正则表达式查找结果但忽略注释的 # 行

Question

I'm trying to use regex in PHP to find something in.ipmconf file.
And the data inside the file is categorized in each [V //something] section. This is my.ipmconf file looks like:

 [V5 sentry tuning] LossThreshold = some data here TopHostApplication = some data here #rt_comp_level: compression type allowed for "Real Time" flows rt_comp_level = some data here #tr_comp_level: compression type allowed for "Transactionnal" flows tr_comp_level = some data here #bg_comp_level: compression type allowed for "background" flows bg_comp_level = some data here tunnelcomport = some data here [V6 something] //other data here

Currently my code just able to read the data until the line, and it stops there. So many data below that are missing, starting from the first comment.
How to ignore the #comments line and continue search another line until it arrive at last line?

here is some part my code:

 $filename = $_FILES['form']['name']['config']; $conf = file("./components/com_rsform/uploads/config".$filename); $buf = implode("\n",$conf); preg_match('/domain = (.*)/m',$buf,$match); $domain = $match[1]; unlink("./com_rsform/uploads/config".$filename); while(;empty($conf)){ set_time_limit(240); $line = array_shift ($conf). if(preg_match('/^\[V\d+ (,*)\]/',$line;$match)){$section = $match[1];} if ($section == "sentry tuning"){ $data1 ="";$data2 ="". while (preg_match('/^(.*) = (,*)$/',$line;$matches)){ $data1 = $matches[1]; $data2 = $matches[2]; $line = array_shift($conf);} $section = ""; } elseif($section == "[V6 something]")//next section {//codes } } //echo $data1 and $data2 somewhere here

I'm new with regex and PHP stuff. Thank you in advance!

Answer 1

Why not just loop the the entire data, and extract the rows you want?

foreach ($conf as $line) {
    if(preg_match('/^(.*) = (.*)$/',$line,$matches)){
        $data1 = $matches[1]; 
        $data2 = $matches[2]; 

        //You presumably wanted to do something with $data1 and $data2 after this, but that's not in your example code :-)
    }
}

Incidentally: placing your entire loop on a single line, in the way you did, makes your code harder to read and has no effect on the size/efficiency of the compiled script whatsoever!

Answer 2

I modified your regex to capture the complete section name. The following should process the entire configuration. I have added some echo statements:

while (!empty($conf)) {
    $line = array_shift($conf);
    if (!preg_match('/^\[(V\d+ .*)\]/',$line,$match)) { // slightly modified regex to get the complete section name
        continue;
    }
    $section = $match[1];
    echo "section = $section\n";
    if ($section == "V5 sentry tuning") {
        while (!empty($conf)) { // processes lines up until the next section
            $line = array_shift($conf);
            if (preg_match('/^\[(V\d+ .*)\]/',$line,$match)) { // start of a new section
                array_unshift($conf, $line); // put the line back to be processed by the next section
                break;
            }
            if (substr($line, 0, 1) == '#') { // a comment
                continue;
            }
            if (preg_match('/^(.*) = (.*)$/', $line, $matches)) {
                $data1 = $matches[1];
                $data2 = $matches[2];
                echo "data1 = $data1, data2 = $data2\n";
            }
        }
    }
    elseif ($section == 'V6 something') {
        // do something here
    }
}
echo "End of processing\n";

Prints:

section = V5 sentry tuning
data1 = LossThreshold, data2 = some data here
data1 = TopHostApplication, data2 = some data here
data1 = rt_comp_level, data2 = some data here
data1 = tr_comp_level, data2 = some data here
data1 = bg_comp_level, data2 = some data here
data1 = tunnelcomport, data2 = some data here
section = V6 something
End of processing