List installed php packages with:
$> dpkg -l | grep php| awk '{print $2}' |tr "\n" " "
and then remove unneeded packages with sudo aptitude purge your_packages_here or if you want to directly remove them all use :
$> sudo apt-get purge `dpkg -l | grep php| awk '{print $2}' |tr "\n" " "`
$> sudo add-apt-repository ppa:ondrej/php
If you get add-apt-repository: command not found run the following command first :
sudo apt-get install software-properties-common
- Install your PHP Version
$> sudo apt-get update
$> sudo apt-get install php5.6
You can install php5.6 modules too for example
sudo apt-get install php5.6-mbstring php5.6-mcrypt php5.6-mysql php5.6-xml
- Verify your version: if you have installed php5.6-cli
sudo php -v
- If you don't have php5.6-cli, put this on a .php file
<?php
//outputs php configuration info
phpinfo();
?>