问题
I am getting the following error from Apache
[Sat Mar 19 23:10:50 2011] [warn] mod_fcgid: stderr: PHP Fatal error: require_once() [function.require]: Failed opening required '/common/configs/config_templates.inc.php' (include_path='.:/usr/share/pear:/usr/share/php') in /home/viapics1/public_html/common/configs/config.inc.php on line 158
I am definately not an expert of Apache but the file config.inc.php & config_templates.inc.php are there. I also tried navigating to a test.html page I placed in common/configs/ so I assume there is no rights issues going on. I also set the rights on config_templates.inc.php to give everyone read, write, and execute rights. Not sure what to do at this point, I checked to see if there was a /usr/share/php directory and I found there was not but when I did yum install php it said it had the latest. Ideas?
回答1:
It's not actually an Apache related question. Nor even a PHP related one. To understand this error you have to distinguish a path on the virtual server from a path in the filesystem.
require operator works with files. But there is no
/common/configs/config_templates.inc.php
file on the server, but rather
/home/viapics1/public_html/common/configs/config_templates.inc.php
The
/home/viapics1/public_html
part is called the Document root and it connects the virtual world with the real one. Luckily, web-servers usually have the document root in a configuration variable that they share with PHP. So if you change your code to something like
require_once $_SERVER['DOCUMENT_ROOT'].'/common/configs/config_templates.inc.php';
it will work from any file placed in any directory.
Update: eventually I wrote an article that explains the difference between relative and absolute paths, in the file system and on the web server, which explains the matter in detail, and contains some practical solutions.
Unfortunately, such a handy variable doesn't exist when you run your script from a command line. In this case a thechnique called "a single entry point" is to the rescue. You may refer to the article above for the details as well.
回答2:
If you have SELinux running, you might have to grant httpd permission to read from /home dir using:
sudo setsebool httpd_read_user_content=1
回答3:
Run php -f /common/configs/config_templates.inc.php to verify the validity of the PHP syntax in the file.
回答4:
Just in case this helps anybody else out there, I stumbled on an obscure case for this error triggering last night. Specifically, I was using the require_once method and specifying only a filename and no path, since the file being required was present in the same directory.
I started to get the 'Failed opening required file' error at one point. After tearing my hair out for a while, I finally noticed a PHP Warning message immediately above the fatal error output, indicating 'failed to open stream: Permission denied', but more importantly, informing me of the path to the file it was trying to open. I then twigged to the fact I had created a copy of the file (with ownership not accessible to Apache) elsewhere that happened to also be in the PHP 'include' search path, and ahead of the folder where I wanted it to be picked up. D'oh!
回答5:
Hey I just had this problem and found that I wasn't looking at the folder location closely enough:
I had
require_once /vagrant/public/liberate/**APP**/vendor/autoload.php
What worked was:
require_once /vagrant/public/liberate/vendor/autoload.php
It was very easy (as a beginner) to overlook this very unnoticeable issue. Yes I do realize that the require issue being logged points directly to the issue at hand, but if you are a beginner, like me, these things can be easily overlooked.
FIX:
Have a good look at the debug of ( __ Dir __ '/etc/etc/etc/file.php') then have your file system open in a different window, and map the two directly. If there is even the slightest difference this require will not work and the above error will be spat out.
回答6:
You could fix it with the PHP constant __DIR__
require_once __DIR__ . '/common/configs/config_templates.inc.php';
It is the directory of the file. If used inside an include, the directory of the included file is returned. This is equivalent to dirname
__FILE__. This directory name does not have a trailing slash unless it is the root directory. 1
回答7:
I was having the exact same issue, I triple checked the include paths, I also checked that pear was installed and everything looked OK and I was still getting the errors, after a few hours of going crazy looking at this I realized that in my script had this:
include_once "../Mail.php";
instead of:
include_once ("../Mail.php");
Yup, the stupid parenthesis was missing, but there was no generated error on this line of my script which was odd to me
来源：https://stackoverflow.com/questions/5364233/php-fatal-error-failed-opening-required-file