Array in PHP

In PHP, an array is a data structure that allows you to store multiple values in a single variable. Each value in an array is identified by a unique key or index. The key can be either numeric or a string, depending on the type of array.

PHP Supports Three Main Types of Arrays:

1. Indexed Arrays: In an indexed array, elements are stored with numeric indices. The first element has an index of 0, the second element has an index of 1, and so on.

   $numericArray = array("Apple", "Banana", "Orange");
   echo $numericArray[0];  // Outputs: Apple

    

2. Associative Arrays: In an associative array, elements are stored with named keys. Each element has a key-value pair, where the key is a string.

   $assocArray = array("name" => "John", "age" => 30, "city" => "New York");
   echo $assocArray["name"];  // Outputs: John

    

3. Multidimensional Arrays: A multidimensional array is an array that contains one or more arrays. It can be a combination of indexed and associative arrays.

   $multiArray = array(
       array("Apple", "Banana", "Orange"),
       array("name" => "John", "age" => 30),
       array(1, 2, 3)
   );
   echo $multiArray[0][0];  // Outputs: Apple
   echo $multiArray[1]["name"];  // Outputs: John

    

Arrays in PHP are dynamic, meaning you can easily add, modify, or remove elements during runtime. PHP provides a wide range of built-in functions for working with arrays, such as count(), array_push(), array_pop(), array_merge(), and many more.

Here's an example of adding an element to an array:

$fruits = array("Apple", "Banana", "Orange");
$fruits[] = "Grapes";  // Adds "Grapes" to the end of the array
print_r($fruits);  // Outputs: Array ( [0] => Apple [1] => Banana [2] => Orange [3] => Grapes )

Arrays are fundamental in PHP and are widely used for storing and manipulating data in various web applications.

Thank you.