问题
Is it possible to scan /home/ directory with opendir and scandir. When i try to exec script it says permission denied what should i do?
<?php
$dir = '/home/';
$dirs = scandir($dir);
?>
<pre>
<?php print_r($dirs); ?>
</pre>
回答1:
You can use is_readable('/home/') to check if you have permission. If not you'd need to make sure the directory has read privileges, probably 0755 (rwxr-xr-x)
回答2:
For security, PHP defines a 'basedir', below which you are not allowed to access. As Aleks G says, there is also the file permissions to consider.
This question talks about how to get around basedir restrictions: How can I relax PHP's open_basedir restriction?
Tom Haigh's answer copied to here:
You can also do this easily on a per-directory basis using the Apache (assuming this is your web server) configuration file (e.g. httpd.conf)
<Directory /var/www/vhosts/domain.tld/httpdocs>
php_admin_value open_basedir "/var/www/vhosts/domain.tld/httpdocs:/var/www/vhosts/domain.tld/zend"
</Directory>
you can also completely remove the restriction with
<Directory /var/www/vhosts/domain.tld/httpdocs>
php_admin_value open_basedir none
</Directory>
回答3:
I'm not a PHP programmer, but I think your problem is that when PHP tries the opendir, it is running with the same user ID as apache has, which may not have permission to read your /home directory.
You could fix that by altering the permissions on /home, or adding the apache userid to whatever group has group ownership of home.
Possibly it is a problem in your Apache configuration file. Even if the filesystem permissions would permit it, your httpd.conf file may not allow access to /home. That would usually be the case if all of your HTML files are in /var/www.
The httpd.conf might be set up to allow serving files out of your users' home directories. In that case the permission would be granted for directories within /home but not for /home itself.
回答4:
The answer is in your question: it's a permission problem. Most likely, the process under which Apache is running does not have permission to read /home directory (or your usernamd, if running in CLI). Manually do this in a terminal:
ls -ld /home
and check the attributes.
来源：https://stackoverflow.com/questions/7188806/scanning-home-with-opendir