Conflicts with CF7 Conditional Fields plugin in PHP 8.0

Hi,

Thank you for letting me know. It looks like PHP 8 is a bit more sensitive with the array errors. If you want to fix it immediately, I think you can try changing lines 193 – 195 in cf7cf.php from:

$cookie_data_hidden_group_fields = json_decode(stripslashes($cookie_data['_wpcf7cf_hidden_group_fields']));
$cookie_data_hidden_groups = json_decode(stripslashes($cookie_data['_wpcf7cf_hidden_groups']));
$cookie_data_visible_groups = json_decode(stripslashes($cookie_data['_wpcf7cf_visible_groups']));

To:

$cookie_data_hidden_group_fields = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_hidden_group_fields']) ? $cookie_data['_wpcf7cf_visible_groups'] : ''));
$cookie_data_hidden_groups = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_hidden_groups']) ? $cookie_data['_wpcf7cf_visible_groups'] : ''));
$cookie_data_visible_groups = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_visible_groups']) ? $cookie_data['_wpcf7cf_visible_groups'] : ''));

This should make it compatible for PHP 8 and also < 7.

@jules-colle If you have time to take a look at this that would be great. Thank you for making our plugins compatible!

• This reply was modified 3 years, 8 months ago by webheadcoder. Reason: spacing issues

Thank you for your excellent response.

Just to be sure, did you intend to use “_wpcf7cf_visible_groups” in all 3 lines of code? That doesn’t seem right to me. Can you confirm that it is?

Thanks again

Oh very sorry about that. Thank you or catching that. Each line should be different. here is the corrected code:

$cookie_data_hidden_group_fields = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_hidden_group_fields']) ? $cookie_data['_wpcf7cf_hidden_group_fields'] : ''));
$cookie_data_hidden_groups = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_hidden_groups']) ? $cookie_data['_wpcf7cf_hidden_groups'] : ''));
$cookie_data_visible_groups = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_visible_groups']) ? $cookie_data['_wpcf7cf_visible_groups'] : ''));

Ok, thank you for confirming.

I think the plugins are still conflicting in php 8. My contact form won’t show any messages, i.e. validation errors, submission confirmation, etc.

No errors in the log. In the browser console, I get this error when trying to submit any CF7 form:

“Failed to load resource: the server responded with a status of 500 ()

…/contact-form-7/v1/contact-forms/123456/feedback:1”

This console error disappears in php 7.4. It also disappears if I disable either plugin when using php 8.

Any suggestions? Thanks again

That’s strange it worked earlier. I must’ve changed something while testing it. Please try this code. It is slightly different from previous versions.

Just wanted to mention again, this is an unofficial fix and the developer of the Conditional Fields plugin will need to fix this before the next update. Otherwise this fix will be erased in your files. He has generously added code to make our plugins compatible. If for some reason he doesn’t add a fix for this I’ll see what I can add to mine.

$cookie_data_hidden_group_fields = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_hidden_group_fields']) ? $cookie_data['_wpcf7cf_visible_groups'] : '[]'));
$cookie_data_hidden_groups = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_hidden_groups']) ? $cookie_data['_wpcf7cf_visible_groups'] : '[]'));
$cookie_data_visible_groups = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_visible_groups']) ? $cookie_data['_wpcf7cf_visible_groups'] : '[]'));

Excellent, thank you very much for fixing the issue. With your newest code, the conflict in php 8.0 appears to be gone. CF7 forms are showing messages again.

Yes, I understand that this temporary fix will be overridden when I update the Conditional Fields plugin. Thanks for the reminder.

Thanks again for your response. Just to confirm: In your newest code above, did you mean to use “_wpcf7cf_visible_groups” in all 3 lines? In your 2nd newest code above, you didn’t do that.

Can you confirm if “_wpcf7cf_visible_groups” should be in all 3 lines? Thanks again

oh geez. I did it again. no, _wpcf7cf_visible_groups should not be on all 3 lines. I’m not going to attempt to paste the code again…. Each line should be a different cookie_data key.

Does that affect your form? When I was testing it, I didn’t notice anything off. I did only have a very simple form though.

Thanks again for your response. In the latest version of the plugins, the issue appears to be fixed. Your temporary fix was greatly appreciated but it doesn’t appear to be needed when using the latest version of the plugins.

Thanks again

Sorry, I spoke too soon. The issue is resolved but only when using your suggested code in cf7cf.php near line 206:

$cookie_data_hidden_group_fields = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_hidden_group_fields']) ? $cookie_data['_wpcf7cf_hidden_group_fields'] : '[]'));
		$cookie_data_hidden_groups = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_hidden_groups']) ? $cookie_data['_wpcf7cf_hidden_groups'] : '[]'));
		$cookie_data_visible_groups = json_decode(stripslashes(isset($cookie_data['_wpcf7cf_visible_groups']) ? $cookie_data['_wpcf7cf_visible_groups'] : '[]'));

@jules-colle can use this code as a guide for a future update regarding PHP 8.0

Thank you again for the temporary solution provided above. I see in the change log for version 4.1.6 of your plugin, “fixed 500 error due to conflict with Conditional Fields plugin expecting an array in cookie values.”

Does that resolve the conflict discussed above with the Conditional Fields plugin? i.e. is there no longer any need to use the temporarily fix that you provided above?

Thanks again for your excellent support.

Hi,

Yes, 4.1.6 should fix the error here. I apologize for not updating this thread as it was the main reason for the fix! I found that I could set the arrays when they weren’t set and prevent the reading errors in the Conditional Fields plugin.

Perfect, thanks very much! Issue resolved.