PHPMailer::parseSendmailPath( string $sendmailPath ): string

998    private function parseSendmailPath($sendmailPath)999    {1000        $sendmailPath = trim((string)$sendmailPath);1001        if ($sendmailPath === '') {1002            return $sendmailPath;1003        }1004 1005        $parts = preg_split('/\s+/', $sendmailPath);1006        if (empty($parts)) {1007            return $sendmailPath;1008        }1009 1010        $command = array_shift($parts);1011        $remainder = [];1012 1013        // Parse only -t, -i, -oi and -f parameters.1014        for ($i = 0; $i < count($parts); ++$i) {1015            $part = $parts[$i];1016            if (preg_match('/^-(i|oi|t)$/', $part, $matches)) {1017                continue;1018            }1019            if (preg_match('/^-f(.*)$/', $part, $matches)) {1020                $address = $matches[1];1021                if ($address === '' && isset($parts[$i + 1]) && strpos($parts[$i + 1], '-') !== 0) {1022                    $address = $parts[++$i];1023                }1024                $this->Sender = $address;1025                continue;1026            }1027 1028            $remainder[] = $part;1029        }1030 1031        // The params that are not parsed are added back to the command.1032        if (!empty($remainder)) {1033            $command .= ' ' . implode(' ', $remainder);1034        }1035 1036        return $command;1037    }