How to Post Multidimensional Arrays Effectively Using PHP and CURL?

Posting Multidimensional Arrays Using PHP and CURL

In web development, scenarios may arise where you need to submit form data containing multidimensional arrays to a remote script via CURL. However, this task can present challenges due to limitations in CURL's handling of multidimensional arrays.

To address this, consider the following solution:

Converting Arrays to a Suitable Format

The crux of the issue lies in the need to maintain the multipart/form-data Content-Type header while sending a file along with the form data. This requirement restricts the use of query strings or http_build_query() functions.

To overcome this limitation, we can utilize a custom function called http_build_query_for_curl. This function recursively traverses multidimensional arrays, converting them into a format compatible with CURL's CURLOPT_POSTFIELDS parameter.

Example Implementation

An example implementation of the http_build_query_for_curl function is provided below:

<code class="php">function http_build_query_for_curl( $arrays, &$new = array(), $prefix = null ) {

    if ( is_object( $arrays ) ) {
        $arrays = get_object_vars( $arrays );
    }

    foreach ( $arrays AS $key => $value ) {
        $k = isset( $prefix ) ? $prefix . '[' . $key . ']' : $key;
        if ( is_array( $value ) OR is_object( $value )  ) {
            http_build_query_for_curl( $value, $new, $k );
        } else {
            $new[$k] = $value;
        }
    }
}

$arrays = array(
    'name' => array(
        'first' => array(
            'Natali', 'Yura'
        )
    )
);


http_build_query_for_curl( $arrays, $post );

print_r($post);</code>

By leveraging this function, you can effectively post multidimensional arrays via CURL while maintaining the required Content-Type header.

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