What is the difference between the functions unlink and unset? zendnwar July 24, 2012 PHP Basic 0 Comments unlink() deletes the given file from the file system. unset() makes a variable undefined. Related Posts Revolution of PHP 7: Usage of Return Types and Removal of Artifacts zendnwar January 29, 2015 28 January 2015 Boston: As the date for PHP 7’s release is approaching rapidly, the group is .. Regular Expression Basic Tutorial zendnwar July 27, 2012 Characters Character Description Example Any character except \^$.|?*+() All characters except ..