Shawn McKenzie wrote:
> PJ wrote:
>
>> This really needs some explanation
>> I found this on the web:
>> <?php echo `whoami`; ?>
>> with it there was the comment "the direction of those single-quotes matters"
>> (WHY ?)
>> and it works....
>>
>> But this (_*FROM THE PHP MANUAL***_ * - exec()* executes the given
>> /command/ ) does not,
>> COPIED AND PASTED:
>> |<?php
>> // outputs the username that owns the running php/httpd process
>> // (on a system with the "whoami" executable in the path)
>> echo exec('whoami');
>> ?> |
>> What is going on here?
>> And I often find such discrepancies in examples - and some wonder why I
>> seem to be so stupid... and don't know the fundamentals... :-\
>>
>
> Others have shown how exec() returns the output. If you use
> shell_exec() it's the same as using the backticks:
>
> <?php echo `whoami`; ?>
>
> -or-
>
> <?php echo shell_exec("whoami"); ?>
>
> You can use single quotes here also, i used double so you can easily
> tell they are not backticks
>
What is not clear to me is why would I need to use a shell? What kind of
situations call for it's use?
--
Phil Jourdan --- pj@xxxxxxxxxxxxx
http://www.ptahhotep.com
http://www.chiccantine.com
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