How can PHP developers efficiently include multiple files in their projects while maintaining code efficiency?

PHP developers can efficiently include multiple files in their projects by using the `require_once` or `include_once` functions. These functions ensure that files are included only once, preventing duplication and potential conflicts. By organizing files into separate modules or classes, developers can maintain code efficiency and improve readability. 

// Include multiple files efficiently
require_once 'file1.php';
require_once 'file2.php';
require_once 'file3.php';

Keywords

include require autoload namespaces code efficiency

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