How to add PHP in netbeans on Ubuntu?

Go to Tools->Plugins

On the Installed tab check PHP and click on Activate. Restart NetBeans.

Note: I assume you have downloaded the appropriate package containing PHP tools.

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On 7.0.1 go to Tools->Plugins

click the Settings tab and Activate the Update Centers.

Now click the Available Plugins tab and you should see PHP

Install and Reboot Netbeans.

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On 8.1, same as above for 7.0.1 but some more precision : on the Settings tab you need to tick the NetBeans Distribution checkbox to see PHP in the Available Plugins list.

Activate the Update Centers. = click update tab > click Update button. now the Available Plugins will refresh then click on Available Plugins tab scroll down you will see php check it and click Install button