Online PHP editor | output for i560r

<?php $name = 'John Doe, Ph.D'; $get_name = preg_replace(array('/^([a-z]+(?:\s+[a-z]+)?).*$/', '/\s+/'), array('$1', '_'), strtolower($name)); echo $get_name; echo "\n"; $name = 'Fred , M.Sc'; $get_name = preg_replace(array('/^([a-z]+(?:\s+[a-z]+)?).*$/', '/\s+/'), array('$1', '_'), strtolower($name)); echo $get_name; echo "\n"; $name = 'Fred John Doe , B.A'; $get_name = preg_replace(array('/^([a-z]+(?:\s+[a-z]+)?).*$/', '/\s+/'), array('$1', '_'), strtolower($name)); echo $get_name; echo "\n"; $name = 'John Doe'; $get_name = preg_replace(array('/^([a-z]+(?:\s+[a-z]+)?).*$/', '/\s+/'), array('$1', '_'), strtolower($name)); echo $get_name; echo "\n"; $name = 'Fred'; $get_name = preg_replace(array('/^([a-z]+(?:\s+[a-z]+)?).*$/', '/\s+/'), array('$1', '_'), strtolower($name)); echo $get_name;