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PHP 7.1 Error

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Here is the error message when I attempt to upload an image using a custom external form.
Declaration of Carbon\Carbon::setTime($hour, $minute, $second = 0) should be compatible with DateTime::setTime($hour, $minute, $second = NULL, $microseconds = NULL).

PHP 7.0.10 does not throw an error, so I am assuming my custom form is not the problem also I see that this is a problem for other cms users when using PHP 7.1
I managed to get this working again by changing line 671 of concrete/vendor/nesbot/carbon/src/Carbon/Carbon.php from this
public function setTime($hour, $minute, $second = 0)

To this
public function setTime($hour, $minute, $second = NULL, $microseconds = NULL)

I am using Concrete5.7.5.13
I see on the Supermint addon help pages that this error has been reported when using Supermint with PHP 7.1
ConcreteOwl
 
ConcreteOwl replied on at Permalink Best Answer Reply
ConcreteOwl
Looks like this is a recently discovered bug in Carbon.php.
It is mentioned on GitHub at..
https://github.com/briannesbitt/Carbon/issues/844...

From what I can see, PHP 7.1 requires a fourth parameter for Microseconds to be set.
SmoothPixel replied on at Permalink Reply
SmoothPixel
Thanks @Weyboat for documenting this - it has saved me a lot of hassle.

I upgraded my local setup to PHP7.1 so that I could work on a new C5.8 site and just discovered that an older (C5.7.5.13) site throws this error.

I have simply rolled back this one site to PHP5.5 for the time being (easy to do on my Windows IIS setup).
nigelcooper66 replied on at Permalink Reply
I have this same problem on MAMP on OSX PHP 7.1.0