azure-storage-common/src/Common/Internal/Utilities.php
public static function appendToFile($path, $content)
    {
        $resource = @fopen($path, 'a+');
        if ($resource != null) {
            fwrite($resource, $content);
            fclose($resource);
        }
    }
public static function appendToFile($path, $content)
    {
        $resource = @fopen($path, 'a+');
        if ($resource != null) {
            fwrite($resource, $content);
            fclose($resource);
        }
    }
Append the content to file.
@param  string $path    The file to append to.
@param  string $content The content to append.

@return void