What are the alternatives to using a database for communication between PHP scripts?

When communication between PHP scripts is needed without using a database, one alternative is to use file-based communication. This involves writing data to a file in one script and reading it in another script. Another option is to use sessions to pass data between scripts, storing temporary information on the server. Additionally, you can utilize APIs or web services to exchange data between scripts. 

// File-based communication
// Script 1: Write data to a file
$data = "Hello, world!";
file_put_contents('data.txt', $data);

// Script 2: Read data from the file
$data = file_get_contents('data.txt');
echo $data;
```

```php
// Session-based communication
// Script 1: Set data in session
session_start();
$_SESSION['data'] = "Hello, world!";

// Script 2: Get data from session
session_start();
echo $_SESSION['data'];
```

```php
// API-based communication
// Script 1: Send data to API
$data = array('message' => 'Hello, world!');
$response = file_get_contents('https://api.example.com/send_data', false, stream_context_create(array(
    'http' => array(
        'method' => 'POST',
        'header' => 'Content-Type: application/json',
        'content' => json_encode($data)
    )
)));

// Script 2: Receive data from API
$response = file_get_contents('https://api.example.com/get_data');
$data = json_decode($response, true);
echo $data['message'];

Keywords

file system caching message queue shared memory API

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