Developer's cookbook

Sharing reCAPTCHA API keys and tokens

With Contact Form 7’s reCAPTCHA (v3) integration ability, you can protect your contact forms from spambots. Since a spambot targets everything—not only contact forms—you may also want to protect other components on your website (such as comment forms) using reCAPTCHA technology.

Fortunately, Contact Form 7’s reCAPTCHA integration is designed to be open and accessible to other components. In this recipe, I’ll tell you how you can retrieve reCAPTCHA API keys and tokens from Contact Form 7 and reuse the data within your own reCAPTCHA plugin.

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Announcement

New official logo

I’m excited to present Contact Form 7’s official logo!

Contact Form 7 logo

This elegant, minimalistic logo was designed by Cheung Vong, an artist, designer, developer, and long-time user of Contact Form 7. For more than ten years since its beginning, Contact Form 7 has had no official logo. Now I can say proudly, “This is our logo!” Thank you for your great work, Cheung!

What’s the mountain?

The mountain seen in the icon is Mount Fuji. Because I have used Hokusai’s old print art as a temporary logo for many years, and users are familiar with the image, I asked the designer to continue using Mount Fuji as a motif in the new logo.

Announcement, Security

Heads-up about spreadsheet vulnerabilities

Vulnerabilities affecting spreadsheet applications like Microsoft Excel and OpenOffice Calc have been known to exist for over 5 years, and unfortunately they seem to be still unresolved.

While it is not a vulnerability of WordPress, or its plugins, because there must be so many users of our products who are at risk of these vulnerabilities, and the damage from it could be huge, I think I should write an article here to alert you of the issue.

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Troubleshooting

Preventing multiple submissions — why this is a terrible idea.

Receiving multiple emails with the same content from the same sender in a short period of time — I often receive support requests like this.

Although some suppose these are caused by a bug or made by spam bots, in most cases they are created by real humans. It is real well meaning people who are making multiple submissions through contact forms on their sites.

They ask me if they can make Contact Form 7 prevent such multiple submissions. Actually this is not difficult at all. You have some options to do so, such as disabling the Submit button after the first submission.

You might think that such functions should be activated by default if it is not difficult. In reality such functions are intentionally not implemented in this plugin — because it obviously leads to a terrible outcome.

Continue reading Preventing multiple submissions — why this is a terrible idea. →

Just another contact form plugin for WordPress. Simple but flexible.