The array functions allow you to manipulate and access arrays. In PHP , the array functions are the part of the PHP core. There is no installation needed to use these functions. Function Description array() Create an array array_change_key_case() Changes the case of all keys in an array. array_chunk() Split …

The filesystem functions allow you to access and manipulate the filesystem.   Function Description basename() Returns the filename component of a path. chmod() Changes the file mode. copy() Copies a file chgrp() Changes the file group chown() Changes the file owner. delete() See unlink() or unset() disk_free_space() Returns available space …