Regex is not working with file_get_contents

Question

I have a problem about regex and I come here to ask you for help.

I’m trying to get a file value .chr by regex, but it does not return any match, I find it strange because I have tested in regex engines online and gave match.

 $conteudo = file_get_contents($chart);

 preg_match('/valorLoteIni=./', $conteudo, $matches);

 var_dump($matches); exit;

In case I’m trying to get the value of valueLoteIni

As I said before, I have already tested on websites, and the result was the following:

As you can see, the regex is working.

I hope you help me, thank you and even more.

EDIT.

For those who want to test I will post the file: https://drive.google.com/file/d/1SuOd6ZvBz1xxNculHgy-eN2-coOBQW3a/view?usp=sharing

Answer 1

The archive .chr has a type of encoding that adds "spaces" between characters when read by file_get_contents(). See how it is returned in the browser:

But these spaces are not common spaces, they are spaces of some kind of code that is interpreted by the browser as a space. Therefore, it would be useless to put spaces in the regex, because it would not recognize them.

In this case, you can capture the pattern by adding a point . between each letter of the string sought, because the point in the regular expression represents any character. Therefore, no matter which character is that of the spaces, the pattern will marry.

That is, exchange the pattern for this:

'/v.a.l.o.r.L.o.t.e.I.n.i.=.{2}/'

Staying:

preg_match('/v.a.l.o.r.L.o.t.e.I.n.i.=.{2}/', $conteudo, $matches);

I added the {2} so that the last point matches at least 2 characters after the =.

Answer 2

I found a better solution to the problem!

Just convert the file to UTF-8 using the function mb_convert_encoding()!

Follow the code below:

    $conteudo = mb_convert_encoding(file_get_contents($chart), 'UTF-8', 'UTF-16LE');

    preg_match("/valorLoteIni=[0-9]{1-4}/", $conteudo, $match);

    $replacement =  'valorLoteIni='.$valor;

    $regex = preg_replace("/valorLoteIni=\d/", $replacement, $conteudo);

Answer 3

Good by default PCRE treats the string as a single line, but even so I believe it should marry the result of its regexp.

Try using the multiline modifier and see if you can get some results.

preg_match('/valorLoteIni=./m', $conteudo, $matches);

if the value of valueLoteIni is always an integer Voce can change to

preg_match('/valorLoteIni=\d/m', $conteudo, $matches);