Process WordPress image uploads

process-wp-image-uploads.php

// now upload the new images
$postvals = cp_process_new_image($_POST['ad_id']);

// associate the already uploaded images to the ad and create multiple image sizes
$attach_id = cp_associate_images($_POST['ad_id'], $postvals['attachment']);

//process each image thats being uploaded
function cp_process_new_image() {
    global $wpdb;
    $postvals = '';

    for ( $i=0; $i < count( $_FILES['image']['tmp_name'] ); $i++ ) {
        if ( !empty($_FILES['image']['tmp_name'][$i]) ) {
            // rename the image to a random number to prevent junk image names from coming in
            $renamed = mt_rand( 1000,1000000 ).".".appthemes_find_ext( $_FILES['image']['name'][$i] );

            //Hack since WP cant handle multiple uploads as of 2.8.5
            $upload = array( 'name' => $renamed,'type' => $_FILES['image']['type'][$i],'tmp_name' => $_FILES['image']['tmp_name'][$i],'error' => $_FILES['image']['error'][$i],'size' => $_FILES['image']['size'][$i] );

            // need to set this in order to send to WP media
            $overrides = array( 'test_form' => false );

            // check and make sure the image has a valid extension and then upload it
            $file = cp_image_upload( $upload );

            if ( $file ) // put all these keys into an array and session so we can associate the image to the post after generating the post id
                $postvals['attachment'][$i] = array( 'post_title' => $renamed,'post_content' => '','post_excerpt' => '','post_mime_type' => $file['type'],'guid' => $file['url'], 'file' => $file['file'] );
        }
    }
    return $postvals;
}

// make sure its an image file and then upload it
function cp_image_upload($upload) {
    if ( cp_file_is_image( $upload['tmp_name'] ) ) {
        $overrides = array( 'test_form' => false );
        // move image to the WP defined upload directory and set correct permissions
        $file = wp_handle_upload( $upload, $overrides );
    }
    return $file;
}

function cp_file_is_image($path) {
    $info = @getimagesize($path);
    if (empty($info))
        $result = false;
    elseif (!in_array($info[2], array(IMAGETYPE_GIF, IMAGETYPE_JPEG, IMAGETYPE_PNG)))
        $result = false;
    else
        $result = true;

    return apply_filters('cp_file_is_image', $result, $path);
}

// this ties the uploaded files to the correct ad post and creates the multiple image sizes.
function cp_associate_images($post_id,$file,$print = false) {
    $image_count = count($file);
	if($image_count > 0 && $print) echo __('Your ad images are now being processed...','appthemes').'<br />';
    for ($i=0; $i < count($file);$i++ ) {
        $post_title = esc_attr( get_the_title( $post_id ) );
        $attachment = array( 'post_title' => $post_title, 'post_content' => $file[$i]['post_content'], 'post_excerpt' => $file[$i]['post_excerpt'], 'post_mime_type' => $file[$i]['post_mime_type'], 'guid' => $file[$i]['guid'] );
        $attach_id = wp_insert_attachment( $attachment, $file[$i]['file'], $post_id );

        // create multiple sizes of the uploaded image via WP controls
        wp_update_attachment_metadata( $attach_id, wp_generate_attachment_metadata($attach_id, $file[$i]['file']) );

		if($print) echo sprintf(__('Image number %1$d of %2$s has been processed.','appthemes'), $i+1, $image_count).'<br />';

        // this only does a specific resize.
        // image_make_intermediate_size($file, $width, $height, $crop=false)
        // $crop Optional, default is false. Whether to crop image to specified height and width or resize.
        //wp_update_attachment_metadata($attach_id, image_make_intermediate_size($file[$i]['file'], 50, 50, true));
        //wp_update_attachment_metadata($attach_id, image_make_intermediate_size($file[$i]['file'], 25, 25, true));
    }
}