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<?php class Products { public static function sortByPriceAscending($jsonString) { $info = json_decode($jsonString, true); usort($array, "cmp"); print_r($info); } public function cmp($a, $b) { return strcmp($a["price"], $b["price"]); } } // For testing purposes (do not submit uncommented) echo Products::sortByPriceAscending('[{"name":"eggs","price":1},{"name":"coffee","price":9.99},{"name":"rice","price":4.04}]');
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: usort(): Argument #1 ($array) must be of type array, null given in /in/41VT5:7 Stack trace: #0 /in/41VT5(7): usort(NULL, 'cmp') #1 /in/41VT5(22): Products::sortByPriceAscending('[{"name":"eggs"...') #2 {main} thrown in /in/41VT5 on line 7
Process exited with code 255.

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