Binary Search in PHP : Explain with Code Examples

Write a program to implement binary search in PHP. Given a sorted array, we have to write a PHP code to search an element using binary search algorithm.

Important points regarding binary search

i)  Binary search works with only sorted array.
ii) The time complexity of a binary search is O(logn).
iii) In binary search, we first calculate the mid value. After that we compare value needs to search to the middle element of an array. If a value matches with the middle element of an array then it’s index is returned otherwise the algorithm repeats if the value is less than or greater than the middle element.

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Binary Search in PHP

Binary Search in PHP

Binary Search in PHP – Code

We have created one binarySearch method which accept array and value to be searched in an array. If value is found in an array then it’s index is return otherwise we return -1.


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