標籤：
老闆說：
我只要在文字框填1|3 ，那第1和第3個商品都要標註!
思考過程：
有了重要訊息1和3，而迴圈商品時$key按順序自動遞增，那麼只要key和資訊匹配的話，就判斷商品添加標註，這個可以把位置資訊做成位置數組，通過in_array判斷$key這個位置在不在位置數組裡，（實際中我們從1開始，而迴圈中從0開始，所以匹配時需要在$key上加1）
<!DOCTYPE html><html lang="en"><head> <meta charset="UTF-8"> <title>Document</title> <style type="text/css"> .box{border:1px solid #000;text-align:center;width:200px;height:200px;float:left;margin:10px;line-height:200px;} </style></head><body> <?php//位置文本$str="1|3";//通過|分割得出位置數組$markarr=$str? explode("|",$str):"";//商品組$arr=array( array("name"=>"productOne","price"=>10), array("name"=>"productTwo","price"=>20), array("name"=>"productThree","price"=>30), array("name"=>"productFour","price"=>40));//迴圈商品foreach($arr as $key =>$item){ echo ‘<div class="box">‘; if(in_array($key+1,$markarr)){ echo "此商品帶標註"; } echo ‘</div>‘;} ?></body></html>
php練習：給指定商品添加特殊效果
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