搜索页调用数据，为什么有些图片调用出不来但是标题和链接却出来了，直接用的官方的代码

                            <ul>
                                <!--调用MOD_DIR模块的数据 id和total和order参数(本页面固有参数) page=1标示开启分页 urlrule分页地址规则 pagesize每页数量-->
                                {search module=MOD_DIR id=$searchid total=$sototal order=$params.order catid=$catid page=1 pagesize=10 urlrule=$urlrule}
                                <li class="search-item clearfix">
                                    <a title="{$t.title}" href="{$t.url}">
                                        <img src="{dr_thumb($t.thumb, 100, 90)}" width="100" height="90" style="margin-top: 15px;">
                                    </a>
                                    <div class="search-content text-left">
                                        <h4 class="search-title">
                                            <a title="{$t.title}" href="{$t.url}">{$t.title}</a>
                                        </h4>
                                        <p class="search-desc">{$t.description}</p>
                                        <div class="search-post-foot">
                                            <ul class="search-post-tags">
                                                {php $kw=@explode(',', $t.keywords);}
                                                {loop $kw $a}
                                                {if $a}
                                                <li class="uppercase">
                                                    <a href="{dr_get_tag_url($a, MOD_DIR)}" target="_blank">{$a}</a>
                                                </li>
                                                {/if}
                                                {/loop}
                                            </ul>
                                            <div class="search-post-meta">
                                                <i class="fa fa-calendar font-blue"></i>
                                                <a href="javascript:;">{$t.updatetime}</a>
                                            </div>
                                            <div class="search-post-meta">
                                                <i class="fa fa-eye font-blue"></i>
                                                <a href="javascript:;">{$t.hits}</a>
                                            </div>
                                            <div class="search-post-meta">
                                                <i class="fa fa-comments font-blue"></i>
                                                <a href="javascript:;">{$t.comments}</a>
                                            </div>
                                        </div>
                                    </div>
                                </li>
                                {/search}
                            </ul>