Function

a!isPhoneNumber( phoneNumber, countryCode )

Returns true if the phoneNumber parameter contains a valid phone number, otherwise returns false. A phone number is considered valid if its area code is valid, the length is appropriate based upon the value of the countryCode parameter, and the number after the area code is not all zeroes. This function supports countries and area codes for international numbers.

Parameters

Returns

Boolean

Usage considerations

Valid phone numbers

A phone number is considered valid if:

• The area code is valid.
• The length is appropriate based upon the value of the countryCode parameter.
• The number after the area code is not all zeroes.

However, an invalid phone number can still be dialed. For example, the phone number 1800-MICROSOFT is invalid because it is too long, but a user could dial this number since the extra digits will be ignored.

Using the countryCode parameter

The countryCode parameter can include one or more country codes. If you provide multiple country codes, the function will return true when it matches one of the provided country codes. See a list of supported country codes below.

If the phone number does not match any of the provided country codes, the function will return false.

If no countryCode is provided, but the phone number contains an international code (+[country code]), then the function will use the international code to determine if the provided phone number is valid.

For example, let's say you provide the phone number +34 913 30 28 00 without providing a countryCode parameter. Since +34 is the international code for Spain, the function will return true if the provided phone number is a Spain phone number.

Examples

Copy and paste these examples into an Appian Expression Editor to test out this function.

Using only the phoneNumber parameter

The countryCode parameter is optional if an international code (+<international code here>) is provided as part of the phone number.

For example, the example below does not need the countryCode parameter since the international code (+52) is part of the provided phone number.

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a!isPhoneNumber(
  phoneNumber: "+52 55 5487 3100",
)

Returns true

However, if you tried to use the following example, the function would return false because there is no international code in the provided phone number, and no countryCode parameter.

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a!isPhoneNumber(
  phoneNumber: "55 5487 3100",
)

Returns false

Using the countryCode parameter

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a!isPhoneNumber(
 /* This is a valid Cancun mobile phone number */
   phoneNumber: "1-998-185-3133",
 /* United States country code */ 
   countryCode: "US",
)

Returns false

Using a list of country codes

The countryCode parameter can accept an array of country codes. You may want to add a list of country codes if your application is used across multiple countries so you can validate different phone numbers accordingly.

In the example below, there are two country codes: Mexico and United States. Since this is phone number in Mexico, the function will ignore the first country code (United States) and validate as a phone number in Mexico.

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a!isPhoneNumber(
 /* This is a valid Cancun mobile phone number */
  phoneNumber: "1-998-185-3133",
 /* Mexico and United States country codes */ 
  countryCode: {"US", "MX"}
)

Returns true

Using this function in an interface

The following example uses the a!isPhoneNumber() and a!formatPhoneNumber() functions to validate and format a user-provided phone number, which could be a phone number in the United States, Great Britain, or Germany.

Copy and paste this example into an Appian Interface to test out this function.

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a!localVariables(
  local!phoneNumber,
  local!isNumberValid,
  a!textField(
    label: "Phone Number",
    labelPosition: "ABOVE",
    instructions: "Enter a phone number",
    value: local!phoneNumber,
    saveInto: {
      local!phoneNumber,
      a!save(
        local!isNumberValid,
        a!isPhoneNumber(
          phoneNumber: local!phoneNumber,
          countryCode: {"US", "GB", "DE"}
        )
      ),
      if(
        local!isNumberValid,
        a!save(
          local!phoneNumber,
          a!formatPhoneNumber(
            phoneNumber: local!phoneNumber,
            countryCode: {"US", "GB", "DE"},
            outputFormat: "INTERNATIONAL",
          )
        ),
        {}
      )
    },
    refreshAfter: "UNFOCUS",
    validations: if(
      local!isNumberValid,
      "",
      "Please enter a valid phone number."
    ),
    inputPurpose: "PHONE_NUMBER",   
  )
)

Returns

Supported country codes

The following table lists all ISO alpha-2 codes supported by the a!isPhoneNumber() function:

Feature compatibility