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Regular Expression validation

Views Views: 15,790
Last updated Last updated: Jan 7, 2016

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A customizable Validation rule. Runs a Regular Expression to test for Validation success or failure

Error message - The message to display next to the element if the Validation fails. This text should explain why the Validation failed and what steps the user should take to remedy the error.

Condition - A PHP expression which if returns false, means that the Validation is not run. See here for more information.

Regular expression- A regular expression (must start and end with /)

Uses PHP's preg_match function to determine if there is a match in the data. If there is then Validation succeeds otherwise it fails

Match or Replace

If set to match then the Validation behaves as normal and on Validation failure returns you to the form showing the error message.

If set to 'replace' then the submitted value is replaced with the data contained in the field 'Replace string'

Replace string - the data to replace the submitted data with if the Validation fails and 'Match or Replace' is set to 'Replace'

Tip text - The hover text used to describe the Validation.

Icon - the icon to use for the validation. Appears next to the field label.

Note that people looking for input masks should use the regular express (or PHP validation rule)

Helpful links:

http://ch.php.net/manual/en/reference.pcre.pattern.syntax.php

http://www.regular-expressions.info/quickstart.html

Library of user submitted regular expressions

Example Regular Expressions

US Phone number

Code:

/^[0-9]{3}-[0-9]{3}-[0-9]{4}|[0-9]{10}|[(][0-9]{3}[)][0-9]{3}-[0-9]{4}$/

Will match the following formats

1231234567

123-123-4567

(123)123-4567

Phone number example:

US Social Security number

Code:

/\b(?!000)(?!666)(?:[0-6]\d{2}|7(?:[0-356]\d|7[012]))[- ](?!00)\d{2}[- ](?!0000)\d{4}\b/

Will match the valid formats as described here http://en.wikipedia.org/wiki/Social_Security_number#Valid_SSNs

UK Post code

Code:

/(GIR 0AA)|((([A-Z-[QVX]][0-9][0-9]?)|(([A-Z-[QVX]][A-Z-[IJZ]][0-9][0-9]?)|(([A-Z-[QVX]][0-9][A-HJKSTUW])|([A-Z-[QVX]][A-Z-[IJZ]][0-9][ABEHMNPRVWXY])))) [0-9][A-Z-[CIKMOV]]{2}) /

Alphanumeric without spaces

Code:

/^\w*$/

Regular Expression validation

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