Notatki PHP

 
/**
     * Method that transforms nested array into the flat one in below showed way:
     * [
     *      [
     *          [0]=>'today',
     *      ],
     *      [
     *          [0]=>'is',
     *          [1]=>'very',
     *          [2]=>   [
     *                      [0]=>'warm'
     *                  ],
     *      ],
     * ]
     *
     * Into:
     *
     * ['today','is','very','warm']
     *
     * @param $input
     * @return array
     */
 
    private function transformNestedArrayToFlatArray($input)
    {
        $output_array = [];
        if (is_array($input)) {
            foreach ($input as $value) {
                if (is_array($value)) {
                    $output_array = array_merge($output_array, $this->transformNestedArrayToFlatArray($value));
                } else {
                    array_push($output_array, $value);
                }
            }
        } else {
            array_push($output_array, $input);
        }
 
        return $output_array;
    }