PHP basename() Function: Syntax, Parameters, Return Value, Examples, and Notes

PHP function basename() is used to obtain the filename portion of a given path.

Basic syntax:

string basename ( string $path [, string $suffix ] )

Parameter description:

$path

: required, the path from which to extract the filename. $suffix: optional, a file extension to be removed from the result.

Return value:

Returns the filename part of the provided path.

Example:

$path = '/dir1/dir2/file.txt';
 echo basename($path); // output: file.txt

$suffix = '.txt';
 echo basename($path, $suffix); // output: file

If $path contains directory components, basename() ignores them and returns only the filename; if $path ends with a slash, an empty string is returned.

When the optional $suffix parameter is provided, basename() removes that suffix from the filename.

Notes:

basename()

does not verify whether the file exists; it merely processes the path string.

The function does not handle query strings in URLs; it returns only the filename portion.

It works correctly with both Windows and Unix style paths.

Summary:

basename()

is a widely used PHP function for extracting the filename from a path, offering a simple and effective way to handle filename‑related operations.

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