use strict;
my $str = 'Discover
Requirements: Discover cards start with the number 6011 or 65 and have 16 digits.
Pattern Parts:
Starts with number 6011 or 65, has 16 length, and has space or dash:
1) \\b6(?:011|5[0-9]{2})[ -]([0-9]{4}[ -]){2}([0-9]{4})\\b
Starts with number 6011 or 65, has 16 length, and has no space or dash:
2) \\b6(?:011|5[0-9]{2})(?:[0-9]{12})?$\\b
Combining 1-2 to form one pattern:
\\b6(?:011|5[0-9]{2})[ -]([0-9]{4}[ -]){2}([0-9]{4})\\b|\\b6(?:011|5[0-9]{2})(?:[0-9]{12})?$\\b
Test Cases:
Positive (Should fire):
16 length, no space, start with 6011 6011123412341234
16 length, dashes, start with 6011 6011-1234-1234-1234
16 length, spaces, start with 6011 6011 1234-1234-1234
16 length, no space, start with 65 6521123412341234
16 length, dashes, start with 65 6521-1234-1234-1234
16 length, spaces, start with 65 6521 1234 1234 1234
Embedded in sentence with space:
16 length, no space, start with 6011 Here is the cc: 6011123412341234
16 length, dashes, start with 6011 Here is the cc: 6011-1234-1234-1234
16 length, spaces, start with 6011 Here is the cc: 6011 1234-1234-1234
16 length, no space, start with 65 Here is the cc: 6521123412341234
16 length, dashes, start with 65 Here is the cc: 6521-1234-1234-1234
16 length, spaces, start with 65 Here is the cc: 6523 1234-1234-1234
16 length, no space, start with 6011 Credit Card#:6011123412341234
16 length, dashes, start with 6011 Credit Card#:6011-1234-1234-1234
16 length, spaces, start with 6011 Credit Card#:6011 1234-1234-1234
16 length, no space, start with 65 Credit Card#:6521123412341234
16 length, dashes, start with 65 Credit Card#:6521-1234-1234-1234
16 length, spaces, start with 65 Credit Card#:6523 1234-1234-1234
Negative (Should Not Fire):
16 length, no space, not start with 6012 6012123412341234
16 length, dashes, not start with 6012 6012-1234-1234-1234
16 length, spaces, not start with 6012 6012 1234 1234 1234
16 length, no space, not start with 66 6612123412341234
16 length, dashes, not start with 66 6612-1234-1234-1234
16 length, spaces, not start with 66 6612-1234-1234-1234
16 length, no space, start with 65, embedded Credit Card Number6521123412341234
16 length, dashes, start with 6011, malformed 601-11234-1234-1234
16 length num matching pattern but embedded User ID: 0000006011123412341234000000';
my $regex = qr/\b6(?:011|5[0-9]{2})[ -]([0-9]{4}[ -]){2}([0-9]{4})\b|\b6(?:011|5[0-9]{2})(?:[0-9]{12})?$\b/mp;
if ( $str =~ /$regex/g ) {
print "Whole match is ${^MATCH} and its start/end positions can be obtained via \$-[0] and \$+[0]\n";
# print "Capture Group 1 is $1 and its start/end positions can be obtained via \$-[1] and \$+[1]\n";
# print "Capture Group 2 is $2 ... and so on\n";
}
# ${^POSTMATCH} and ${^PREMATCH} are also available with the use of '/p'
# Named capture groups can be called via $+{name}
Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html