PHP系统返回127错误码

Question

I've tried to backup my database with the following php code on mac Sierra:

$command = "mysqldump --opt -u root -proot si_clinic_pos > clinic.sql";
system($command, $output);

if($output != 0) {
  echo $output;
}else {
  echo 'Database saved';
}

The output is "127", but if I tried to execute the "mysqldump --opt -u root -proot si_clinic_pos > clinic.sql" inside terminal, it's working fine.

what's wrong with it, could you please help me?

Answer 1

The solution to the problem is to specify the full path to the executable file you want to run.

So, in this specific case, instead of:

$command = "mysqldump ...";

you need to have:

$command = "/usr/bin/mysqldump ...";

Answer 2

/bin/sh 无法执行，退出状态将是执行 exit(127) 的命令。我建议您以 root 用户身份运行 PHP 程序。