Perl可以让变量来操作文件，我们可以从文件中读取或写入数据，下面就让武林技术频道小编和大家说说perl读写文件代码实例，一起跟着小编的思路来学习吧！
#mode operand create truncate
#read <
#write > yes yes
#append >> yes
Case 1: Throw an exception if you cannot open the file:
use strict;
use warnings;
my $filename = 'data.txt';
open(my $fh, '<:encoding(UTF-8)', $filename)
or die "Could not open file '$filename' with the error $!";
while (my $row = <$fh>) {
chomp $row;
print "$row/n";
}
close($fh);
Case 2: Give a warning if you cannot open the file, but keep running:
use strict;
use warnings;
my $filename = 'data.txt';
if (open(my $fh, '<:encoding(UTF-8)', $filename)) {
while (my $row = <$fh>) {
chomp $row;
print "$row/n";
}
close($fh);
} else {
warn "Could not open file '$filename' $!";
}
Case 3: Read one file into array
use strict;
use warnings;
my $filename = 'data.txt';
open (FILEIN, "<", $filename)
or die "Could not open file '$filename' with the error $!";
my @FileContents = <FILEIN>;
for my $l (@FileContents){
print "$l/n";
}
close FILEIN;
关于perl读写文件代码实例的全部介绍武林技术频道就给大家介绍到这里了，如果你觉得这篇文章可以帮助到大家，也可以分享给别人。
