How to store array into array in php

PHP is a popular server-side scripting language used for developing web applications. It has an easy-to-learn and use syntax, integrates with multiple database systems such as MySQL and Oracle, and provides a powerful standard library. A common PHP programming task is to store an array into another array. In this article, we'll explore how to accomplish this task.

First, we need to understand what an array is. In PHP, an array is a special variable type used to store multiple values. These values ​​can be of any type, including integers, strings, booleans, functions, etc. Each value in the array has a corresponding key that identifies that value. The keys can be integers or strings.

The basic syntax for creating an array is as follows:

$array = array(value1, value2, value3, ...);

This will create a new array containing the specified value. For example, the following code will create an array containing three integer values:

$array = array(1, 2, 3);

Now, let's see how to store one array into another array. Suppose we have two arrays, $array1 and $array2. We want to store $array2 into $array1 so that their values ​​can be accessed simultaneously. There are two ways to accomplish this task.

The first method is to use the array_merge() function. This function combines two or more arrays into a single array. The following is sample code to merge $array2 into $array1 using the array_merge() function:

$array1 = array(1, 2, 3);
$array2 = array('a', 'b', 'c');
$result = array_merge($array1, $array2);
print_r($result);

This will output the following:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => a
    [4] => b
    [5] => c
)

As you can see, all the items in $array1 and $array2 The values ​​are now contained in the $result array.

The second method is to use the " " operator. This operator merges two arrays into a new array, but retains only their unique keys and values ​​from the first array. The following is sample code to add $array2 to $array1 using the " " operator:

$array1 = array('a' => 1, 'b' => 2, 'c' => 3);
$array2 = array('d' => 4, 'e' => 5, 'f' => 6);
$result = $array1 + $array2;
print_r($result);

This will output the following:

Array
(
    [a] => 1
    [b] => 2
    [c] => 3
    [d] => 4
    [e] => 5
    [f] => 6
)

As you can see, all of the items in $array1 and $array2 The values ​​are now all contained in the $result array, but only the unique keys and values ​​in $array1 are retained. If there are duplicate keys in $array2 as in $array1, they will not be merged.

Those are the two methods of how to store one array into another array. Depending on your specific needs, you can choose which method to use. No matter which method you choose, PHP's powerful standard library and easy-to-learn syntax will help you complete your task with ease.

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