How to continue to command by PHP if error occurs in first command

Question

I want to execute several commands by PHP,

//DISPLAY setting
$command1 = 'export DISPLAY=:1';    
$last_line1 = system($command , $rtn);

//use Xvfb
$command2 = 'Xvfb :1 -screen 0 '.$width.'x'.$height.'x24 &';
$last_line2 = system($command , $rtn);

//open firefox
$command3 = 'firefox -display :1 -width '.$width.' -height '.$height.' -P "webshot" &';
$last_line3 = system($command , $rtn);

//open URL
$command4 = 'firefox -display :1 -remote "openurl('http://www.google.com')" &';
$last_line4 = system($command , $rtn);

command3 occurs some errors ,but they can ignore. I want to continue to execute command4,but command3 occurs some errors,so it cannot be executed.

How to resolve this problem?

What kind of error? It should be continuing, a failed `system` call does not typically end execution. — deceze, Apr 26 '12 at 07:11
@Alon Virtually *no* PHP *function* throws Exceptions. The newer OOP oriented classes often do, and if so it's clearly documented. — deceze, Apr 26 '12 at 07:17

score 1 · Accepted Answer · answered Apr 26 '12 at 07:10

1

Define error_reporting(0) at the top of the page.. Though it s not a good programming practice, it s the solution for ur problem

answered Apr 26 '12 at 07:10

Edwin Alex

5,118
4
28
50

score 0 · Answer 2 · answered Apr 26 '12 at 07:33

0

I think, you should use a try catch in order to catch exception related to your system command

answered Apr 26 '12 at 07:33

Userbn

342
1
2

How to continue to command by PHP if error occurs in first command

2 Answers2