Function Reference
— Function File: regexptranslate (op, s)

Translate a string for use in a regular expression. This might include either wildcard replacement or special character escaping. The behavior can be controlled by the op that can have the values

"wildcard"
The wildcard characters ., * and ? are replaced with wildcards that are appropriate for a regular expression.
"escape"
The characters $.?[], that have special meaning for regular expressions are escaped so that they are treated literally.