I posted something about this the other day and got some good suggestions. Unfortunately, some were above my pay grade. I am using the following to recognize 3-digit and 4-digit numbers in a text field. It works, but with a few issues. For one thing it tags phone numbers. No big deal, but I wish I could recognize a 10-digit or 7-digit number with a dash and not link to it. The main question I have now is, if the same number appears in the text field, it screws up the first link and doesn't link to the second. Obviously, the code I have here has a limitation. I need a suggestion for a way around this. 
my @numbers4 = $text =~ /\b \d{4} \b/gx;
foreach $unit4 (@numbers4) {
$text =~ s/$unit4/\<a href=\"unit=$unit4\"\>\<b\>$unit4\<\/b\>\<\/a\>/
+i;
}

# look for 3 digit numbers and make link to Resident Info card.
my @numbers3 = $text =~ /\b \d{3} \b/gx;
foreach $unit3 (@numbers3) {
$text =~ s/$unit3/\<a href=\"?unit=$unit3\"\><b\>$unit3<\/b\>\<\/a\>/i
+;
}

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How can I work around the same 3 or 4 digit number appearing multiple times in the $text field? Thanks,

In reply to Recognizing numbers and creating links by htmanning

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