How to assign values ​​to array elements in php

In PHP, array is a very common data structure. The elements of an array can be any type of data: numbers, strings, or even another array.

Assigning values ​​to array elements in PHP is very simple. You only need to call the array variable and element index, and then assign the value to the element. Here is an example:

// 定义一个数组
$arr = array("apple", "banana", "orange");

// 给索引为0的元素赋值
$arr[0] = "pear";

// 输出数组
print_r($arr);

In this example, we first define an array with three elements. Then, we assign the value "pear" to the element with index 0 (by default, the first element has index 0). Finally, we output the entire array using the print_r() function. Run this script and you should see the following output:

Array
(
    [0] => pear
    [1] => banana
    [2] => orange
)

As you can see, the value of the first element has changed to "pear".

We can also use another way to assign values ​​to the elements in the array, that is, use PHP's list() function to assign values ​​to multiple elements at once. Here is an example:

//定义包含两个元素的数组
$arr = array("apple", "banana");

//用list()函数为数组元素分配值
list($arr[0], $arr[1]) = array("orange", "pear");

//输出数组
print_r($arr);

In this example, we initially define an array with two elements. We then use the list() function with another array containing two elements to assign new values ​​to the elements of this array. Finally, we use the print_r() function to output the elements of this array. Run this script and you should see the following output:

Array
(
    [0] => orange
    [1] => pear
)

As you can see, we successfully assigned a new value to both elements of the array.

In addition to using array indexes to assign values ​​to elements, we can also use PHP's array_push() function to add a new element to the end of the array. Here is an example:

//定义一个包含两个元素的数组
$arr = array("apple", "banana");

//push一个新元素到数组末尾
array_push($arr, "orange");

//输出数组
print_r($arr);

In this example, we initially define an array with two elements. We then added a new element to the end of the array using the array_push() function. Finally, we use the print_r() function to output the elements of this array. Run this script and you should see the following output:

Array
(
    [0] => apple
    [1] => banana
    [2] => orange
)

As you can see, we successfully added a new element to the end of the array.

In general, assigning values ​​to array elements in PHP is a very intuitive and simple thing. Whether you assign values ​​by index, assign values ​​using the list() function, or add new elements using the array_push() function, you can freely manipulate the array in your program and store the values ​​you need.

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