How is the in_array function used in PHP?

The in_array function is used to check if a value exists in an array.
Usage:
in_array(value to search for, array to search in, strict comparison)
Where the value to search for is a required parameter that specifies the value to search for.
The array to search in is a required parameter that specifies the array to search in.
The strict comparison is an optional parameter, defaulting to false. If set to true, the in_array function will use strict comparison (including data types), if set to false, it will use loose comparison (value only).

an array contains the value “apple”, the output will be “apple exists in the array”.