Pass Variables Between Perl Scripts Guide

There are several methods to pass variables in Perl scripts.

1. Input arguments

# 脚本1.pl
my $var = $ARGV[0];
print "脚本1传递的变量值为：$var\n";

# 运行脚本
perl 脚本1.pl hello

1. Passing environment variables: it is possible to set environment variables in one script and retrieve the values of those variables in another script.

# 脚本1.pl
$ENV{'MYVAR'} = "hello";

# 脚本2.pl
my $var = $ENV{'MYVAR'};
print "脚本1传递的变量值为：$var\n";

1. File Transfer: You can write the value of a variable to a file and then read the file’s content in another script to get the variable’s value.

# 脚本1.pl
open(my $fh, '>', 'var.txt') or die "无法打开文件: $!";
print $fh "hello";
close($fh);

# 脚本2.pl
open(my $fh, '<', 'var.txt') or die "无法打开文件: $!";
my $var = <$fh>;
close($fh);
chomp($var);
print "脚本1传递的变量值为：$var\n";

These methods can be chosen to be used based on specific needs or can be combined based on actual situations.