sorry for double post, i think the code explains with the comments what im trying to do :) 
$re='.*?(@)((?:[a-z][a-z0-9_]*))(\\[)(\\d+)(\\])'; #find arrays e.g: @
+arry[123]

open(FILE, "+<", "xxxxx.pl");
@code = <FILE>;
close FILE;

$code = join ("",@code);

foreach (@code) {

    if($_ =~ m/$re/) {  #check if this line contains any array

      my $random_number = int(rand(9999));        #create a new index 
+for that array
      $OldVariable = $1.$2.$3.$4.$5;              #store the old array
+ in variable
      $NewVariable = $1.$2.$3.$random_number.$5;  #changing the index 
+in the found array
      $code =~ s/$OldVariable/$NewVariable/g;     #now replace all of 
+that found array with the new one.

    }
}
print $code;
<>;

[download]
all of the arrays matching the exact one found should be replaced, eg: @array123 @array123 @array1234 @array1234 could be: @array6677 @array6677 @array8686 @array8686 thanks!

In reply to Same problem replacing array index numbers by astroid96

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