Addresses

//Address: State code (US)
'/\b(?:A[KLRZ]|C[AOT]|D[CE]|FL|GA|HI|I[ADLN]|K[SY]|LA|M[ADEINOST]|N[CDEHJMVY]|O[HKR]|PA|RI|S[CD]|T[NX]|UT|V[AT]|W[AIVY])\b/'

//Address: ZIP code (US)
'b[0-9]{5}(?:-[0-9]{4})?b'

Columns

//Columns: Match a regex starting at a specific column on a line.
'^.{%SKIPAMOUNT%}(%REGEX%)'

//Columns: Range of characters on a line, captured into backreference 1
//Iterate over all matches to extract a column of text from a file
//E.g. to grab the characters in colums 8..10, set SKIPAMOUNT to 7, and CAPTUREAMOUNT to 3
'^.{%SKIPAMOUNT%}(.{%CAPTUREAMOUNT%})'

Credit cards

//Credit card: All major cards
'^(?:4[0-9]{12}(?:[0-9]{3})?|5[1-5][0-9]{14}|6011[0-9]{12}|3(?:0[0-5]|[68][0-9])[0-9]{11}|3[47][0-9]{13})$'

//Credit card: American Express
'^3[47][0-9]{13}$'

//Credit card: Diners Club
'^3(?:0[0-5]|[68][0-9])[0-9]{11}$'

//Credit card: Discover
'^6011[0-9]{12}$'

//Credit card: MasterCard
'^5[1-5][0-9]{14}$'

//Credit card: Visa
'^4[0-9]{12}(?:[0-9]{3})?$'

//Credit card: remove non-digits
'/[^0-9]+/'

CSV

//CSV: Change delimiter
//Changes the delimiter from a comma into a tab.
//The capturing group makes sure delimiters inside double-quoted entries are ignored.
'("[^"rn]*")?,(?![^",rn]*"$)'

//CSV: Complete row, all fields.
//Match complete rows in a comma-delimited file that has 3 fields per row,
//capturing each field into a backreference.  
//To match CSV rows with more or fewer fields, simply duplicate or delete the capturing groups.
'^("[^"rn]*"|[^,rn]*),("[^"rn]*"|[^,rn]*),("[^"rn]*"|[^,rn]*)$'

//CSV: Complete row, certain fields.
//Set %SKIPLEAD% to the number of fields you want to skip at the start, and %SKIPTRAIL% to
//the number of fields you want to ignore at the end of each row.  
//This regex captures 3 fields into backreferences.  To capture more or fewer fields,
//simply duplicate or delete the capturing groups.
'^(??:"[^"rn]*"|[^,rn]*),){%SKIPLEAD%}("[^"rn]*"|[^,rn]*),("[^"rn]*"|[^,rn]*),("[^"rn]*"|[^,rn]*)(??:"[^"rn]*"|[^,rn]*),){%SKIPTRAIL%}$'

//CSV: Partial row, certain fields
//Match the first SKIPLEAD+3 fields of each rows in a comma-delimited file that has SKIPLEAD+3
//or more fields per row.  The 3 fields after SKIPLEAD are each captured into a backreference.  
//All other fields are ignored.  Rows that have less than SKIPLEAD+3 fields are skipped.  
//To capture more or fewer fields, simply duplicate or delete the capturing groups.
'^(??:"[^"rn]*"|[^,rn]*),){%SKIPLEAD%}("[^"rn]*"|[^,rn]*),("[^"rn]*"|[^,rn]*),("[^"rn]*"|[^,rn]*)'

//CSV: Partial row, leading fields
//Match the first 3 fields of each rows in a comma-delimited file that has 3 or more fields per row.  
//The first 3 fields are each captured into a backreference.  All other fields are ignored.  
//Rows that have less than 3 fields are skipped.  To capture more or fewer fields,
//simply duplicate or delete the capturing groups.
'^("[^"rn]*"|[^,rn]*),("[^"rn]*"|[^,rn]*),("[^"rn]*"|[^,rn]*)'

//CSV: Partial row, variable leading fields
//Match the first 3 fields of each rows in a comma-delimited file.  
//The first 3 fields are each captured into a backreference.
//All other fields are ignored.  If a row has fewer than 3 field, some of the backreferences
//will remain empty.  To capture more or fewer fields, simply duplicate or delete the capturing groups.  
//The question mark after each group makes that group optional.
'^("[^"rn]*"|[^,rn]*),("[^"rn]*"|[^,rn]*)?,("[^"rn]*"|[^,rn]*)?'

