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Yaf_Response_Abstract::prependBody() is a method in the PHP framework Yaf (Yet Another Framework) that allows you to prepend content to the body of the response.

When you use this method, the content you provide will be inserted at the beginning of the response body, pushing the existing content (if any) further down. This is useful when you want to add additional information or modify the response body before it is sent back to the client.

Here's an example of how you can use Yaf_Response_Abstract::prependBody():

php
$response = new Yaf_Response_Http();
$response->setBody('Hello World!');
$response->prependBody('Prefix: '); // Prepend "Prefix: " to the body content
echo $response->getBody(); // Output: "Prefix: Hello World!"


In this example, we create a new Yaf_Response_Http object and set the initial body content to "Hello World!". We then call prependBody() to add the text "Prefix: " to the beginning of the body content. Finally, we output the modified body content using getBody().

Please note that this is just a simplified example, and the actual usage of Yaf_Response_Abstract::prependBody() may depend on your specific requirements and the context in which you are using the Yaf framework.