PHP 5.4, released on March 1, 2012, is the first major update to PHP in nearly 3 years after v. 5.3 was launched in June 2009. While the much-anticipated full Unicode support has once again been kept on hold, v. 5.4 includes several changes that optimize runtime, remove deprecated features, and make code a little more graceful. As with every major new release, it’s important for every PHP developer to get up to speed on these new features.

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