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my @numbers4 = $text =~ /\b \d{4} \b/gx; foreach $unit4 (@numbers4) { $text =~ s/$unit4/\<a href=\"script.pl?do=view&unit=$unit4\"\>\<b\>$un +it4\<\/b\>\<\/a\>/i; }
<a href="script.pl?do=view&unit=<a href="script.pl?do=view&unit=2003"> +<b>2003</b>