case insensitive replace

From: Date: Sat, 06 Oct 2001 15:38:26 +0000
Subject: case insensitive replace
Groups: php.general 
Request: Send a blank email to php-general+get-70223@lists.php.net to get a copy of this message
Hello, I'm trying replace $field with "[<a href="something">$field</a>]" in $string, but here's the problem. If $field is for example SQL then str_replace replaces only "SQL" not "Sql" or "sql". I tried with preg_replace but i cant find any good solution. Can anyone help me ? thx

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