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Escape a character with backslashes (See related posts)

Ruby:
s = "12345"
puts s.gsub(/(2|4)/, '\\\\\1')


PHP:
$s="12345";
print preg_replace("/(2|4)/", '\\\\\1', $s);


Perl:
$s="123456";
$s =~ s/(2|4)/\\\1x/g;
print $s;

to ruby regex php perl by thesaint on Sat Sep 16 09:17:13 -0400 2006

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