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is_sorted

Language/Type: PHP arrays sorting traversals

Write a function named is_sorted that accepts an array of numbers as a parameter and returns true if the array is in sorted order and false if not.

For example, if an array named $arr stores [1.5, 4.3, 7.0, 19.5, 25.1, 46.2], the call of is_sorted($arr) should return true. A one-element array is considered to be sorted.

Constraints:

  • You may assume the array has at least one element.
  • Do not modify the array passed in.
Function: Write a PHP function as described, not a complete program.

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