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Returns string with all alphabetic characters converted to uppercase.
Note that 'alphabetic' is determined by the current locale. For instance, in the default "C" locale characters such as umlaut-a (ä) will not be converted.
Not: Den h�r funktionen �r bin�r-s�ker.
See also strtolower(), ucfirst(), ucwords() and mb_strtoupper().
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strtolower | Upp | strtr |