DEbian squeeze upgrade PHP 5.3 to PHP 5.5 -

On Debian (squeeze), I have to upgrade from PHP 5.3 to PHP 5.5.

I tried those commands: updated apt-update; Apt-get install php5;

Also adding:

  resonance "deb http://packages.dotdeb.org all squeezed" & gt; & Gt; /etc/apt/sources.list Echo "deb-src http://packages.dotdeb.org All Squeeze" & gt; & Gt; /etc/apt/sources.list  

But nothing changes, it is still PHP 5.3. any idea ? Thanks

I do not think that PHP 5.5 is for Debian 6 Squeeze in DotDeb. The latest version that I can see is 5.4.

They only have PHP 5.5 for Debian 7 VG.