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<!DOCTYPE html> <html lang="en"> <head> <meta charset="utf-8"> <title>Reducing an Empty Array in PHP</title> </head> <body> <pre> <?php // Defining a callback function function sum($carry, $item){ $carry += $item; return $carry; } // Sample array $empty = array(); var_dump(array_reduce($empty, "sum", "No data to reduce")); // string(17) ?> </pre> </body> </html>
