readlink

(PHP 4, PHP 5)

readlink — Restituisce il target di un link simbolico

Descrizione

string readlink ( string $path )

readlink() si comporta analogamente alla funzione readlink di C e restituisce i conenuti del link simbolico path oppure FALSE in caso d'errore.

Example #1 Esempio di uso di readlink()


<?php
// ad esempio visualizza /boot/vmlinux-2.4.20-xfs
echo readlink('/vmlinuz');

?>

Nota: Questa funzione non è implementata sulle piattaforme Windows.

Vedere anche symlink(), readlink() e linkinfo().

add a note User Contributed Notes readlink - [2 notes]

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-1

MarkAndrewSlade at gmail dot com ¶

4 years ago


This will trigger a warning and return false if you pass it a non-symlink.  If the file doesn't exist, it will trigger a differently worded warning.



mslade@jupiter ~$ touch a

mslade@jupiter ~$ ln -s a b

mslade@jupiter ~$ ls -l {a,b}

-rw------- 1 mslade mslade 0 2009-06-10 15:27 a

lrwxrwxrwx 1 mslade mslade 1 2009-06-10 15:27 b -> a

mslade@jupiter ~$ php -r "var_dump(readlink('b'));"

string(1) "a"

mslade@jupiter ~$ php -r "var_dump(readlink('a'));"



Warning: readlink(): Invalid argument in Command line code on line 1

bool(false)

mslade@jupiter ~$ php -r "var_dump(readlink('c'));"



Warning: readlink(): No such file or directory in Command line code on line 1

bool(false)

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-2

mookowg at gmail dot com ¶

2 years ago


In case anyone was getting confused:

     This is NOT the coreutil "readlink".

 

realpath("./path/of/file") is equivalent to readlink -e ./path/of/file

which FYI i think is a terrible design choice choice, since the functionality

of readline -f is hard to mimic, but readline -e is NOT

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