WordPress SMS API integration without plugin error

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I would suggest using the HTTP API that WordPress provides for this purpose. Take a look at the GETting data from an API section for more details on how to get the data from your URL.

To get started, try:

  • Navigate to your wp-config.php file, and set the WP_DEBUG and WP_DEBUG_LOG constants to true (do NOT do this on the production server of your site).

  • Next, replace your code with the following:

    function mysite_woocommerce_order_status_processing( $order_id ) {

    $billing_phone = "0729424391"; // TODO Sanitize this input
    $message = "yep"; // TODO Sanitize this input
    $url = sprintf( "http://realcam.club:9710/http/send-message?username=admin&password=admin&to=%1$s&messagetype=sms.automatic&message=%2$s", $billing_phone, $message );

    try {

        // GET the response.
        $response = wp_remote_get( esc_url( $url ) );

        // If the response is a WP_Error object, jump to the catch clause.
        if ( is_wp_error( $response ) ) {
            throw new UnexpectedValueException( $response->get_error_message() );
        }

        // Log the successful response to the debug log.
        error_log( print_r( $response, true ) );

    } catch ( UnexpectedValueException $e ) {

        // Log the error to the debug log.
        error_log( $e );

    }


}
add_action( "woocommerce_order_status_processing", "mysite_woocommerce_order_status_processing" );

    and check what’s in the debug.log file in the wp-content directory of your WordPress installation.

This code will log the response or, if the request was unsuccessful, an error message to that file. I think it is straightforward enough for you to understand, but if you do have any questions or if anything goes wrong, please let me know.