[php] Help with a parsing program

[brunoais]

hi,
I'd like to make a code in order to search for keywords in a huge text.

It works like this:
I prompt for a big text from the user.
the program must find the exact text:

title="Paliçada nível

then a number between 0 and 20.
after that there is a

"

Also, the text may not exist, if that happens it just ignores it.

where is "Paliçada" it may also be:
"Muralha" or
"muro de terra"
I'd like to make the same code but also to search for (instead of paliçada):

• Palácio

• Celeiro

• Praça de Torneios

for the last I'd like it to search for:

<td style="padding-top:4px;">

extract the number that comes next (it ends with a "/")

and then extract the number that comes next to the "/"
it ends with a:

</td>

___________________________________________________

In order to try to make this more easy to understand it's better to make an example:

in text there will be (between other text):

title="Paliçada nível 20"

the program will output:

20

or it there may also be:

title="Celeiro nível 7"

the program will output:

7

and there will be:

<td style="padding-top:4px;">5971/9000</td>

the program will output:

5971

and there will be an other output:

9000

I hope I made myself clear enough

Edit:

I have aldeady tryed using the coding like:
[0-9] , .^?
but I cannot fully understand it...
Edit:
Why noone is answering?

 

[leafypiggy]

No one is answering because they probably don't understand what you are asking. Please explain what you want more fully and comprehendly.

 

[mephis]

I believe he wants to parse HTML code to extract certain information in that code.
I would suggest using preg_match() or maybe a combination of strpos()/substr() to extract that information. If you want to use preg_match() then you better read up on regular expressions, although in your case I would say strpos()/substr() would be faster

 

[brunoais]

could you please help on that regular expressions so that I could find the text I need? I don't know why but I can't understand them.

After I know how to write the regular expressions to use I can make the rest of the code with ease

 

[tttony]

well you need regular expressions, you can lran more about this here:

http://www.addedbytes.com/cheat-sheets/regular-expressions-cheat-sheet-version-1/

http://www.addedbytes.com/cheat-sheets/regular-expressions-cheat-sheet/

I learnt so much with these tutorials

 

[t2t2t]

Here's something I quickly wrote:

function getNumbers($testfor) {
	preg_match_all('/[0-9]{1,}/', $testfor, $out);
	return $out[0]; // Returns array of numbers
}

However, for "<td style="padding-top:4px;">5971/9000</td>", it also matches 4 in padding-top:4px;

 

[brunoais]

so it seems like to find the number after
"title="Paliçada nível" is must be:

^title=\\"Paliçada nível[:space:]$^[0-9]$^\"$

And with preg_match_all()
the start sting will be:
title="Paliçada nível 12"
I'll get:
[1]title="Paliçada nível
[2]12
[3]"
in the variable, is this right?