How Can I Post Data Using PHP's `file_get_contents()`?

Posting Data via PHP's file_get_contents() Function

Problem:

When using file_get_contents() to fetch website content and process headers, certain URLs require data posting (e.g., login pages).

Solution Using stream_context:

To send HTTP POST requests using file_get_contents(), utilize the $context parameter as follows:

// Build the POST data as a query string
$postdata = http_build_query([
    'var1' => 'some content',
    'var2' => 'doh'
]);

// Create a stream context with HTTP options
$opts = [
    'http' => [
        'method' => 'POST',
        'header' => 'Content-Type: application/x-www-form-urlencoded',
        'content' => $postdata
    ]
];

// Create the stream context
$context = stream_context_create($opts);

// Send the HTTP POST request and retrieve the response
$result = file_get_contents('http://example.com/submit.php', false, $context);

This method utilizes streams to create a context with the necessary options, such as the HTTP method, headers, and POST data, and then supplies it to file_get_contents() to handle the request.

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