Dates

//Date d/m/yy and dd/mm/yyyy
//1/1/00 through 31/12/99 and 01/01/1900 through 31/12/2099
//Matches invalid dates such as February 31st
'b(0?[1-9]|[12][0-9]|3[01])[- /.](0?[1-9]|1[012])[- /.](19|20)?[0-9]{2}b'

//Date dd/mm/yyyy
//01/01/1900 through 31/12/2099
//Matches invalid dates such as February 31st
'(0[1-9]|[12][0-9]|3[01])[- /.](0[1-9]|1[012])[- /.](19|20)[0-9]{2}'

//Date m/d/y and mm/dd/yyyy
//1/1/99 through 12/31/99 and 01/01/1900 through 12/31/2099
//Matches invalid dates such as February 31st
//Accepts dashes, spaces, forward slashes and dots as date separators
'b(0?[1-9]|1[012])[- /.](0?[1-9]|[12][0-9]|3[01])[- /.](19|20)?[0-9]{2}b'

//Date mm/dd/yyyy
//01/01/1900 through 12/31/2099
//Matches invalid dates such as February 31st
'(0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])[- /.](19|20)[0-9]{2}'

//Date yy-m-d or yyyy-mm-dd
//00-1-1 through 99-12-31 and 1900-01-01 through 2099-12-31
//Matches invalid dates such as February 31st
'b(19|20)?[0-9]{2}[- /.](0?[1-9]|1[012])[- /.](0?[1-9]|[12][0-9]|3[01])b'

//Date yyyy-mm-dd
//1900-01-01 through 2099-12-31
//Matches invalid dates such as February 31st
'(19|20)[0-9]{2}[- /.](0[1-9]|1[012])[- /.](0[1-9]|[12][0-9]|3[01])'

Delimiters

//Delimiters: Replace commas with tabs
//Replaces commas with tabs, except for commas inside double-quoted strings
'((?:"[^",]*+")|[^,]++)*+,'

Email addresses

//Email address
//Use this version to seek out email addresses in random documents and texts.
//Does not match email addresses using an IP address instead of a domain name.
//Does not match email addresses on new-fangled top-level domains with more than 4 letters such as .museum.  
//Including these increases the risk of false positives when applying the regex to random documents.
'b[A-Z0-9._%-]+@[A-Z0-9.-]+.[A-Z]{2,4}b'

//Email address (anchored)
//Use this anchored version to check if a valid email address was entered.
//Does not match email addresses using an IP address instead of a domain name.
//Does not match email addresses on new-fangled top-level domains with more than 4 letters such as .museum.
//Requires the "case insensitive" option to be ON.
'^[A-Z0-9._%-]+@[A-Z0-9.-]+.[A-Z]{2,4}$'

//Email address (anchored; no consecutive dots)
//Use this anchored version to check if a valid email address was entered.
//Improves on the original email address regex by excluding addresses with consecutive dots such as john@aol...com
//Does not match email addresses using an IP address instead of a domain name.
//Does not match email addresses on new-fangled top-level domains with more than 4 letters such as .museum.  
//Including these increases the risk of false positives when applying the regex to random documents.
'^[A-Z0-9._%-]+@(?:[A-Z0-9-]+.)+[A-Z]{2,4}$'

//Email address (no consecutive dots)
//Use this version to seek out email addresses in random documents and texts.
//Improves on the original email address regex by excluding addresses with consecutive dots such as john@aol...com
//Does not match email addresses using an IP address instead of a domain name.
//Does not match email addresses on new-fangled top-level domains with more than 4 letters such as .museum.  
//Including these increases the risk of false positives when applying the regex to random documents.
'b[A-Z0-9._%-]+@(?:[A-Z0-9-]+.)+[A-Z]{2,4}b'

//Email address (specific TLDs)
//Does not match email addresses using an IP address instead of a domain name.
//Matches all country code top level domains, and specific common top level domains.
'^[A-Z0-9._%-]+@[A-Z0-9.-]+.(?:[A-Z]{2}|com|org|net|biz|info|name|aero|biz|info|jobs|museum|name)$'

//Email address: Replace with HTML link
'b(?:mailto:)?([A-Z0-9._%-]+@[A-Z0-9.-]+.[A-Z]{2,4})b'

HTML

//HTML comment
'<!--.*?-->'

//HTML file
//Matches a complete HTML file.  Place round brackets around the .*? parts you want to extract from the file.
//Performance will be terrible on HTML files that miss some of the tags
//(and thus won't be matched by this regular expression).  Use the atomic version instead when your search
//includes such files (the atomic version will also fail invalid files, but much faster).
'<html>.*?<head>.*?<title>.*?</title>.*?</head>.*?<body[^>]*>.*?</body>.*?</html>'

//HTML file (atomic)
//Matches a complete HTML file.  Place round brackets around the .*? parts you want to extract from the file.
//Atomic grouping maintains the regular expression's performance on invalid HTML files.
'<html>(?>.*?<head>)(?>.*?<title>)(?>.*?</title>)(?>.*?</head>)(?>.*?<body[^>]*>)(?>.*?</body>).*?</html>'

//HTML tag
//Matches the opening and closing pair of whichever HTML tag comes next.
//The name of the tag is stored into the first capturing group.
//The text between the tags is stored into the second capturing group.
'<([A-Z][A-Z0-9]*)[^>]*>(.*?)</1>'

//HTML tag
//Matches the opening and closing pair of a specific HTML tag.
//Anything between the tags is stored into the first capturing group.
//Does NOT properly match tags nested inside themselves.
'<%TAG%[^>]*>(.*?)</%TAG%>'

//HTML tag
//Matches any opening or closing HTML tag, without its contents.
'</?[a-z][a-z0-9]*[^<>]*>'