On Mon, May 22, 2006 7:11 am, n.g. wrote:
> flock() with LOCK_NB not work under ,
> nor does fopen() with 'x' mode,
> my php is compiled as an apache module, and apache is running in
> prefork mpm.
> php version is 5.1.2
>
> my code is
>
> <?php
> $haslock=0;
> if($lock=fopen('LOCK','w')){
This would work ONLY if the directory containing your PHP script on
your website was world-writable.
*THAT* would be particularly *BAD*!!!
So you need to specify a php-writable (world-writable, in most cases)
directory for your 'LOCK' file to live in, with something like:
'/var/share/your_application_name/LOCK'
> if(flock($lock,LOCK_EX|LOCK_NB))$has_lock=1;
> }
>
> if($has_lock){
> //do something which should always be only one process
> }
> ?>
>
> or
>
> <?php
> $has_lock=0;
> $lock=fopen('LOCK','x');
> if($lock)$has_lock=1;
> if(has_lock){
> // do something
> }
>
> both of them wont work.
> however cli mode works well.
>
> any clue?
>
> TIA.
>
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