How to use PHP's continuous array

In PHP, an array object is composed of a series of key-value pairs. When processing data, it is often necessary to traverse an array. In order to traverse the array more conveniently, PHP provides a variety of traversal methods, such as for loop and foreach loop. In this article, we will discuss how to use PHP's continuous arrays.

What is a continuous array?

In PHP, a continuous array is an array composed of a series of continuous numerical indexes. These numerical indexes start from 0 and increase in order, and each element is a value. Continuous array is the most basic array type and one of the most commonly used array types in PHP development.

How to create a continuous array

In PHP, it is very simple to create a continuous array. You can directly use the array () function to create an array, specifying the length of the array and the value of each element. For example, to create a contiguous array of five elements, you can use the following code:

$arr = array("apple", "orange", "banana", "pear", "grape");

The above code will create an array with five elements. Each element in the array is a value of string type, and their indexes are consecutive numbers, ranging from 0 to 4 respectively.

How to access a continuous array

It is very simple to access the elements of a continuous array. You can use the index operator [] to get the elements at the specified position in the array. For example, to get the first element in the above array, you can use the following code:

echo $arr[0]; //output "apple"

The above code will output the first element in the array.

How to traverse a continuous array

In PHP, it is very convenient to traverse a continuous array, which can be realized by using a for loop or a foreach loop. The following is an example code for iterating through a continuous array using a for loop:

for ($i=0; $i