(PHP 4, PHP 5, PHP 7)
basename — Returns trailing name component of path
$path
   [, string $suffix
  ] )Given a string containing the path to a file or directory, this function will return the trailing name component.
pathA path.
On Windows, both slash (/) and backslash (\) are used as directory separator character. In other environments, it is the forward slash (/).
suffix
       If the name component ends in suffix this will also
       be cut off.
      
   Returns the base name of the given path.
  
Example #1 basename() example
<?php
echo "1) ".basename("/etc/sudoers.d", ".d").PHP_EOL;
echo "2) ".basename("/etc/sudoers.d").PHP_EOL;
echo "3) ".basename("/etc/passwd").PHP_EOL;
echo "4) ".basename("/etc/").PHP_EOL;
echo "5) ".basename(".").PHP_EOL;
echo "6) ".basename("/");
?>
The above example will output:
1) sudoers 2) sudoers.d 3) passwd 4) etc 5) . 6)
Note:
basename() operates naively on the input string, and is not aware of the actual filesystem, or path components such as "..".
Note:
basename() is locale aware, so for it to see the correct basename with multibyte character paths, the matching locale must be set using the setlocale() function.