根据您的静态内容和广告内容，我可能会创建一个自定义帖子类型，添加一个广告帖子和一个静态内容帖子，然后使用@birgire post injector class 在你需要的地方注意这两个帖子的注入。您可能需要稍微更改喷油器类以满足您的确切需要。

我很快编写了一个更通用的类（，它非常基础，您应该扩展它），您可以使用它在需要的地方注入任何类型的字符串内容。您可以（必须）根据需要对其进行改进/修改。请注意，没有进行数据清理或验证，因此您希望根据您的确切需要来处理这些问题

class MultiInjector
{
    /**
     * @var array $specialContent;
     * @access protected     
     * @since 1.0.0
     */
    protected $specialContent;

    /**
     * @var array $specialContent;
     * @access protected     
     * @since 1.0.0
     */
    protected $arrayValues;

    /**
     * @var array $pairs;
     * @access protected     
     * @since 1.0.0
     */
    protected $pairs;

    /**
     * Constructor
     *
     * @param array $specialContent; = []
     * @since 1.0.0
     */         
    public function __construct( $specialContent = [] )
    {
        $this->specialContent = $specialContent;
    }

    public function init()
    {
        add_action( \'the_post\', [$this, \'thePost\'] );       
    }

    /**
     * Protected method specialContentValidated()
     *
     * Make sure we have post positions, if not, set defauls. Also, reset
     * all array keys to numeric values
     *
     * @since 1.0.0
     */ 
    protected function specialContentValidated()
    {
        $arrayValues = false;

        if (    $this->specialContent 
             && is_array( $this->specialContent )
        ) {
            $arrayValues = array_values( $this->specialContent );
            // Loop over the array of special content and set defaults if no custom values exist
            foreach ( $arrayValues as $key=>$value ) {
                $defaults = [
                    \'content\'      => \'This is default content, make sure to set your own\',
                    \'postPosition\' => $key
                ];
                $arrayValues[$key] = wp_parse_args( $value, $defaults );
            }
        }
        $this->arrayValues = $arrayValues;
    }

    /**
     * Protected method positions()
     *
     * Save an array of $key/postPosition pairs
     *
     * @since 1.0.0
     */ 
    protected function positions()
    {
        $this->specialContentValidated();

        $pairs = false;

        if ( $this->arrayValues ) {
            foreach ( $this->arrayValues as $key=>$value )
                $pairs[$key] = $value[\'postPosition\'];
        }

        $this->pairs = $pairs;
    }       

    public function thePost()
    {
        // Make sure this is the main query, if not, bail
        if ( !in_the_loop() )
            return;

        $this->positions();

        // Make sure we have special content to add, if not bail
        if ( false === $this->arrayValues )
            return;

        // Set a static post counter to count the amount of posts
        static $postCount = 0;

        // Search for the post position in the $this->pairs array 
        $position = array_search( $postCount, $this->pairs );
        if ( false !== $position ) {
            // Everything checks out, display our custom content
            echo $this->arrayValues[$position][\'content\'];
        }

        // Update the counter 
        $postCount++;
    }
}

add_action ( \'wp\', function ()
{
    $args = [
        0 => [
                \'content\' => \'This is my content\',
                \'postPosition\' => 4
            ],
        1 => [
                \'content\' => \'This is my other content\',
                \'postPosition\' => 6
            ]
    ];
    $q = new MultiInjector( $args );
    $q->init();
});