Ace the Zend Certified PHP Engineer Challenge 2025 – Power Up Your PHP Skills!

Question: 1 / 400

Which of the following is NOT a predefined constant in PHP?

__DIR__

__BASE__

The correct answer is that __BASE__ is not a predefined constant in PHP. Predefined constants are constants that PHP automatically makes available to all scripts without needing to define them first.

The constants __DIR__, __FILE__, and __LINE__ are commonly used in PHP programming. __DIR__ returns the directory of the current script, __FILE__ returns the full path and filename of the current script, and __LINE__ returns the current line number in the script. These constants are important for debugging and managing file paths dynamically.

On the other hand, __BASE__ does not exist in PHP. This usage might stem from confusion with other frameworks or contexts where similar naming conventions are practiced, but PHP itself offers no predefined constant called __BASE__. Understanding which constants are predefined is essential for effective coding and troubleshooting in PHP.

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__FILE__

__LINE__

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