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Posted by Chung Leong on 05/10/07 21:14
On May 10, 7:00 pm, "Jon Slaughter" <Jon_Slaugh...@Hotmail.com> wrote:
> "Chung Leong" <chernyshev...@hotmail.com> wrote in message
>
> news:1178812844.248954.101410@y5g2000hsa.googlegroups.com...
>
>
>
>
>
> > On May 10, 4:29 pm, "Jon Slaughter" <Jon_Slaugh...@Hotmail.com> wrote:
> >> I'm using eval to excute some mixed php and html code but I cannot debug
> >> it.
> >> I am essentially using filegetcontents to load up a php/html file and
> >> then
> >> inserting it into another php/html file and then using eval to execute
> >> the
> >> final product.
>
> >> If I were to use include and output buffering instead of filegetcontents
> >> would it allow be to debug the code? (I have to capture the include so it
> >> can be modified which is why I used filegetcontents and eval in the first
> >> place).
>
> >> essentially instead of something like eval(mod(filegetcontents()))
>
> >> I would have
>
> >> ob_start();
> >> include $filename;
> >> $contents = mod(ob_get_contents());
> >> ob_end_clean();
>
> >> As far as I can remember mod only modifies html code but I can't be
> >> completely sure. In any case I'm not sure how the include eval the code
> >> when
> >> its buffered as if its just the output or what? Right now everythign is
> >> working fine and I don't want to screw it up but I'm kinda dragging my
> >> feet
> >> because of the debugging issues.
>
> >> Thanks,
> >> Jon
>
> > An alternative to using eval() is to implement a stream wrapper, then
> > using include/require on a custom URL. What I would do is save the
> > generated content to a temporary file during debug so that you can
> > more easily see where an error occur.
>
> > Seehttp://www.php.net/manual/en/ref.stream.php
>
> Ok, I'm not sure if I understand what you mean. Are you saying that I should
> read one php statement at a time and evaluate the php statements?
>
> That is, I might read the file into an object and then parse it one
> statement at a time and eval each statement. This way I could step through
> the code... not necessarily the best way but does let me debug my code.
>
> The problem is, that in my code I do something like
>
> eval('?>'.AddNavToPage($MainPage));
>
> Where $MainPage is just an html file that acts as a template(I probably
> could have included it aftwards instead of the way I did it but I think its
> probably to late to recode it at this point).
>
> So when I debug the code I get to this line and then cannot debug whats
> inside.
>
> What is inside is what AddNavToPage does, which is inserts a php/html file
> $mainpage into the template page to generate the total page.
>
> Essentially AddNavToPage returns a mixed php/html that was stiched together
> by 2 other pages.
>
> I suppose I could save it to a temp file like you mentioned and then include
> it and it should work?
>
> that is, instead of the eval line I could do
>
> if ($DEBUG)
> {
> file_put_contents($temp, AddNavToPage($MainPage)));
> include $temp;
>
> }
>
> (psuedo code)
>
> I'll try that and see what happens,
>
> Thanks,
> Jon- Hide quoted text -
>
> - Show quoted text -
No, what I mean is you define a stream wrapper, so you can access the
code generated by your procedure as though it's a file. The wrapper
would look something like this:
class AddNavStream {
var $data;
var $position;
function stream_open($path, $mode, $options, &$opened_path) {
// extract necessary info from $path
$url = parse_url($path);
// get the contents of the file
$file1 = file_get_contents( ... );
$file2 = file_get_contents( ... );
// do something here to generate the code
// to be executed...
if(defined('DEBUG')) {
// save contents to temp file
}
// contents of the pseudo file
$this->data = $code;
$this->position = 0;
return true;
}
function stream_read($count)
{
$ret = substr($this->data, $this->position, $count);
$this->position += strlen($ret);
return $ret;
}
// other handlers
}
You then call stream_wrapper_register() to register the wrapper:
stream_wrapper_register("addnav", "AddNavStream ");
After doing that you can then do an include like this:
include("addnav://nav.php/contents.php");
The wrapper handlers in the AddNavStream class will be called to
handle the request, with stream_open() being the first. The effect of
this will be like saving the code in a file first, then including it.
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