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Regular Expressions

Examples of regular expressions to be used in some parts of Tiki

Tracker validation fields, such as text fields, allow to have some check against a regular expression. Some examples are:

  1. Only records with more than 2 letters in the field are allowed:
    ^.{3,}$

  2. Only lowercase letters, numbers and dashes are allowed:
    ^[a-z0-9\-]+$

  3. Only lowercase letters in emails, therefore, letters, numbers, dots, dashes and underscores are allowed:
    ^[a-z0-9.\@\-\_]+$

    Or an alternative (and more permissive) approach: all except uppercase letters:
    ^[^A-Z]+$

  4. Numbers between 0 and 1 (very useful to validate probabilities):
    ^((0(\.[0-9]*)?)|(1(\.0)?))$

  5. Numbers between 0 and 100 (useful for positive values under and 3 digit threshold like 100):
    ^[0-9]{1}$|^[0-9]{1}[0-9]{1}$|^[1]{1}[0]{1}[0]{1}$|^100$

  6. Positive numbers or zero only (useful for measurements of concentrations of chemical substances, for instance):
    In Tiki 12.x LTS
    ^[0]{1}$|^(?!0*[.,]0*$|[.,]0*$|0*$)\\d+[,.]?\\d{0,2}$


    Since Tiki 14.x
    ^[0]{1}$|^(?!0*[.,]0*$|[.,]0*$|0*$)\d+[,.]?\d{0,2}$

  7. Uppercase letter, two numbers, dash, two numbers (e.g.: X00-00)
    [A-Z][0-9][0-9]-[0-9][0-9]

  8. Any user with the domain name ending with .example.com
    /(^[^@]*@[^,]*.example.com$)/

Alias names for this page

Regexp | Regular Expression | Regular Expressions | RegularExpression | RegularExpressions | regex

Created by: Last Modification: Wednesday 01 February, 2017 10:56:24 GMT-0000 by Xavier de Pedro
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