How to create an array with key values ​​in php

In PHP, creating an array with keys is very simple. An array is essentially a data structure that allows you to store a set of values ​​as a single variable. Keyed arrays let you specify the keys you want to use in the array, making it easier to access and manipulate the data.

In PHP, there are several different ways to create a keyed array. Here are some of the methods:

Method 1: Use the array() function

To create a keyed array, you can use the array() function in PHP and specify each key-value pair.

For example, the following code creates an array with the keys "name" and "age":

$person = array("name"=>"John", "age"=>"30");

Method 2: Use square brackets [] syntax

You also You can use square bracket syntax to create a keyed array. The following is the sample code:

$person = [
    "name" => "John",
    "age" => "30",
];

Method 3: Insert key-value pairs one by one

You can also create arrays one by one by inserting one key-value pair at a time. This usually happens when adding data to an array.

For example, the following code adds a key named "city" to the array:

$person = array("name"=>"John", "age"=>"30");
$person["city"] = "New York";

In the above code, we first create a key with "name" and "age " array of keys, and then use square brackets [] syntax to add the "city" key to the array.

Method 4: Using the keyword array

You can also use the keyword array to construct a new array and specify each key and value.

The following is the sample code:

$person = array();
$person["name"] = "John";
$person["age"] = "30";

In the above code, we first create an empty array using the array() function, and then use the square brackets [] syntax for "name" and Value added for "age" key.

No matter which method you use, creating a keyed array is a very simple matter. They are very useful in Php programs, allowing you to access and manipulate data more conveniently.

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