How to check if a value exists in an array in PHP. In this tutorial, I am going to discuss PHP inbuilt and custom method to check if value exists in array.
PHP provides couple of in-built methods to check whether a value exists in an array or not. Methods such as in_array(), array_search() etc.
Let’s discuss, how we can use these methods as well as we write our own custom method to check if a value exists in an array.
PHP 5 introduced the concept of constructor. Constructors are magic method which call automatically when object is created. But when you define the constructor method both in Child and Parent class, it will not call until you explicitly reference it. So How to call parent class constructor in child class.
Given an unsorted array. How to find duplicates in array using PHP. These types of questions are generally asked in interviews. Sometimes interviewer allows to use in-built function sometimes not.