php exec() error values
I have two subsequent exec commands. The first executes without issue the second however is throwing an error:
exec('/usr/bin/pdftk A='. trim($original) .' cat A1 output '. trim($onepage), $output, $error);
var_dump($output); var_dump($error);
exec('/usr/bin/pdftk '. trim($onepage) .' background watermark.pdf output '. trim($modified), $output, $error);
var_dump($output); var_dump($error);
The first produces:
array(0) { } int(0)
The second:
array(0) { } int(1)
The permissions on the php script and directories are exactly the same. I've tried ecaping the exec command using escapeshellargs with no luck either.开发者_开发百科
I'm not sure what your error is, but I would recommend that you reduce some of the background noise so that you can see the problem easier. What I mean by this is the following...
Take
exec('/usr/bin/pdftk A='. trim($original) .' cat A1 output '. trim($onepage), $output, $error);
var_dump($output); var_dump($error);
exec('/usr/bin/pdftk '. trim($onepage) .' background watermark.pdf output '. trim($modified), $output, $error);
var_dump($output); var_dump($error);
And do
$command1 = '/usr/bin/pdftk A='. trim($original) .' cat A1 output '. trim($onepage);
$command2 = '/usr/bin/pdftk '. trim($onepage) .' background watermark.pdf output '. trim($modified);
exec($command1, $output, $error);
var_dump($output); var_dump($error);
echo $command1;
exec($command2, $output, $error);
var_dump($output); var_dump($error);
echo $command2;
That way you can cut and paste the output of the command issued onto the unix command line, and perhaps get a better view of what is going on at the unix level.
What ended up working was the following:
$descriptorspec = array(
0 => array("pipe", "r"),
1 => array("pipe", "w"));
proc_open('/usr/bin/pdftk '. trim($onepage) .' background watermark.pdf output '. trim($modified), $descriptorspec, $pipes);
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