Let's talk about several methods of storing values ​​in php arrays

Using arrays in PHP is very convenient, especially when dealing with multiple data. Specifically, an array is a data structure consisting of key-value pairs, where the keys are unique and can be numbers or strings and the values ​​can be any type of data.

In PHP, there are several ways to store values ​​in an array.

1. Using square bracket notation

Using square bracket notation is a simple way to pass keys and values ​​as arguments to square brackets.

For example:

$arr = array(); // 创建一个空数组

$arr['name'] = 'John';
$arr['age'] = 27;
$arr[0] = 'a';

In this example, we first create an empty array and add three keys to it with the key names 'name' and 'age' and a numeric key 0 items.

Please note that when adding a numeric key, PHP will automatically convert the number as the key name into a string. So, in this example, the number 0 is interpreted as the string '0'.

2. Using the array_push() function

The array_push() function can add one or more values ​​to the end of the array. It is called as follows:

array_push($array, $value1, $value2, ...);

For example:

$arr = array('apple', 'banana', 'orange');

array_push($arr, 'grape', 'kiwi');

After executing the above code, the array $arr will contain 'apple', 'banana', 'orange', 'grape' and 'kiwi 'These five elements.

3. Use the array_merge() function

The array_merge() function can merge two or more arrays into a new array:

$new_array = array_merge($array1, $array2, ...);

For example :

$arr1 = array('name' => 'John', 'age' => 27);
$arr2 = array('city' => 'New York');

$new_arr = array_merge($arr1, $arr2);

After executing the above code, the $new_arr array will contain the three elements 'John', 27 and 'New York'.

Summary

In PHP, you can easily handle multiple values ​​using arrays. Values ​​can be stored into arrays using square bracket notation, array_push() function, and array_merge() function. Just choose the appropriate method according to the actual situation.

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