There are several definitions of arrays in php

The types defined by PHP arrays include: Index array: Use numeric index to access elements. Associative array: Access elements using string keys. Multidimensional arrays: elements can be other arrays. Named arrays: Named constants as array keys in PHP 7.

Types of PHP array definitions

There are many types of array definitions in PHP:

1. Indexed Arrays

This is the most common array type, which uses numeric indexes to access elements.

<code class="php">$fruits = array("Apple", "Banana", "Orange");</code>

2. Associative Arrays

Also known as hash tables or maps, use string keys to access elements.

<code class="php">$person = array("name" => "John", "age" => 30);</code>

3. Multidimensional Arrays

The elements in the array can be other arrays to create multidimensional arrays.

<code class="php">$matrix = array(
    array(1, 2),
    array(3, 4)
);</code>

4. Named Arrays

Named arrays were introduced in PHP 7, which allows the definition of named constants as array keys.

<code class="php">const FRUITS = array("Apple", "Banana", "Orange");</code>

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