Regular Expressions 101

^start of line

Non-Capturing Group(?:accounts)?

?repeats the group contents below at most once:

accountsthe literal text accounts (case sensitive)

Non-Capturing Group(?:(?:,|^)leads)?

?repeats the group contents below at most once:

Non-Capturing Group(?:,|^)

1st Alternative,

,the literal , (44₁₀ / 54₈ / 2C₁₆)

2nd Alternative^

^start of line

leadsthe literal text leads (case sensitive)

Non-Capturing Group(?:(?:,|^)contacts)?

?repeats the group contents below at most once:

Non-Capturing Group(?:,|^)

1st Alternative,

,the literal , (44₁₀ / 54₈ / 2C₁₆)

2nd Alternative^

^start of line

contactsthe literal text contacts (case sensitive)

Non-Capturing Group(?:(?:,|^)opportunities)?

?repeats the group contents below at most once:

Non-Capturing Group(?:,|^)

1st Alternative,

,the literal , (44₁₀ / 54₈ / 2C₁₆)

2nd Alternative^

^start of line

opportunitiesthe literal text opportunities (case sensitive)

$end of line

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

^(?:accounts)?(?:(?:,|^)leads)?(?:(?:,|^)contacts)?(?:(?:,|^)opportunities)?$

Test String
New

accounts,leads,contacts,opportunities

accounts,opportunities
leads,opportunities

leads,accounts,contacts
accounts,leads,contacts,
,accounts,leads,contacts
apples,bananas,contacts

Regular Expression

Test StringNew

Test String
New