Royal Bg questions

Royal Bg answers

• PHP "if" statement looking for between two numbers
• Why do we need to avoid mutations while coding? What is a mutation?
• Undefined index even with isset
• Using $this when not in object context - Laravel 4 PHP 5.4.12
• check if a querystring exists, if not create one - PHP
• How get value for unchecked checkbox in checkbox elements when form posted?
• Why might you use IEnumerable as a method return type or in a constructor [closed]
• Gap fill in priority column + keep order