(PHP 4, PHP 5)
sql_regcase — Make regular expression for case insensitive match
$string
   )Creates a regular expression for a case insensitive match.
This function has been DEPRECATED as of PHP 5.3.0. Relying on this feature is highly discouraged.
stringThe input string.
   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
<?php
echo sql_regcase("Foo - bar.");
?>
The above example will output:
[Ff][Oo][Oo] - [Bb][Aa][Rr].
This can be used to achieve case insensitive pattern matching in products which support only case sensitive regular expressions.
Note:
As of PHP 5.3.0, the regex extension is deprecated in favor of the PCRE extension. Calling this function will issue an
E_DEPRECATEDnotice. See the list of differences for help on converting to PCRE.