[UPHPU] PHP parser

[Aaron Luman]

As a matter of introduction I should say that I struggle with PHP.  I  
do most of my web work in PHP, but probably not how I should be doing  
it, haha.  Anyway, I'm trying to learn better practices as well as how  
to use pre-made scripts and tools.

My current struggle with PHP is that i am trying to figure out a  
simple way to parse an html file.  My hope is that I will be able to  
copy the source and then submit it via a form using post.  I found two  
pre-made scripts that looked promising, but I am not sure how good of  
an option they are.

The first - http://sourceforge.net/projects/simplehtmldom/  - looked  
good but then when I tried using it with the entire file it returned  
memory usage errors while testing on my local machine.

The second - http://php-html.sourceforge.net/ - works without error,  
but takes nearly a minute to parse the full file (nearly 5 MB of text)

I am concerned that when I get my code working and posted to my host  
that they will freak out about the heavy workload imposed by parsing  
the large files.

The end result of parsing the source is that I would like to be able  
to find particular values so that they can be filtered out along with  
their markup (a table of between 1500 and 2000 characters) and  
reposted in a final, results page, which should be fairly easy once I  
get the parsing concerns worked out.

Should I be worried about the memory/processor draw while using these  
(or similar) parses?  Do any of you have experience with another  
parsing tool that is more efficient?  Is there a better way to go  
about doing this?

Thanks in advance for any help that you might be able to offer.

Aaron