[Bad and not work to stabilite](https://wordpress.org/support/topic/bad-and-not-work-to-stabilite/)󠁿 [gurcantet](https://profiles.wordpress.org/gurcantet/) 2023 年 4 月 11 日 spam is continue to come… ![](https://secure.gravatar.com/avatar/ec51b32c53259c5d1abbbf367b2ca7b3f19775f179f869d413ca0f103cdd6515? s=60&d=retro&r=g) ### 󠀁[test](https://wordpress.org/support/topic/test-132/)󠁿 [rahzan](https://profiles.wordpress.org/rahzan/) 2022 年 9 月 16 日 we [ 阅读所有129条评价 ](https://wordpress.org/support/plugin/really-simple-captcha/reviews/) ## 贡献者及开发者 「Really Simple CAPTCHA」是开源软件。 以下人员对此插件做出了贡献。 贡献者 * [ Rock Lobster Inc. ](https://profiles.wordpress.org/rocklobsterinc/) * [ Takayuki Miyoshi ](https://profiles.wordpress.org/takayukister/) 「Really Simple CAPTCHA」插件已被翻译至 41 种本地化语言。 感谢[所有译者](https://translate.wordpress.org/projects/wp-plugins/really-simple-captcha/contributors) 为本插件所做的贡献。 [帮助将「Really Simple CAPTCHA」翻译成简体中文。](https://translate.wordpress.org/projects/wp-plugins/really-simple-captcha) ### 对开发感兴趣吗? 您可以[浏览代码](https://plugins.trac.wordpress.org/browser/really-simple-captcha/)， 查看[SVN仓库](https://plugins.svn.wordpress.org/really-simple-captcha/)，或通过[RSS](https://plugins.trac.wordpress.org/log/really-simple-captcha/?limit=100&mode=stop_on_copy&format=rss) 订阅[开发日志](https://plugins.trac.wordpress.org/log/really-simple-captcha/)。 ## 更新日志 #### 2.4 * Bumps up the minimum required WordPress version to 6.6. * Introduces the ReallySimpleCaptcha_Filesystem trait. * Uses SHA-256 as the hash algorithm. * Uses `wp_rand()` instead of `mt_rand()`. ## 额外信息 * 版本 **2.4** * 最后更新：**1 年前** * 活跃安装数量 **300,000+** * WordPress 版本 ** 6.6 或更高版本 ** * 已测试的最高版本为 **6.7.5** * PHP 版本 ** 7.4 或更高版本 ** * 语言 * [Albanian](https://sq.wordpress.org/plugins/really-simple-captcha/) 、 [Basque](https://eu.wordpress.org/plugins/really-simple-captcha/)、 [Catalan](https://ca.wordpress.org/plugins/really-simple-captcha/) 、 [Chinese (China)](https://cn.wordpress.org/plugins/really-simple-captcha/)、 [Chinese (Taiwan)](https://tw.wordpress.org/plugins/really-simple-captcha/) 、 [Croatian](https://hr.wordpress.org/plugins/really-simple-captcha/) 、 [Czech](https://cs.wordpress.org/plugins/really-simple-captcha/)、 [Danish](https://da.wordpress.org/plugins/really-simple-captcha/) 、 [Dutch](https://nl.wordpress.org/plugins/really-simple-captcha/)、 [Dutch (Belgium)](https://nl-be.wordpress.org/plugins/really-simple-captcha/)、 [English (Australia)](https://en-au.wordpress.org/plugins/really-simple-captcha/)、 [English (Canada)](https://en-ca.wordpress.org/plugins/really-simple-captcha/)、 [English (New Zealand)](https://en-nz.wordpress.org/plugins/really-simple-captcha/)、 [English (South Africa)](https://en-za.wordpress.org/plugins/really-simple-captcha/)、 [English (UK)](https://en-gb.wordpress.org/plugins/really-simple-captcha/) 、 [English (US)](https://wordpress.org/plugins/really-simple-captcha/) 、 [French (Canada)](https://fr-ca.wordpress.org/plugins/really-simple-captcha/)、 [French (France)](https://fr.wordpress.org/plugins/really-simple-captcha/) 、 [Galician](https://gl.wordpress.org/plugins/really-simple-captcha/) 、 [German](https://de.wordpress.org/plugins/really-simple-captcha/)、 [Hungarian](https://hu.wordpress.org/plugins/really-simple-captcha/) 、 [Italian](https://it.wordpress.org/plugins/really-simple-captcha/)、 [Japanese](https://ja.wordpress.org/plugins/really-simple-captcha/) 、 [Lithuanian](https://lt.wordpress.org/plugins/really-simple-captcha/)、 [Marathi](https://mr.wordpress.org/plugins/really-simple-captcha/) 、 [Persian](https://fa.wordpress.org/plugins/really-simple-captcha/)、 [Portuguese (Brazil)](https://br.wordpress.org/plugins/really-simple-captcha/)、 [Romanian](https://ro.wordpress.org/plugins/really-simple-captcha/) 、 [Russian](https://ru.wordpress.org/plugins/really-simple-captcha/)、 [Slovak](https://sk.wordpress.org/plugins/really-simple-captcha/) 、 [Spanish (Argentina)](https://es-ar.wordpress.org/plugins/really-simple-captcha/)、 [Spanish (Chile)](https://cl.wordpress.org/plugins/really-simple-captcha/) 、 [Spanish (Colombia)](https://es-co.wordpress.org/plugins/really-simple-captcha/)、 [Spanish (Ecuador)](https://es-ec.wordpress.org/plugins/really-simple-captcha/)、 [Spanish (Mexico)](https://es-mx.wordpress.org/plugins/really-simple-captcha/)、 [Spanish (Spain)](https://es.wordpress.org/plugins/really-simple-captcha/) 、 [Spanish (Venezuela)](https://ve.wordpress.org/plugins/really-simple-captcha/)、 [Swahili](https://sw.wordpress.org/plugins/really-simple-captcha/) 、 [Swedish](https://sv.wordpress.org/plugins/really-simple-captcha/)、 [Tibetan](https://bo.wordpress.org/plugins/really-simple-captcha/) 、 [Turkish](https://tr.wordpress.org/plugins/really-simple-captcha/) 和 [Ukrainian](https://uk.wordpress.org/plugins/really-simple-captcha/). * [翻译成简体中文](https://translate.wordpress.org/projects/wp-plugins/really-simple-captcha) * 标签 * [captcha](https://cn.wordpress.org/plugins/tags/captcha/) * [高级视图](https://cn.wordpress.org/plugins/really-simple-captcha/advanced/) ## 评级 4.2 星（最高 5 星）。 * [ 90 条 5 星评价 ](https://wordpress.org/support/plugin/really-simple-captcha/reviews/?filter=5) * [ 15 条 4 星评价 ](https://wordpress.org/support/plugin/really-simple-captcha/reviews/?filter=4) * [ 1 条 3 星评价 ](https://wordpress.org/support/plugin/really-simple-captcha/reviews/?filter=3) * [ 4 条 2 星评价 ](https://wordpress.org/support/plugin/really-simple-captcha/reviews/?filter=2) * [ 19 条 1 星评价 ](https://wordpress.org/support/plugin/really-simple-captcha/reviews/?filter=1) [Your review](https://wordpress.org/support/plugin/really-simple-captcha/reviews/#new-post) [查看全部评论](https://wordpress.org/support/plugin/really-simple-captcha/reviews/) ## 贡献者 * [ Rock Lobster Inc. ](https://profiles.wordpress.org/rocklobsterinc/) * [ Takayuki Miyoshi ](https://profiles.wordpress.org/takayukister/) ## 支持 有话要说吗？是否需要帮助？ [查看支持论坛](https://wordpress.org/support/plugin/really-simple-captcha/) ## 捐助 您愿意支持这个插件的发展吗? [ 捐助此插件 ](https://contactform7.com/donate/)