Your code works fine for me, with the slight change of chomping $array at the beginning of the outer loop.
But I'm not sure why you don't just put all the filenames in @ARGV:
#!/usr/bin/perl
use strict;
use warnings;
#edit contains the complete path of the files to be edited
my $path = "./edit" ;
#geting a file handler
open(FL, "$path");
#getting all the file names in the @ARGV so that i can process them
chomp(@ARGV = <FL>);
# $INPUT_RECORD_SEPARATOR
$/="";
# $INPLACE_EDIT
$^I=".bak";
while(<>)
{
s/CONFIDENTIAL(.*?)own\s+risk/ /sm;
print ;
}
It's possible you are having file permission problems, in which case, you are probably better off not relying on $^I but instead explicitly renaming each file and opening the old and new names, checking each operation for success and giving a meaningful error message on failure.
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