从命令行和浏览器（Apache2）输出不同的php exec（）

from command line:

sudo -u apache php -r 'exec("rsync -avi --rsh=\"ssh -o StrictHostKeyChecking=no -p22\" --omit-dir-times /var/www/html/ test@out:/var/www/html/ 2>&1", $a, $n);print_r($a);';

returns this (and I want such output):

 Array
(
    [0] => sending incremental file list
    [1] => <f+++++++++ testrsync
    [2] =>
    [3] => sent 9143 bytes  received 47 bytes  18380.00 bytes/sec
    [4] => total size is 25642011  speedup is 2790.21
)

but from Apache2:

exec("rsync -avi --rsh=\"ssh -o StrictHostKeyChecking=no -p22\" --omit-dir-times /var/www/html/ test@out:/var/www/html/ 2>&1", $a, $n);
print_r($a);

I get this output:

array (
  0 => 'sending incremental file list',
  1 => ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' ' '',
  312 => 'sent 139318 bytes  received 183398 bytes  215144.00 bytes/sec',
  313 => 'total size is 25642011  speedup is 79.46',
)

Before testing I delete testrsync file and both from terminal and from browser rsync successfully transfers testrsync file but in apache2 it does not show this line:

<f+++++++++ testrsync

I want to get list of modified files by Rsync in the browser.

Apache/2.2.15, PHP 5.4.20, Centos 6.4