我正在使用centos服务器而且我必须以tbz格式从不同的服务器下载数据到centos服务器,然后我必须提取它并在完成提取后我必须将数据从它导入到mysql数据库表
我正在做的是 从服务器获取大小约为700MB的数据,但是当我执行命令来提取数据时,其他任何事情都没有发生。$files = array('20111101.tbz', '20111101.tbz.md5' ,'20111102.tbz' ,'20111102.tbz.md5') ;
//folder names of the folders formed
$folder1 = "20111101";
$folder3 = "20111102";
//command to extract all the downloaded .tbz files
$command1 = "cd /var/www/html/mywork1/mywork2/mywork3/";
exec($command1." 2>&1", $output);
$command2 = "tar -xjf ".$files[0];
exec($command2." 2>&1", $output);
$command4 = "tar -xjf ".$files[2];
exec($command4." 2>&1", $output);
//command to populate the data into the database
$command6 = "cd /var/www/html/mywork1/mywork2/mywork3/mywork4";
exec($command6." 2>&1", $output);
$command7 = "./runit.py /var/www/html/mywork1/mywork2/mywork3/$folder1";
exec($command7." 2>&1", $output);
$command9 = "./runit.py /var/www/html/mywork1/mywork2/mywork3/$folder3";
exec($command9." 2>&1", $output);
//command to remove the folders created after population of data
$command10 = "rm -rf $folder1";
exec($command10." 2>&1", $output);
$command11 = "rm -rf $folder3";
exec($command11." 2>&1", $output);
foreach ($files as $file)
{
//command to remove all .tbz files downloaded.
$command12 = "rm -rf $file";
exec($command12." 2>&1", $output);
}
我只是执行命令,但它没有做任何事情。但是当我在服务器上手动尝试所有这些命令时,它们工作正常。任何人都可以指导我吗?这样做的正确方法应该是什么?
答案 0 :(得分:1)
你不能exec("cd /some/dir");
,因为这会启动一个shell,它会转到这个目录,然后退出。对于你的PHP程序,它什么都不做 - 工作目录不会改变。
您需要chdir('/some/dir') or die("Cannot change directory");
。