======sha1======

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Calculate the SHA1 hash of a [[PTPScript:Types:String|String]].

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**Syntax**
  * ''[[PTPScript:Types:String|String]] sha1( [[PTPScript:Types:String|String]] subject )''

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**Parameters**
  * [[PTPScript:Types:String|String]] ''subject'' - The String to calculate a hash for.

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**Result**
  * [[PTPScript:Types:String|String]] - The SHA1 hash.
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Returns the SHA1 hash of ''subject''. The hash is a 40-character hexadecimal number.