CODEWITHSUNDEEP
php
Rebol Tutorial
Rebol Tutorial

Reputation: 2754

PHP system function strange behavior

I have a strange behavior with PHP system function. In this php script there are only 2 instructions (the rest being pure html):

<?php echo system('cgi-bin/gallery2/galleryheaderview.cgi'); ?>
<?php echo system('cgi-bin/gallery2/galleryview.cgi'); ?>

The first cgi just returns a single line as you can check here http://reboltutorial.com/cgi-bin/gallery2/galleryheaderview.cgi

It returns

My Gallery

But the whole php script returns My Gallery Twice:

My Gallery My Gallery

http://reboltutorial.com/gallery2.php

Is there a reason (I don't use My Gallery in second cgi script of course see http://reboltutorial.com/cgi-bin/gallery2/galleryview.cgi) and how to prevent this ?

Thanks.

Upvotes: 0

Views: 129

Answers (2)

DaMacc
DaMacc

Reputation: 701

Are you absolutely sure that nothing else is outputting the My Gallery before this line? You should try removing it, and see if it goes completely away or if there is still is one "My Gallery"

<?php echo system('cgi-bin/gallery2/galleryheaderview.cgi'); ?>

If this doesn't bring you any further, maybe you have included some php file twice?

Upvotes: 1

Alana Storm
Alana Storm

Reputation: 166066

Update: The system function will do two things. The first is, it will run a command and pass its output through to the browser and/or output buffer. The second is, it will return the last line of output. So when you're saying

echo system('/...');

You're saying "Hey system, output the results of this command" and then "Hey ehco, output whatever system returns". Removing the echo 

system('/...');

will fix your problem.

A few other things to check

  1. Are you sure its galleryheaderview.cgi that's returning things twice? Comment out the include to make sure its actually the script that's echoing My Gallery twice

  2. Is your PHP page/program included/constructed in such a way that galleryheaderview.cgi is being called twice?

  3. Are you sure that calling the URL http://reboltutorial.com/cgi-bin/gallery2/galleryheaderview.cgi is calling the same command line as cgi-bin/gallery2/galleryheaderview.cgi?

If you've checked out the three items above, you'll need to drop into the source of galleryheaderview.cgi and see why its outputting the header twice.

Upvotes: 4

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