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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                present標簽用于判斷某個變量是否已經定義,用法: <present name="name"> name已經賦值 </present> <present name="name"> name已經賦值 </present> 如果判斷沒有賦值,可以使用: <notpresent name="name"> name還沒有賦值 </notpresent> <notpresent name="name"> name還沒有賦值 </notpresent> 可以把上面兩個標簽合并成為: <present name="name"> name已經賦值 <else /> name還沒有賦值 </present> <present name="name"> name已經賦值 <else /> name還沒有賦值 </present> present標簽的name屬性可以直接使用系統變量,例如: <present name="Think.get.name"> $\_GET\['name'\]已經賦值 </present> <present name="Think.get.name"> $\_GET\['name'\]已經賦值 </present> <div class="view-foot"> <div class="article-jump"> <span style="display: block;" class="jump-up">上一篇:<a href="/manual/thinkphp /1811" data-articleid="1811">IF標簽</a></span> <span class="jump-down">下一篇:<a href="/manual/thinkphp/1813" data-articlei d="1813">Empty標簽</a></span> </div> <a class="view-backtop"><i class="icon-arrow-up2"></i></a> </div> </div> <div class="view-foot"> <div class="article-jump"> <span style="display: block;" class="jump-up">上一篇:<a href="/manual/thinkphp /1811" data-articleid="1811">IF標簽</a></span> <span class="jump-down">下一篇:<a href="/manual/thinkphp/1813" data-articlei d="1813">Empty標簽</a></span> </div> <a class="view-backtop"><i class="icon-arrow-up2"></i></a> </div> </div>
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