Regular Expression that accepts any number letters and '-' '\'

Can you suggest regular expressions for both PHP and HTML5 that accepts numbers, letters and '-' '\' ?

BUT any string must have a length between 4 and 30 chars.


 <input name="route" id="route" type="text" required title="4 to 30 characters/ 0-9 / A-Z/./'/'"   pattern="????"/>




Use this Regex


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