What's better of require(dirname(__FILE__).'/'.'myParent.php') than just require('myParent.php')?

Question

Lots of famous PHP scripts including WordPress use dirname(__FILE__).\'/myParent.php\' instead of just \'myParent.php\' when including files in the

Answer 1

Using dirname + file name is slightly faster, because PHP will not iterate through include_path searching for the file. If speed matters, you will likely type more.