is_link
Safe_mode restrictions ignored means:
cant read by read() so is_readable() = false.
even if safe_mode_include_dir is set and include does works, is_readable() is false to. :(
(php5)
is_readable
(PHP 4, PHP 5)
is_readable — Zjistí, zda lze ze souboru číst
Popis
bool is_readable ( string $filename )Vrací TRUE, když soubor existuje a lze z něj číst.
Mějte na paměti, že PHP může přistupovat k souboru s právy, kterými disponuje WWW server (obvykle 'nobody'). Omezení bezpečného režimu (safe mode limitations) are not taken into account.
Výsledek této funkce je cachován. Více detailů - viz clearstatcache().
Viz také is_writable().
add a note
User Contributed Notesis_readable
jascha át gmx dót com
07-Nov-2006 09:58
07-Nov-2006 09:58
jo at durchholz dot org
30-Jan-2006 12:15
30-Jan-2006 12:15
DrTebi at yahoo dot com is wrong. is_readable() checks whether you can do file_get_contents() or similar calls, no more, no less. If the location given returns a 500 or 403 error, you can still read() that (you'll simply get the error page), but it's still read()able. Using is_readable to check the validity of a URL is simply the wrong function.
DrTebi at yahoo dot com
13-Oct-2005 12:22
13-Oct-2005 12:22
Be careful when using is_readable on symbolic links.
is_readable will return true if the file the symbolic link is pointing to is readable.
The problem is that if the server does NOT allow to follow symbolic links, is_readable will still return true, but e.g. redirecting to the sybolic link will not work. For Apache, make sure that at the server, virtual host configuration level, or inside a directory container you have set
Options +FollowSymLinks
As an example, let's say you have at the document root directory:
index.php -- the script using is_readable
my_linked_page.html -- a regular HTML page
my_link -- a link pointing to my_linked_page.html
Now in index.php:
<?php
if (is_readable('my_link')) {
header('Location: /my_link');
}
?>
If FollowSymLinks is forbidden, this will not work, if allowed, it will.
26-Jul-2005 10:08
Sometimes in situations where file_exists fails (returns false even though the file does exist) stat will work.
php dot 5 dot ce at spamgourmet dot com
12-Jan-2005 09:32
12-Jan-2005 09:32
If you are using ACL, watch out for Bug #30931 (now open without any reaction for about 2 month, alltough an solution exists.)