What is Canonical's LTS support policy for EOL software?

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http://askubuntu.com – I'm using PHP 5.3 and need to remain on PHP 5.3 for the foreseeable future. Please don't suggest upgrading -- for my setup, it's simply not possible at this stage. I'm currently evaluating which OS to choose for my new server. I'd prefer to use Debian Wheezy (on which I'd leverage apt's pinning system to pull PHP 5.3 packages from Squeeze), but the latest Ubuntu LTS includes PHP 5.3 and is supported until 2017. Here's what I'm wondering: PHP 5.3 goes EOL in less than a year. When it's abandoned, will Canonical abandon it as well, or will they backport security fixes from PHP 5.4+ (where appl (HowTos)