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Language/Type: PHP recursion string return

Write a recursive function named reverse that accepts a string parameter and returns that string with its characters in the opposite order. For example, the call of reverse("Hi you!") should return "!uoy iH" .


  • Do not declare any global variables.
  • Do not use any loops; you must use recursion.
  • Do not use any auxiliary data structures (e.g. arrays) or strings to solve this problem.
Function: Write a PHP function as described, not a complete program.

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