Insert an image into a post by API

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By using the code below, I can create a new post and upload an image to wordpress’s upload directory as a attachment through a form’s submitted data. 

    $new_post = array(
        'post_title' => $title,
        'post_content' => $content,
        'post_status' => 'publish',
        'post_date' => date('Y-m-d H:i:s'),
        'post_author' => $user_ID,
        'post_type' => 'post',
        'post_category' => array(3)
    );
    $post_id = wp_insert_post($new_post);

    if (!function_exists('wp_generate_attachment_metadata')){
        require_once(ABSPATH . "wp-admin" . '/includes/image.php');
        require_once(ABSPATH . "wp-admin" . '/includes/file.php');
        require_once(ABSPATH . "wp-admin" . '/includes/media.php');
    }
    if ($_FILES) {
        foreach ($_FILES as $file => $array) {
            if ($_FILES[$file]['error'] !== UPLOAD_ERR_OK) {
                return "upload error : " . $_FILES[$file]['error'];
            }
            $attach_id = media_handle_upload( $file, $post_id );
        }   
    }

I want to insert an image to post, not replace the featured image so set_post_thumbnail() function is not appropriate. I found that if I manually insert an image to post, it will generated the HTML code likes:

Read More
<a href="http://192.168.1.12/wp/wp-content/uploads/2012/09/H530U_08.jpg"><img class="alignnone size-medium wp-image-136" title="HARP_SH530U_0" src="http://192.168.1.12/wp/wp-content/uploads/2012/09/HARP_SH530U_08-300x167.jpg" alt="" width="300" height="167" /></a>

So which API would provide the function of inserting image to post, likes generating the HTML code above and not replacing the featured image?

Thanks

Post Views: 2

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1 comment

  1. You can set the uploaded image as the post thumbnail via,

    update_post_meta($post_id,'_thumbnail_id',$attach_id);

    Example…

    if ($_FILES) {
    foreach ($_FILES as $file => $array) {
        if ($_FILES[$file]['error'] !== UPLOAD_ERR_OK) {
            return "upload error : " . $_FILES[$file]['error'];
        }
        $attach_id = media_handle_upload( $file, $post_id );
    }   
}

update_post_meta($post_id,'_thumbnail_id',$attach_id);

    If you are uploading an array of images, then you might wish to specify which image by referencing the key,

    $file[0] //for the first image in the array
$file[1] //for the second image in the array
$file[2] //for the third image in the array
etc...

    …but that should not be necessary when uploading a single image.

    Update:

    Based on your comments, if you want to insert the image at the beggining of or before your post content its probably best you filter the the_content function like so,

    add_filter( 'the_content', 'insert_img_to_post', 20 );

function insert_img_to_post( $content ) {

    global $post;
    $post_id = $post->ID;

    if ( is_single() )

        $content = sprintf(
            '<img class="post-icon" src="%s" alt="Post icon" title=""/>',
            wp_get_attachment_url(get_post_meta( $post_id, '_thumbnail_id', true )),
            $content
        );

    return $content;
}

    …add this function as a separate function/filter in your functions.php file. Do not try and bundle it within your wp_insert_post function as it will not work. This is intended to run by itself, hooking onto the_content filter, inserting the image at the top of the post before the content, then appending the content beneath it.

    This is currently running on a single post page (is_single) if you want it to run on something else, like a page, then change to is_page or any other conditional tag that meets your needs.