If you really want to do it using substr and index then here is one iterative method:

use strict;
use warnings;

my $line='PSAPPSRV.26476584 (6) 01/02/19 06:30:30 GetCertificate(3) Re
+turning context. ID=PTWEBSERVER, Lang=ENG';
my $SpaceChar = ' ';
my $result = $line;
for (1..4) {
    $result = substr ($result, index ($result, $SpaceChar) + 1);

    print "$result\n";
}

[download]

Here's a simpler one with split instead:

#!/usr/bin/env perl 
use strict;
use warnings;

my $line='PSAPPSRV.26476584 (6) 01/02/19 06:30:30 GetCertificate(3) Re
+turning context. ID=PTWEBSERVER, Lang=ENG';
my $SpaceChar = ' ';
my $result = (split ($SpaceChar, $line, 5))[4];
print "$result\n";

[download]

Update: edit of first snippet to remove expensive no-op.

In reply to Re: With substr, index the offset don't get proper start position by hippo
in thread With substr, index the offset don't get proper start position by Oskym

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