title: How to make a field required Laravel Validation?
body: <p>I have a bunch of inputs on my form, and the field under consideration has various validation requirements. To simplify, I have created an analogy:</p>
  
  <p>I have inputs A, B, C and D. A, B, and C are all array inputs. 'A' should be required if B and C are present, but not required if input 'D' is a value of 1 even if B and C are present. The same requirements are present for inputs 'B' and 'C'.</p>
  
  <p>My initial guess was: A.* => 'required_with:B.<em>,C.</em> | required_if:D,0' 
  but this doesn't really work.</p>
  
  <p>I'm terrible with custom validation, so if a step-by-step method of a custom validator is needed, can you please provide a full code?</p>
  
  <p>Thank you!</p>