How to create a new array in php

Arrays are a common data type for PHP developers, they allow multiple values ​​to be stored in a single variable. In PHP, there are several ways to create and initialize arrays.

Create an empty array

To create an empty array, you can use the following syntax:

$myArray = array();

The above code creates an empty array named $myArray empty array.

Create a non-empty array

To create an array containing a set of values, you can use the following syntax:

$myArray = array('value1', 'value2', 'value3');

Alternatively, use the following syntax to create an associative array:

$myArray = array('key1' => 'value1', 'key2' => 'value2', 'key3' => 'value3');

In the above example, the $myArray variable contains a set of string values ​​or associated key-value pairs. You can use the same syntax and pass any data type to the array (e.g. integer, float, boolean, object, etc.).

If you already know the size of the array, you can use the following syntax to create an array with a specified size and default value:

$myArray = array_fill(0, 10, 'default_value');

The above code creates an array named $myArray an array with 10 elements and initialize each element to the default value default_value.

Summary

In PHP, creating an array is very easy. You can use an empty array to create an empty array, or you can use values ​​or associated key-value pairs to create a non-empty array. If you know the size of the array, the array_fill() function conveniently provides you with a way to create an array of a specific size and default value. Whenever you create an array, it is important to use the appropriate methods to help ensure that your code is correct and readable.

The above is the detailed content of How to create a new array in php. For more information, please follow other related articles on the PHP Chinese website!