PHP custom_fields::upload_image_set_both示例

 public function save()
 {
     if (isset($_POST['delete_' . $this->name])) {
         $last_data = get_post_meta($this->post_id, $this->name, true);
         if ($last_data == "") {
             $last_data = false;
         }
         if ($last_data !== false) {
             custom_fields::remove_image($this->field['directory'], $last_data);
             update_post_meta($this->post_id, $this->name, "");
         }
     }
     if (isset($_FILES[$this->name])) {
         $file = $_FILES[$this->name];
         $make_circular = isset($this->field['make_circular']) ? $this->field['make_circular'] : false;
         $data = custom_fields::upload_image_set_both($file, $this->field['directory'], $this->field['width'], $this->field['height'], $make_circular);
         $wp_upload_dir = wp_upload_dir();
         $directory_used = $wp_upload_dir['url'] . '/' . $this->field['directory'];
         if (strlen($data) > 0) {
             update_post_meta($this->post_id, $this->name, $data);
             update_post_meta($this->post_id, $this->name . '_dir', $directory_used);
         }
         unset($_FILES[$this->name]);
     }
 }