How to add data to one-dimensional array in php

PHP array is a set of key-value pairs, where each value can be accessed by a unique key. In PHP, there are two types of arrays: one-dimensional arrays and multi-dimensional arrays. One-dimensional arrays have only one value, while multi-dimensional arrays can contain multiple arrays. This article will introduce how to add data to a one-dimensional array.

One-dimensional array is one of the most common types in PHP. Creating a one-dimensional array using PHP is very simple. Here are some examples:

// 创建一个空数组
$myArray = array();

// 创建一个带有值的数组
$myArray = array("apple", "banana", "orange");

Now, let’s say we want to add some new data to an existing one-dimensional array. We can do this using several built-in functions of PHP.

1. array_push() Function

array_push() The function adds one or more values ​​to the end of an array. Here is an example:

// 创建一个带有值的数组
$myArray = array("apple", "banana", "orange");

// 添加新的值到数组末尾
array_push($myArray, "grape", "mango");

// 打印新的数组
print_r($myArray);

The output of the above code is:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
    [3] => grape
    [4] => mango
)

2. [] Operator

in PHP , you can use the [] operator to add a new value to the end of the array. For example:

// 创建一个带有值的数组
$myArray = array("apple", "banana", "orange");

// 使用[]运算符添加新值
$myArray[] = "grape";
$myArray[] = "mango";

// 打印新的数组
print_r($myArray);

The output result of the above code is the same as the array_push() function:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
    [3] => grape
    [4] => mango
)

3. array_unshift() Function

If you need to add a new value at the beginning of the array, you can use the array_unshift() function. Here is an example:

// 创建一个带有值的数组
$myArray = array("apple", "banana", "orange");

// 在数组开头添加新值
array_unshift($myArray, "grape", "mango");

// 打印新的数组
print_r($myArray);

The output of the above code is:

Array
(
    [0] => grape
    [1] => mango
    [2] => apple
    [3] => banana
    [4] => orange
)

Summary

In PHP, one-dimensional arrays can be easily manipulated using one of these built-in functions Add new value to . No matter which method you choose, you can use the same syntax to access and manipulate new array elements.

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