Most Referenced Functions
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  » htmlentities()
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  » fopen()
  » preg_match()
  » header()
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  » ob_flush()
  » htmlspecialchars()
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  » strpos()
  » nl2br()
  » setcookie()
  » urlencode()
  » preg_split()
  » ereg()
  » ereg_replace()
  » var_dump()

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PHP Functions

Function: dirname

(PHP 3, PHP 4, PHP 5)

dirname -- Returns directory name component of path

Description

string dirname ( string path )

Given a string containing a path to a file, this function will return the name of the directory.

On Windows, both slash ( / ) and backslash ( \ ) are used as directory separator character. In other environments, it is the forward slash ( / ).

Example 1. dirname() example

<?php
$path = "/etc/passwd";
$file = dirname($path); // $file is set to "/etc"
?>

Note: In PHP 4.0.3, dirname() was fixed to be POSIX-compliant. Essentially, this means that if there are no slashes in path , a dot (' . ') is returned, indicating the current directory. Otherwise, the returned string is path with any trailing /component removed. Note that this means that you will often get a slash or a dot back from dirname() in situations where the older functionality would have given you the empty string.

dirname() has changed its behaviour in PHP 4.3.0. Check the following examples:

<?php

//before PHP 4.3.0
dirname('c:/'); // returned '.'

//after PHP 4.3.0
dirname('c:/'); // returns 'c:'

?>

dirname() has been binary safe since PHP 5.0.0

Related Function(s)

  • basename()
  • pathinfo()
  • realpath()
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