wtf!

bla.php

        # log / debug
        $filename = $this->api_json . 'debug.txt';
        $fp = fopen($filename, 'w');
        fwrite($fp, "\n\n------- スタート " . $debug['date_start'] . " ----------\n\n");
        //fwrite($fp, print_r($result, true));
        fwrite($fp, "\n\n------- 終わり " . $debug['date_end'] . " ----------\n\n");
        fclose($fp);

        echo "end\n";