Using Dotdeb is very simple.

1. First add these two lines to your /etc/apt/sources.list file:

deb http://packages.dotdeb.org squeeze-php54 all
deb-src http://packages.dotdeb.org squeeze-php54 all

2. Now fetch the appropriate GnuPG key:

wget http://www.dotdeb.org/dotdeb.gpg
cat dotdeb.gpg | sudo apt-key add -

3.Install PHP 5.4: Continue Reading…

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