How Can I Submit HTTP POST Data Using file_get_contents() in PHP?

HTTP POST Data Submission with file_get_contents()

Challenge:

Many URLs require data posting for interaction, such as login pages. However, the file_get_contents() function does not inherently support data submission.

Solution:

To resolve this, PHP employs stream contexts, which allow for HTTP POST data submission within file_get_contents().

Implementation:

Utilizing stream contexts, you can configure the request behavior:

$postdata = http_build_query(
    ['var1' => 'some content', 'var2' => 'doh']
);

$opts = [
    'http' => [
        'method'  => 'POST',
        'header'  => 'Content-Type: application/x-www-form-urlencoded',
        'content' => $postdata
    ]
];

$context = stream_context_create($opts);

$result = file_get_contents('http://example.com/submit.php', false, $context);

In this example:

• $postdata contains the data to be submitted.
• $opts defines the stream options, including the POST method, appropriate headers, and data payload.
• $context is the stream context created with the specified options.
• file_get_contents() retrieves the response using the custom context.

Alternative Method:

Alternatively, consider using cURL, which offers more extensive customization options and is commonly used for handling HTTP POST requests.

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