How Can I Define and Use Array Constants in PHP?

PHP Constant Arrays: Addressing the Limitation

In PHP, constants serve as placeholders for fixed values. However, assigning arrays to constants has proven to be a challenge.

Missed Attempt with define()

Your initial attempt using define() failed because prior to PHP 7, constants were not permitted to contain arrays.

Workarounds Before PHP 7

To overcome this limitation, you resorted to storing the array as a string and later converting it back to an array. While this method achieved the desired outcome, it introduced unnecessary complexity and effort.

Solution with PHP 7 and Later

Fortunately, PHP 7 introduced a solution for defining array constants. With the introduction of const, you can now declare an array constant in the following manner:

const DEFAULT_ROLES = array('guy', 'development team');

This provides a concise and clear way to define a constant holding an array.

Compatibility with PHP 5.6 and Earlier

If you are working with PHP 5.6 or an earlier version, the original approach of storing the array as a string and then converting it back remains the best workaround.

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