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                用法示例: <if condition="($name eq 1) OR ($name gt 100) "> value1 <elseif condition="$name eq 2"/>value2 <else /> value3 </if> <if condition="($name eq 1) OR ($name gt 100) "> value1 <elseif condition="$name eq 2"/>value2 <else /> value3 </if> 在condition屬性中可以支持eq等判斷表達式,同上面的比較標簽,但是不支持帶有”>”、”<”等符號的用法,因為會混淆模板解析,所以下面的用法是錯誤的: <if condition="$id < 5 ">value1 <else /> value2 </if> <if condition="$id < 5 ">value1 <else /> value2 </if> 必須改成: <if condition="$id lt 5 ">value1 <else /> value2 </if> <if condition="$id lt 5 ">value1 <else /> value2 </if> 除此之外,我們可以在condition屬性里面使用php代碼,例如: <if condition="strtoupper($user\['name'\]) neq 'THINKPHP'">ThinkPHP <else /> other Framework </if> <if condition="strtoupper($user\['name'\]) neq 'THINKPHP'">ThinkPHP <else /> other Framework </if> condition屬性可以支持點語法和對象語法,例如: 自動判斷user變量是數組還是對象 <if condition="$user.name neq 'ThinkPHP'">ThinkPHP <else /> other Framework </if> <if condition="$user.name neq 'ThinkPHP'">ThinkPHP <else /> other Framework </if> 或者知道user變量是對象 <if condition="$user:name neq 'ThinkPHP'">ThinkPHP <else /> other Framework </if> <if condition="$user:name neq 'ThinkPHP'">ThinkPHP <else /> other Framework </if> 由于if標簽的condition屬性里面基本上使用的是php語法,盡可能使用判斷標簽和Switch標簽會更加簡 潔,原則上來說,能夠用switch和比較標簽解決的盡量不用if標簽完成。因為switch和比較標簽可以使用變量調節器和系統變量。如果某些特殊的要求下面,IF標簽仍然無法滿足要求的話,可以使用原生php代碼 或者PHP標簽來直接書寫代碼。 <div class="view-foot"> <div class="article-jump"> <span style="display: block;" class="jump-up">上一篇:<a href="/manual/thinkphp /1810" data-articleid="1810">范圍判斷標簽</a></span> <span class="jump-down">下一篇:<a href="/manual/thinkphp/1812" data-articlei d="1812">Present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 /1810" data-articleid="1810">范圍判斷標簽</a></span> <span class="jump-down">下一篇:<a href="/manual/thinkphp/1812" data-articlei d="1812">Present標簽</a></span> </div> <a class="view-backtop"><i class="icon-arrow-up2"></i></a> </div> </div>
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