phpmailer write debug inside log file - phpmailer

Question

I tried to create a new log file if there is a phpmailer error. But the file is not created. I check my directory (777).
Do you have an idea ?
Thank you
if (DEBUG_EMAIL == 'true'){
$this->phpMail->SMTPDebug = $this->debug_level; //2
$this->phpMail->Debugoutput = function($str, $level) {
$filename = CLICSHOPPING::BASE_DIR . 'Work/Log/phpmail_error-' . date('Ymd') . '.log';
$data = date('Y-m-d H:i:s') . "\t" . "\t$level\t$str\n";
$flags = FILE_APPEND | LOCK_EX;
file_put_contents($filename, $data, $flags);
};
// $this->phpMail->SMTPDebug = SMTP::DEBUG_SERVER;
}

Answer 1

Double check all your values, don't assume they are what you think they are. For example what is in CLICSHOPPING::BASE_DIR? Also, it's usual for directory env vars to not have a trailing slash, so you may be missing one when you append Work/... to it. Try this:
$filename = CLICSHOPPING::BASE_DIR . '/Work/Log/phpmail_error-' . date('Ymd') . '.log';
$data = date('Y-m-d H:i:s') . "\t" . "\t$level\t$str\n";