PHP array basics tutorial _ PHP Tutorial

PHP array basics tutorial. This article will give you a detailed introduction to the basic PHP Tutorial on PHP arrays. if you need to learn how to use php arrays, you can refer to it. What is an array? In this article, we will introduce you to the PHP basic Getting Started Tutorial on PHP arrays. if you need to learn how to use PHP arrays, please refer.

What is an array?
When using PHP for development, you need to create many similar variables either early or late.

Without many similar variables, you can store data as elements in an array.

All elements in the array have their own IDs, so they can be easily accessed.

There are three types of arrays:
Numeric array
Array with digit ID key
Join array
Each ID key in the array is associated with a value.
Multi-dimensional array
Array containing one or more arrays
Numeric array
Each element stored in the value array has a digital ID key.

You can use different methods to create a numeric array:

Example 1
In this example, the ID key is automatically assigned:

The code is as follows:
$ Names = array ("Peter", "Quagmire", "Joe ");

Example 2
In this example, we manually allocate the ID key:

The code is as follows:
$ Names [0] = "Peter "; $ Names [1] = "Quagmire "; $ Names [2] = "Joe"; these ID keys can be used in the script: $ Names [0] = "Peter "; $ Names [1] = "Quagmire "; $ Names [2] = "Joe "; Echo $ names [1]. "and". $ names [2]. "are". $ names [0]. "'s neighbors "; ?> Output of the above code: Quagmire and Joe are Peter's neighbors

Join array
Join array. each ID key is associated with a value.

It is not the best practice to use a numeric array to store data related to specific named values.

By associating arrays, we can use values as keys and assign values to them.

Example 1
In this example, we use an array to allocate ages to different people:

The code is as follows:
$ Ages = array ("Peter" => 32, "Quagmire" => 30, "Joe" => 34 );

Example 2
This example is the same as example 1, but shows another method to create an array:

The code is as follows:
$ Ages ['Peter '] = "32 "; $ Ages ['quagmire'] = "30 "; $ Ages ['job'] = "34 ";

You can use the ID key in the script:

The code is as follows:
$ Ages ['Peter '] = "32 "; $ Ages ['quagmire'] = "30 "; $ Ages ['job'] = "34 "; Echo "Peter is". $ ages ['Peter ']. "years old ."; ?> Output of the above script: Peter is 32 years old.

Multi-dimensional array
In a multi-dimensional array, each element in the main array is also an array. Each element in the sub-array can also be an array, and so on.

Example 1
In this example, we create a multidimensional array with an automatically assigned ID key:

The code is as follows:
$ Families = array ( "Griffin in" => array ( "Peter ", "Lois ", "Megan" ), "Quagmire" => array ( "Glenn" ), "Brown" => array ( "Cleveland ", "Loretta ", "Junior" ) ); If this array is output, it should be like this: Array ( [Griffin in] => Array ( [0] => Peter [1] => Lois [2] => Megan ) [Quagmire] => Array ( [0] => Glenn ) [Brown] => Array ( [0] => Cleveland [1] => Loretta [2] => Junior ) )

Example 2
Let's try to display a single value in the above array:

The code is as follows:
Echo "Is". $ families ['grigging'] [2]. "A part of the Griffin family? "; Output of the above code: Is Megan a part of the Griffin family?

PHP basic tutorial for arrays. if you need to learn how to use php arrays, refer. What is an array? Using PHP...