Getting details about your current installed version of php

The best way to get information like installed php version is to use the phpinfo()  function.

To use the phpinfo()  function go to your document root ( /srv/www/htdocs/ )  write a new file, name it phpinfo.php ( or whatever you like ) and write the folowing inside:

phpinfo();

?>

now go to your browser and access the page:  http://yourserver/phpinfo.php

you should now see detailed information about the version of php you have instaled and other valuable information like the comand used to configure php:

ex:

'../configure' '--prefix=/usr' '--datadir=/usr/share/php5' '--mandir=/usr/share/man' '--bindir=/usr/bin' '--with-libdir=lib' '--includedir=/usr/include' '--sysconfdir=/etc/php5/apache2' '--with-config-file-path=/etc/php5/apache2' '--with-config-file-scan-dir=/etc/php5/conf.d' '--enable-libxml' '--enable-session' '--with-mm' '--with-pcre-regex=/usr' '--enable-xml' '--enable-simplexml' '--enable-spl' '--enable-filter' '--disable-debug' '--enable-inline-optimization' '--disable-rpath' '--disable-static' '--enable-shared' '--program-suffix=5' '--with-pic' '--with-gnu-ld' '--with-system-tzdata=/usr/share/zoneinfo' '--with-apxs2=/usr/sbin/apxs2' '--disable-all' '--disable-cli'