Include vs Require
Both (include and require) are used for including the files only. But the difference between these two is how they handle if the included file is not found.
Include will produce the warning if the included file is not found and proceed the things.But require will throw the error if the included file is not found and stop the execution.
Above rule is applied for include_once and require_once. But include_once and require_once will include the file only once irrespective of how many times we included the file.
