Use of undefined constant i – assumed 'i' (this will throw an Error in a future version of PHP) (laravel post method error)

I want to enter an multiple field entered data in table with for loop
but I am getting an error in the post method.

The error is:

Use of undefined constant i – assumed ‘i’ (this will throw an Error in a future version of PHP)

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controller code:

$degree = $request->degree;
        if($degree > 0)
        {
            for($i=0;$i<count($degree);$i++){
                $edu = new education;
                $edu->degree = $request->degree[i];
                $edu->clg = $request->clg[i];
                $edu->yoc = $request->yoc[i];
                $edu->save();
            }
        }

so, please suggest me what I can do.

>Solution :

here there is a silly mistake bro you not remember to use $i inside loop for the degree, clg and yoc