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Formulas - Regex

Dilyara Updated by Dilyara

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  • RegexText

RegexTest

Check if the user input contains only numbers and no other characters

In a case where you want to validate that the input from a user contains numbers only, what we need to do is store in Landbot variable (in this example we call it @user_number), then use the Formula block:

RegexTest(/^\d+$/,@user_number)

Check for numbers of 11 digits

In a case where you want to validate that the input from a user has 11 digits, what we need to do is store in Landbot variable (in this example we call it @code_number), then use the Formula block:

RegexTest(/^\d{11}$/,@code_number)

Note: We want to validate if is TRUE or FALSE, that the number matches our pattern, so we will set up the Block Outputs as TRUE/FALSE

You'll be able to set in the builder bot:

  • The True output (green arrow) - to confirm the user that the number is in the correct format and has the correct number of digits.
  • The False output (red arrow) - to send a message explaining that it's incorrect and connects this message with the text block to start the flow again (asking for the number). 
Check if the input is a valid UK postal code
RegexTest(/([A-PR-UWYZ][A-HK-Y0-9](?:[A-HJKS-UW0-9][ABEHMNPRV-Y0-9]?)?\s*[0-9][ABD-HJLNP-UW-Z]{2}|GIR\s*0AA)/,@text)

Check if the input is a valid US zip code

RegexTest(/^(^[A-Za-z]\d[A-Za-z][ ]?\d[A-Za-z]\d$)|(^\d{5}$)/, @text)

Check if the input is a valid Canadian postal code
RegexTest(/^([A-Za-z]\d[A-Za-z][ -]?\d[A-Za-z]\d)/,@text)

Check if the input is a valid Brazilian postal code

In this case, it accepts both XXXXX-XXX and XXXXXXXX formats:

RegexTest(/^\d{5}-?\d{3}$/,@text)

Check if the input is a valid French postal code
RegexTest(/^(([0-8][0-9])|(9[0-5]))[0-9]{3}$/,@text)
Check if the input contains a word that is "stop" or something that starts with "stop"

RegexTest(/^stop.*/,@text)

Check if the input contains only letters

In this case, spaces are allowed:

RegexTest(/^[a-zA-Z\s]*$/, @text)
Check if the input contains only letters, including special characters and accent

RegexTest(/^[a-zA-ZÀ-ÿ\u00f1\u00d1]+(\s*[a-zA-ZÀ-ÿ\u00f1\u00d1]*)*[a-zA-ZÀ-ÿ\u00f1\u00d1]*$/,@text)
Check if the input time input is in format HH:mm:ss

In this example, in the variable @text we are storing the time by the user

RegexTest(/(?:[01]\d|2[0123]):(?:[012345]\d):(?:[012345]\d)/,@text)

Check if the time input is in format HH:mm
RegexTest(/^(0[0-9]|1[0-9]|2[0-3]):[0-5][0-9]$/, @text)
Check if the date input is in format yyyy-mm-dd

In this example, in the variable @date we are storing the date by the user

RegexTest(/([12]\d{3}-(0[1-9]|1[0-2])-(0[1-9]|[12]\d|3[01]))/,@date)

Check if the date input is in format mm-dd-yyyy
RegexTest(/^(0[1-9]|1[0-2])-(0[1-9]|[12][0-9]|3[01])-\d{4}$/,@text)

Check if the date is in format dd-mm-yyyy
RegexTest(/^(0[1-9]|[12][0-9]|3[01])-(0[1-9]|1[0-2])-\d{4}$/,@text)
Check if the input is in format of South African ID number
RegexTest(/(((\d{2}((0[13578]|1[02])(0[1-9]|[12]\d|3[01])|(0[13456789]|1[012])(0[1-9]|[12]\d|30)|02(0[1-9]|1\d|2[0-8])))|([02468][048]|[13579][26])0229))(( |-)(\d{4})( |-)(\d{3})|(\d{7}))/,@text)

Check if the input is a valid French VAT number
RegexTest(/^[A-Za-z]{2,4}(?=.{2,12}$)[-_\s0-9]*(?:[a-zA-Z][-_\s0-9]*){0,2}$/, @text)
Check if uploaded file contains image
RegexTest(/(.*?)\.(jpg|JPG|png|PNG|jpeg|JPEG)$/, @file)

Check if the input contains Italian country code

In this case, the correct format will start with "+39".

RegexTest(/^(([+])39)/,@text)

Check if the input is a valid Spanish phone number

In this case, the country code is optional:

RegexTest(/^(\+34|0034|34)?[ -]*(6|7)[ -]*([0-9][ -]*){8}/,@phone)

Check if the input is a valid Italian phone number
RegexTest(/^(([+]|00)39)?((3[1-6][0-9]))(\d{7})$/,@phone)

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