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:
   
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   ^.{3,}$

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

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

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

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

   
   
5. Numbers between 0 and 100 (useful for positive values under and 3 digit threshold like 100):
   
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   ^[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
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   ^[0]{1}$|^(?!0*[.,]0*$|[.,]0*$|0*$)\\d+[,.]?\\d{0,2}$

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

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

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

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