In this tutorial, you shall learn how to find the index of last occurrence of a specific value in given array in PHP using array_reverse() and array_search() functions, with the help of example programs.

PHP – Find index of last occurrence of value in array

To find the index of last occurrence of specific value in given array in PHP, we can use array_reverse() and array_search() functions.

array_reverse() function reverse the order of elements in the array, and array_search() function finds the index of the first occurrence of the value.

Since the array is reversed first, if we adjust the index returned by array_search() for reversing the array in first place, we get the index of last occurrence of the value in array.

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Example

In this example, we take an array arr with some string values. We find the index of last occurrence of the value "apple" in the array using array_reverse() and array_search() functions.

PHP Program

<?php
  $arr = ["apple", "banana", "apple", "cherry"];
  $value = "apple";

  $temp_index = array_search($value, array_reverse($arr));
  $index = count($arr) - $temp_index - 1;

  print_r("Last index : " . $index);
?>

Output

PHP - Find index of last occurrence of value in array

Conclusion

In this PHP Tutorial, we learned how to find the index of last occurrence of a specific value in given array using array_reverse() and array_search() functions.