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Pro Frameworks support
Supports Symfony1, Symfony2,Yii2 & Zend frameworks.
Pro Multiple revision control system integration
Has built-in support for the most popular revision control systems
Pro Free, open source, and cross-platform
NetBeans is a free, GPL-licensed IDE. It can run on any computer with a Java virtual machine. If a computer has a Java virtual machine (JVM), Netbeans can run on it. Netbeans can, therefore, run on a variety of operating systems such as Windows, *nix, and Mac OS. Being open source means that developers can contribute changes to the code to have the IDE better serve them.
Pro FTP/SFTP synchronization
Supports synchronization with projects stored remotely through FTP or SFTP.
Pro PHPUnit support
PHPUnit is a testing framework. You can create test classes, run and see the code coverage directly from IDE interface.
Pro Composer commands inside IDE
The most used composer commands can be done directly from IDE.
Pro Supports community plugins
NetBeans can be extended beyond the basic tool that you get out of the box through community made custom plugins.
Pro Linux terminal inside IDE
You can run Linux terminal inside the IDE.
Pro ApiGen support
ApiGen allows automatically generating documentation from specifically formatted comments. It's easy to use, supports traits, allows fuzzy searching for classes and highlighting docblocks using Markdown.
Pro Supports Twig templates
NetBeans provides code completion and documentation for all Twig elements.
Pro Best for PHP, HTML5 Apps Developemt
Pro Accelerated HTML5 development support
Pro Less and Sass Compiler support
Pro Bower support
Pro Supports Smarty
Supports Smarty Template Engine right out of the box.
Pro You can access source code history
There's a built-in local history that lets you compare code changes and revert to a specific revision. Helpful when source code file accidentally overwritten.
Pro ApiGen and PHPDoc support
Supports documentation generation through ApiGen and PHPDoc.
Pro Powerful debugging and performance optimization
Netbeans not only debugs your code, and points out errors but also gives you hints on which sections of your code could be further optimized.
Pro JMeter benchmarking tool support
Con Tries to do everything for you and gets it wrong too many times
Con Slows down occasionally
The Netbeans IDE is known to take a large memory as compared to other lighter IDE's available on the market. Slowdowns can decrease productivity and cause frustration.
Con Development has stalled dramatically
It went down from two releases a year with minor bug-fix releases to one release and no fixes. There seem to be fewer features added per release as well. There is no activity in the plugin community.