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Regular expression for 6 digits OR 25 digits
I can write a regular expression to match ANY number of digits between 6 and 25 ... ^[[:digit:]]{6,25}$ but how would I write a regular expression to match either 6 digits or 25 digits, but no number in between? ^([[:digit:]]{6}|[[:digit:]]{25})$ (The regular expressions in this example are Tcl and PHP/ereg types. use \d instead of [[:digit:]] for PHP/preg and Perl.) You may wonder why I want this. A client with 6 digit or 25 digit part numbers, a year number that can be 2 or 4 digits ... (written 2008-04-16 19:06:00) Associated topics are indexed under Q803 - Object Orientation and General technical topics - Regular Expressions - Extra ElementsH107 - String Handling in PHP T247 - Tcl/Tk - Advanced Regular Expressions
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