Passing argument to perl from command line

[dooley28]

Hey all,

I'm trying to execute a perl script from php and I want to pass a string via command line.

However it's not liking my syntax which im sure is wrong.

I execute the perl script from php like this.
$stringvariable="This is a string";
exec('perl script.pl $stringvariable',$result);

And in my perl file
$survey=$ARGV[$0];
echo $survey;

Which moans and says
Use of uninitialized value in array element at script.pl line 4.

Hope someone can help.

Thanks!

 

[travs69]

$ARGV[0]

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Travis - Those who say it cannot be done are usually interrupted by someone else doing it; Give the wrong symptoms, get the wrong solutions;

 

[dooley28]

Ah thanks for the reply.
I was focusing on the fact that it the input has spaces might be causing a problem, I missed the $0 completely.
To solve that I wrote the above I wrote.

$numArgs = $#ARGV + 1;
print "thanks, you gave me $numArgs command-line arguments.\n";
$input=NULL;
foreach $argnum (0 .. $#ARGV)
{
if($input eq NULL){
$input="$ARGV[$argnum]";
}else{
$input="$input $ARGV[$argnum]";}
}

Thanks for the help!

 

[travs69]

if you just trying to get a space seperated variable of your input you might look into using join


$blah = join(' ', @ARGV);

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Travis - Those who say it cannot be done are usually interrupted by someone else doing it; Give the wrong symptoms, get the wrong solutions;

 

[KevinADC]

I don't know PHP but maybe the argument can just be quoted if the spaces present a problem, something like:

exec(' perl script.pl "$stringvariable" ',$result);

------------------------------------------
- Kevin, perl coder unexceptional!

 

[dooley28]

Cheers that join worked perfectly Travs.

I gave putting the arguments into quotes a try but no luck, wouldn't work....

 

[dooley28]

No wait actually quote and $ARGV[0] worked grand. Thanks folks!

 

[PaulTEG]

Have a look for the GetOpt modules on CPAN if you're looking to pass switches and the like ...

Paul
------------------------------------
Spend an hour a week on CPAN, helps cure all known programming ailments ;-)

 

[travs69]

GetOpt is cool for switches and stuff..

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Travis - Those who say it cannot be done are usually interrupted by someone else doing it; Give the wrong symptoms, get the wrong solutions;

 

[dooley28]

GetOpt does actually seem pretty cool, something I would definitely use in the future but way more than I need its just a simple string I needed passed.

 

[PaulTEG]

... hence the qualifier on the statement ;-)

Paul
------------------------------------
Spend an hour a week on CPAN, helps cure all known programming ailments ;-)

 

[travs69]

Nothing like validating your validation

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Travis - Those who say it cannot be done are usually interrupted by someone else doing it; Give the wrong symptoms, get the wrong solutions;