Frequently used Regular Expressions

Condition

Explanation

Regex

Email

This regex matches any string that consists of a username, followed by an @ symbol, followed by a domain name, followed by a dot, followed by a top-level domain. The username can contain letters, numbers, periods, underscores, or hyphens. The domain name can contain letters, numbers, periods, or hyphens. The top-level domain can contain two or more letters.

^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\.[a-zA-Z]{2,}$

Phone

This regex is used to match a specfic pattern of text, representing phone numbers in the format "###-###-####".

^\d{3}-\d{3}-\d{4}$

Credit Card

This regex matches any string that consists of 16 digits. The digits can be any number from 0 to 9.

^\d{16}$

Credit Card Expiry

This regex is designed to match a specific pattern of text, that represent dates in the format "MM/DD" where MM is the month (01 to 12) and DD is the day (22 to 39).

^(0[1-9]|1[0-2])\/(2[2-9]|3[0-9])$

Currency Code

This regex matches any string that consists of three uppercase letters.

^[A-Z]{3}$

US ZIP Code

This regex matches any string that consists of five digits.

^\d{5}$

IP Address

This regex matches any string that consists of four numbers, separated by periods. Each number can be from 0 to 255.

^(\d{1,3}\.){3}\d{1,3}$

Passwords

This regex is designed to enforce certain password complexity requirements. It checks if a string contains at least one special character from the set [!@#$%^&*()_+[\]{};':"\\|,.<>/?] and is at least 8 characters long.

^(?=.*[!@#$%^&*()_+[\]{};':"\\|,.<>/?]).{8,}$