PHP Array Functions
PHP array functions are regular among the very important ones that interviewers select for candidates. For those who are unaware of PHP array, this is a data structure that allows developers to store multiple elements with similar data type under a single variable, which save developers the effort to create a different variable for every data. The PHP arrays functions are extremely helpful creating a list of elements of similar types, which developers will able to access using their key or index.
Types of arrays in PHP;
- Numeric or Indexed Arrays,
- Multidimensional Arrays
- Associative Arrays
Most Frequently Asked PHP Array Functions
The count() function is assuming that the indexes of your array go in order; by way of the usage of stop and prev to go the array pointer, you get the genuine values. Try the use of the count() method on the array above and it will fail.
$array = array(5,6,70,10,36,2);
echo $array[count($array) -2];
// OUTPUT : 36
Arrays help developers store multiple elements within a single variable that can be accessed using a key or an index. We can also combine it with for each statement to a quick loop through an array with the use of very little code. While web application development, we can store tabular data in a pair of nested arrays to achieve better performance and utility. PHP arrays functions also have various functions such as merge, sort, split and intersect which makes it easy for us to efficiently manipulate them. With the inefficiency of strong typing and OOP-object iteration support in PHP, arrays are the most preferable data structure to store and manipulate data. We will further continue here with top PHP Array interview questions picked by industry leaders with their suggested answers for your practice.