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+**Warning**: this command was renamed to `GETRANGE`, it is called `SUBSTR` in
+Redis versions `<= 2.0`.
+
+Returns the substring of the string value stored at `key`, determined by the
+offsets `start` and `end` (both are inclusive). Negative offsets can be used in
+order to provide an offset starting from the end of the string. So -1 means the
+last character, -2 the penultimate and so forth.
+
+The function handles out of range requests by limiting the resulting range to
+the actual length of the string.
+
+@return
+
+@bulk-string-reply
+
+@examples
+
+```cli
+SET mykey "This is a string"
+GETRANGE mykey 0 3
+GETRANGE mykey -3 -1
+GETRANGE mykey 0 -1
+GETRANGE mykey 10 100
+```