(PHP 4, PHP 5, PHP 7)
realpath — Returns canonicalized absolute pathname
$path
)
realpath() expands all symbolic links and
resolves references to '/./', '/../' and extra '/' characters in
the input path
and returns the canonicalized
absolute pathname.
path
The path being checked.
Note:
Whilst a path must be supplied, the value can be blank or
NULL
In these cases, the value is interpreted as the current directory.
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.
Note:
The running script must have executable permissions on all directories in the hierarchy, otherwise realpath() will return
FALSE
.
Note:
For case-insensitive filesystems realpath() may or may not normalize the character case.
Note: PHP의 정수형은 부호 있는 형식이고 많은 플랫폼이 32비트 정수를 사용하기에, 몇몇 파일시스템 함수는 2GB가 넘는 파일에 대해서 예측할 수 없는 결과를 반환합니다.
버전 | 설명 |
---|---|
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 .
|
Example #1 realpath() example
<?php
chdir('/var/www/');
echo realpath('./../../etc/passwd') . PHP_EOL;
echo realpath('/tmp/') . PHP_EOL;
?>
위 예제의 출력:
/etc/passwd /tmp
Example #2 realpath() on Windows
On windows realpath() will change unix style paths to windows style.
<?php
echo realpath('/windows/system32');
echo realpath('C:\Program Files\\');
?>
위 예제의 출력:
C:\WINDOWS\System32 C:\Program Files