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Tells whether the filename is readable
(PHP 4, PHP 5)
Example 656. is_readable() example<?phpRelated Examples ( Source code ) » is_readable Examples ( Source code ) » Is the file readable Examples ( Source code ) » Checking the Mode of a File Code Examples / Notes » is_readabletakeda
this function also can be used if you want check permissions for directory.
27-jul-2005 03:08
Sometimes in situations where file_exists fails (returns false even though the file does exist) stat will work.
jascha át gmx dót com
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) php dot 5 dot ce
If you are using ACL, watch out for Bug #30931 (now open without any reaction for about 2 month, alltough an solution exists.)
jo
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
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. |
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basename chgrp chmod chown clearstatcache copy delete dirname disk_free_space disk_total_space diskfreespace fclose feof fflush fgetc fgetcsv fgets fgetss file_exists file_get_contents file_put_contents file fileatime filectime filegroup fileinode filemtime fileowner fileperms filesize filetype flock fnmatch fopen fpassthru fputcsv fputs fread fscanf fseek fstat ftell ftruncate fwrite glob is_dir is_executable is_file is_link is_readable is_uploaded_file is_writable is_writeable lchgrp lchown link linkinfo lstat mkdir move_uploaded_file parse_ini_file pathinfo pclose popen readfile readlink realpath rename rewind rmdir set_file_buffer stat symlink tempnam tmpfile touch umask unlink |
