Perl-正则表达式问题 [英] Perl -- regex issue

问题描述

我有以下代码来在字符串中获取子字符串，我正在使用正则表达式，但它们似乎无法正常工作.我该怎么办?

I have the following code to get a substring inside an string, I'm using regular expressions but they seem not to work properly. How can I do it?

我有这个字符串:

vlex.es/jurisdictions/ES/search?textolibre=transacciones+banco+de+bogota&translated_textolibre=,300,220,00:00:38,2,0.00%,38.67%,€0.00

我想得到这个子字符串:

and I want to get this substring:

transacciones+banco+de+bogota

代码:

open my $info, $myfile or die "Could not open $myfile: $!";

while (my $line = <$info>) {
    if ($line =~ m/textolibre=/) {
        my $line =~ m/textolibre=(.*?)&translated/g;
        print $1;
    }

    last if $. == 3521239;
}

close $info;

错误:

Use of uninitialized value $line in pattern match (m//) at classifier.pl line 10, <$info> line 20007.
Use of uninitialized value $1 in print at classifier.pl line 11, <$info> line 20007.

推荐答案

$line的第二个声明是错误的，请删除my:

the second declaration of $line is erroneous, drop my:

$line =~ m/textolibre=(.*?)&translated/g;

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