Using Demo in the Wiki Causes All My PHP/Mapscript Examples to Die

[Bill Thoen]

Going back through my notes on how I installed PHP and mapscript I 
quoted you in my notes:
> "Well, by downloading and using the PHP source of the same version as 
> what is installed on your machine the build worked fine, but there is 
> a small possibility that you may still encounter intermittent crashes 
> at runtime because the PHP headers are customized to match your build 
> options by PHP's configure, and you didn't use the headers that match 
> exactly your PHP build options. Options such as the version of REGEX 
> or GD used by PHP have an impact on MapScript."
I guess this is what you meant...
I think I need to re-examine this install.

Daniel Morissette wrote:
> Are you using PHP as an Apache module or as a CGI?
> If using PHP as a module then what you got could be the symptoms of a 
> memory trashing problem which over time corrupts/kills all Apache 
> child processes.
>
> The easy workaround would be to switch to using PHP as a CGI, this way 
> every request gets a new fresh process to work with and you avoid the 
> problem.
>
> However if possible we should try to identify the source of the 
> problem, and if it's a bug in MapServer then try to fix it.
>
> First, the usual suspects: GD... if your PHP has GD enabled, then is 
> it using the same copy of GD as PHP MapScript? If PHP uses its bundled 
> GD that could be a problem because MapScript likely uses the system GD 
> and you have two different versions of GD used in the same process. 
> It's important that both PHP and MapServer/MapScript use the system GD.
>
> If you are convinced that conflicting GD versions is not the cause of 
> the problems then I'd suggest that you try again with MapServer 5.0. 
> If you can reproduce the bug with 5.0 then please file a ticket in 
> Trac with as much detail as you can, including a script + mapfile to 
> reproduce.
>
> Daniel
>
>
> Bill Thoen wrote:
>> I've been experimenting with PHP/mapscript and came across an example 
>> of how to display points dynamically (it's in the wiki at 
>> http://mapserver.gis.umn.edu/cgi-bin/wiki.pl?PHPMapScriptAddPoint), 
>> and so I wanted to try it.
>>
>> It seems to work for several points in a row (basically moving a 
>> single point to the next place I click) but after about 10 clicks or 
>> so, the application dies with a loadLayer() error (which causes a 
>> cascade of subsequent errors.) Worse, I discover that when this 
>> happens NONE of my other PHP/mapscript applications will work, even 
>> though they've been working fine and use other data sources and map 
>> files. I have to reboot my machine to get them to work again.
>>
>> I've added a call to $pt->free() following the line with $pt->draw() 
>> in it and fixed the parameter list in click2map() to include the 
>> $map->extent, but that doesn't seem to cure it.
>>
>> I'm using MapServer 4.10.0 and I think mapscript 4.8, and this is all 
>> running on Fedora Core 5 Linux machine.
>>
>> Does anyone have any idea what's happening and how I can correct it?
>>
>> TIA,
>> - Bill Thoen
>
>