======base64decode======

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Base64-decode a [[PTPScript:Types:String|String]].

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**Syntax**
  * ''[[PTPScript:Types:String|String]] base64decode( [[PTPScript:Types:String|String]] subject )''

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**Parameters**
  * [[PTPScript:Types:String|String]] ''subject'' - The String to be Base64-decoded.

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**Result**
  * [[PTPScript:Types:String|String]] - The decoded String.
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Returns ''subject'' decoded with MIME Base64.