Section
4.3.2
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General
Regular expressions are a concise powerful way to represent a broad range of validation rules.
Django
Use Python's re module.
Natural Webagent
Not available in Natural/webAgent. Mimic their functionality using MASK.
.NET
The RegularExpressionValidator class can be used to easily check user-submitted data against custom regular expressions.
PHP
Avoid using preg_replace() when possible, as insertion of the "e" modifier will cause the replacement string to be executed as PHP code after evaluation.