realpath

(PHP 4, PHP 5, PHP 7)

realpathReturns canonicalized absolute pathname

Descrierea

realpath ( string $path ) : string

realpath() expands all symbolic links and resolves references to /./, /../ and extra / characters in the input path and returns the canonicalized absolute pathname.

Parametri

path

The path being checked.

Notă:

Whilst a path must be supplied, the value can be an empty string. In this case, the value is interpreted as the current directory.

Valorile întoarse

Returns the canonicalized absolute pathname on success. The resulting path will have no symbolic link, /./ or /../ components. Trailing delimiters, such as \ and /, are also removed.

realpath() returns FALSE on failure, e.g. if the file does not exist.

Notă:

The running script must have executable permissions on all directories in the hierarchy, otherwise realpath() will return FALSE.

Notă:

For case-insensitive filesystems realpath() may or may not normalize the character case.

Notă:

The function realpath() will not work for a file which is inside a Phar as such path would be a virtual path, not a real one.

Notă: Deoarece tipul întreg al PHP este cu semn și multe platforme utilizează întregi de 32 de biți, unele funcții ale sistemului de fișiere pot întoarce rezultate neașteptate pentru fișiere ce depășesc 2GB.

Istoricul schimbărilor

Versiune Descriere
5.3.0 Prior to this release, if only the last path component did not exist, realpath() would not fail on *BSD systems. realpath() now fails in this case.
5.2.1 Prior to this version, realpath() returned FALSE if path is an empty string or NULL.

Exemple

Example #1 realpath() example

<?php
chdir
('/var/www/');
echo 
realpath('./../../etc/passwd') . PHP_EOL;

echo 
realpath('/tmp/') . PHP_EOL;
?>

Exemplul de mai sus va afișa:

/etc/passwd
/tmp

Example #2 realpath() on Windows

On windows realpath() will change unix style paths to windows style.

<?php
echo realpath('/windows/system32'), PHP_EOL;

echo 
realpath('C:\Program Files\\'), PHP_EOL;
?>

Exemplul de mai sus va afișa:

C:\WINDOWS\System32
C:\Program Files

A se vedea și

  • basename() - Returns trailing name component of path
  • dirname() - Returns a parent directory's path
  • pathinfo() - Returns information about a file path

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