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public function rules()
{
return [
'field1' => 'required_if:field2,',
];
}
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$request->validate([
"old_password" =>"nullable",
"new_password" =>"confirmed|nullable|different:old_password|required_with:old_password",
"password_confirmation" =>"nullable|required_with:new_password|required_with:old_password"
]);