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Upgrade PHP on Server with IUS Repository

By on January 17, 2013 in PHP

It’s easy to upgrade between PHP version is you’re using the IUS repository:

http://iuscommunity.org

Start by determining which version and modules you have already installed:

So in this case we have the “php52” packages.

Next decide which package set you want to upgrade to. Right no in IUS the choices are:

  1. php52
  2. php53u
  3. php54

IUS provides a great extension for yum which allows for replacing packages:

Now you can replace the PHP version with something like this:

Just change php52 and php53 to the original and new version that you want to replace.

After the install completes run “yum list | grep php | grep installed” again and make sure that you have all the extensions that you need.

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Block PHP Execution With .htaccess In Folder

By on January 5, 2013 in Apache, PHP, Plesk

For a server using Plesk add the following lines to a .htaccess file to stop execution of PHP scripts in the folder:

I like to use this to protect cache and image upload folders that are writable by the web server but should not be able to execute code.

As a further precaution, chown the .htaccess to root, so it can’t be overwritten by Apache or FTP, and “chattr +i” to be sure about it.

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Bash Loops

By on November 3, 2012 in Bash Scripting

Here’s a basic loop in Bash:

Notice that it iterates over a space delimited string of values.

If you have a comma delimited list then you can do something like this:

IFS is the “internal field separator” which defaults to a blank space. We save the original IFS and change it to a comma. Then once we’re done we restore the original IFS.

Here are some links to additional examples:

http://www.cyberciti.biz/faq/bash-for-loop/

http://tldp.org/HOWTO/Bash-Prog-Intro-HOWTO-7.html

http://www.thegeekstuff.com/2011/07/bash-for-loop-examples/

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PHP Parse error: syntax error, unexpected $end

By on October 24, 2012 in PHP

There are two common causes to this error:

1. You have an actual syntax error in you code that needs to be fixed.

2. Your code is expecting the PHP “short_open_tags” setting to be turned on and it is not.

This second case is common when you’re moving a site between servers – the old server has short_open_tags turned on and the code works but the new site has it turned off and the code breaks.

The solution to the second case is to either (a) modify the code to remove the dependency on short_open_tags or (b) turn on short_open_tags in php.ini or your .htaccess file.

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Install PHP SSH2 extension on RHEL 5.6 with EPEL repository

By on May 10, 2012 in Apache, PHP

Here are the steps to install the PHP SSH2 extention on RHEL 5.6 with the EPEL repository.

  1. Install packages that may be needed:
  2. Temporarily allow binary execution in /tmp
  3. Install the extension:
  4. Restore /tmp restrictions:
  5. Reload apache:
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