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<?php $string = '$descriptions.language_id = ? AND (x = true OR $xyz.pippo = ?)'; echo preg_replace_callback('#(\$([a-z0-1\._]+))#i', function($matches) { return strtoupper($matches[1]); }, $string);
Output for git.master, git.master_jit, rfc.property-hooks
$DESCRIPTIONS.LANGUAGE_ID = ? AND (x = true OR $XYZ.PIPPO = ?)

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