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<?php $array = array(1, "apples",2, "oranges",3, "plums"); $callback = function($item) { return strtoupper($item); }; $nu = array_map( "strtoupper", $filtered); var_dump($nu); ?>
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $filtered in /in/S93jJ on line 9 Fatal error: Uncaught TypeError: array_map(): Argument #2 ($array) must be of type array, null given in /in/S93jJ:9 Stack trace: #0 /in/S93jJ(9): array_map('strtoupper', NULL) #1 {main} thrown in /in/S93jJ on line 9
Process exited with code 255.

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