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php - Use URL parameter in Contact Form 7 Field

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I would like to add some PHP in my form created with Contact Form 7, a WordPress plugin. I've already tried this but it didn't work: Executing PHP Code in Contact Form 7 Textarea. Every time I insert the function, my website crashes.

I have a variable stored in a $_SESSION. I have put that variable in a hidden input and now I would like to take the value of the hidden input and place it in the contact form. How can I do this? Thanks!

Screenshot of the website and the hidden input

Screenshot of the back-end of the form

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Answer

Solution:

I think this approach can work for you.

  1. Set a url param to the link. Exampledomain.com/more-info?previous-link=home-page

  2. In your form add this field 

    [text* previous-link default:get default:post_meta "Previous link"]

You can see more examples in the docs

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