Failed to open stream on file_put_contents in PHP on CentOS 7

Question

I know this is a common bug with many threads but I\'m tired of searching and I still haven\'t solved it. When I try to run the function file_put_contents I get

Answer 1

Ok, I found the issue: selinux

Here's the solution: http://kb.sp.parallels.com/en/11142

In case the page goes down:

Symptoms

After you change the default directory to store website content (say, to "/home"), you are unable to access the content of subdomains and additional websites over the Web.

Cause

This problem occurs if SELinux works in "Enforcement" mode. In this mode, webroot directories for websites and subdomains inside them have different permissions, and your web server fails to access them. Run this command:

# getenforce

The output should be: Enforcing

Resolution

Disable SELinux support: Open the file /etc/selinux/config in any editor and find this row:

SELINUX=

Change it to:

SELINUX=disabled

If you cannot find this file, open the file /boot/grub/grub.conf in any editor and add the parameter selinux=0 to the Grub Boot Loader:

title SE-Linux Test System
root (hd0,0)
kernel /boot/vmlinuz-2.4.20-selinux-XXXXXXXXXX ro root=/dev/hda1 nousb selinux=0
#initrd /boot/initrd-2.4.20-selinux-XXXXXXXXXX.img

Reboot the server to apply the changes. If you do not want to reboot, run this command:

# setenforce 0