Laravel Validation – Date Format m/y Not Accepting Specific Value - php

Question

I've got the following validation rules for basic authentication of a Payment Method (advanced things, like CVD validation, existing card, etc. is handled afterward by Moneris).
$rules = [
"type" => "required|in:visa,mastercard",
"nickname" => "required",
"credit_card_number" => "required|numeric|digits:16",
"expiry" => "required|string|size:5|date_format:m/y|after:today",
"cvd" => "required|numeric|digits:3"
];
The rule expiry is not accepting a specific value, 04/yy, but it is accepting 03/yy and 05/yy; I have no idea why this is happening, but I need it remedied. Has anyone come across this behaviour?
For reference, the result dd($request->input(), $validator->passes(), $validator->errors()); when I pass 04/19 is as follows:
array:6 [▼
"type" => "visa"
"nickname" => "Testing"
"credit_card_number" => "4242424242424242"
"expiry" => "04/19"
"cvd" => "123"
"masked_pan" => "************4242"
]
false
MessageBag {#502 ▼
#messages: array:1 [▼
"expiry" => array:1 [▼
0 => "The expiry does not match the format m/y."
]
]
#format: ":message"
}
When I send 05/19, everything works fine:
array:6 [▼
"type" => "visa"
"nickname" => "Testing"
"credit_card_number" => "4242424242424242"
"expiry" => "05/19"
"cvd" => "123"
"masked_pan" => "************4242"
]
true
MessageBag {#502 ▼
#messages: []
#format: ":message"
}

Answer 1

Looks like it's an issue with how this validation rule works in Laravel 5.4. To fix, I check the date validity of the input prepended with 01/, and if it is valid, merge that into the request, with endOfMonth() to handle after:today validation:
$mergeDate = null;
$rawInput = $request->input("expiry");
try {
$mergeDate = Carbon::createFromFormat("d/m/y", "01/".$request->input("expiry"))->endOfMonth();
} catch(\Exception $ex){}
$request->merge([
"masked_pan" => str_repeat("*", 12).substr($request->input("credit_card_number", ""), -4),
"expiry" => $mergeDate ? $mergeDate->format("d/m/y") : $request->input("expiry")
]);
So now, if I pass 04/22, it will check if 01/04/22 is valid, then convert to end of month 30/04/22, then replace that as the value passed to the validation (which also needs to be updated)
"expiry" => "required|string|size:8|date_format:d/m/y|after:today",
I also have to update and pass $messages to avoid confusion to the user:
$messages = [
"expiry.size" => "The :attribute filed must be 5 characters.",
"expiry.date_format" => "The :attribute field does not match the format m/y"
];
$validator = \Validator::make($request->all(), $rules, $messages);
And finally, replace the value with the raw input if there's an error (so the user doesn't see a value they didn't enter)
if(!$validator->passes()){
$request->merge(["expiry" => $rawInput]);
return back()->withErrors($validator)->withInput();
}
A whole bunch of nonsense, but seems to handle 04/22 and other dates just fine.