PHP sql_regcase function

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sql_regcase

(PHP 3, PHP 4, PHP 5)

Returns a valid regular expression which will match
string, ignoring case. This expression is
string with each alphabetic character converted to a
bracket expression; this bracket expression contains that
character’s uppercase and lowercase form. Other characters remain unchanged.

Example 1. sql_regcase() example

echo sql_regcase("Foo - bar.");

The above example will output:

This can be used to achieve case insensitive pattern matching in
products which support only case sensitive regular expressions.