PHP Warning Unknown failed to open stream

Question

I edited the apache httpd conf file recently for the mod rewrite to work  I don t know if this problem originated from that or not  but i m getting this problem from that day  This is what I see on the frontend when I run the software -       Server error The website encountered   an error while retrieving   http   localhost prestashop   It may   be down for maintenance or configured   incorrectly    There is no specific file that triggers this  But I saw that usually small programs that consists of 4-5 php files  runs fine  but softwares with a lot of files like PrestaShop  don t  I checked the logs and this is what I found    Wed Mar 16 19 33 39 2011   error   client   1  PHP Warning   Unknown  failed to open stream  Permission denied in Unknown on line 0  Wed Mar 16 19 33 39 2011   error   client   1  PHP Fatal error   Unknown  Failed opening required   var www html yomig index php   include path     usr share pear  usr share php   in Unknown on line 0  Wed Mar 16 19 33 39 2011   error   client   1  File does not exist   var www html favicon ico  Wed Mar 16 19 33 41 2011   error   client   1  PHP Warning   Unknown  failed to open stream  Permission denied in Unknown on line 0  Wed Mar 16 19 33 41 2011   error   client   1  PHP Fatal error   Unknown  Failed opening required   var www html yomig index php   include path     usr share pear  usr share php   in Unknown on line 0

User · Answer

Except the permissions  the problem can be open basedir  If you are using it  and I suggest to use it  then check the settings at the VirtualHost     php admin value open basedir  lt YOUR ROOT gt

User · Answer

Go to folder htdocs  cd htdocs  Execute  chmod -R 755 sites  No need to sudo

User · Answer

In Fedora 25  it turned out to be an SE Linux issue  and the notification gave this solution which worked for me   setsebool -P httpd read user content 1

User · Answer

Here some guide how to fix it  Go to    cd  var www  sudo chown www-data www-data   -R  sudo usermod -a -G www-data username   Change userneme with your username  I hope it help

User · Answer

It happened to me today with  home user public html index php and the solution was to do chmod o x  home user as this directory has to have the X as otherwise the apache server can t list files  i e  do ls

User · Answer

I just came across of this same problem and in my case it was caused by selinux  Disabling it solved the issue  And no  I don t need selinux on my workstation  thank you

User · Answer

I got this problem when insert wrong file address into  htaccess  php value auto prepend file   home user wrong address config php    So if you use auto prepend file check your file path  It called from  htaccess so PHP can t determine error file and line

User · Answer

Just quote for above answer of user1992554  This one worked perfectly for me in Linux Mint  to get rid of Warning  failed to open stream  Permission denied  cd  var www  sudo chown www-data www-data   -R  sudo usermod -a -G www-data username

User · Answer

In my mind true way is     add READ permission to all directories and files under your DocumentRoot sudo chmod  r  path to DocumentRoot  -R    add EXECUTE permission to all DIRECTORIES under your DocumentRoot find  path to DocumentRoot  -type d -exec chmod  x

User · Answer

It is a SELinux blocking issue  Linux prevented httpd access  Here is the solution     restorecon   var www html wiki index php    restorecon -R   var www html wiki index php     sbin restorecon   var www html wiki index php

User · Answer

If you are running Fedora  make sure SELinux is not interfering You fix this with this command        sudo  sbin restorecon -R  var www      More info here  linuxquestions org questions linux-server-73

User · Answer

Once  this happens to me as well  and when I googled the matter  I got to know that this happens when the permissions on the file is wrongfully set to 000  which means that no one can read  write  or execute that file   Then I just changed my file permission privilege into Read  amp  Write and it s worked for me   To change file permission settings on mac  Right click on the particular file and click on Get info from dropdown menu and refer to the sharing and permissions panel and change privilege settings into Read  amp  Write  More  http   www itoctopus com warning-unknown-failed-to-open-stream-permission-denied-in-unknown-on-line-0-error-in-joomla

User · Answer

Experienced the same error  for me it was caused because on my Mac I have changed the DocumentRoot to my users Sites directory   To fix it  I ran the recursive command to ensure that the Apache service has read permissions   sudo chmod -R 755   Sites

User · Answer

Check dos and unix file format  This problem is seen on linux platforms if dos file format is used  Use doc2unix command like below and then retry it should work dos2unix   php  This solution for below problem  Wed Nov 12 07 50 19 2014   error   client IP1  PHP Warning  Unknown  failed to     open stream  Permission denied in Unknown on line 0  Wed Nov 12 07 50 19 2014   error   client IP1  PHP Fatal error  Unknown  Failed     opening required   var www html index php   include path     usr share pear       usr share php   in Unknown on line 0

User · Answer

I had the same error and my problem was the file permissions were incorrect   chmod 755 index php   worked for me

User · Answer

This isn t a direct answer to the question  but I had the same problem  I installed VSFTPD on my Ubuntu Server VPS  I could upload files  but every file I uploaded didn t have execution permissions  all files had rights  600    These posts explain explain exactly what you have to do to configure your VSFTPD to set default rights on your files    Default File Permissions Apache  var www  vsFTPd default uploaded file permissions on Ubuntu not working

User · Answer

This also happens  and is particularly confounding  if you forgot that you created a Windows symlink to a different directory  and that other directory doesn t have appropriate permissions

User · Answer

In my case the group  www that apache uses was missing in the folder s access list  so first I had to add the missing group  like so   sudo chown -R  www   path-to-folder   Change  www to whatever user or group that apache is running as   Find out apache s user group using apachectl -S  The output is huge  but look at the very end something like   User  name   www  Group  name   www

[php] PHP Warning: Unknown: failed to open stream

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