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$arr = array(
  "file" => array("file1.jpg", "file2.jpg", "file3.jpg", "file4.jpg"),
  "title" => array("title1", "title2", "title3", "title4")
);
foreach($arr['file'] as $i=>$r) {
  echo $arr['title'][$i]."=".$r;echo "<br />";
}

當碰到這樣的數組時 在loop中如何循環

 {loop $block2.file $key $file}
     <div class="item {if $key==0} active {/if}">
      <a href="{$block2[title][$key]}">  <img src="{dr_get_file($file)}" alt="keep" class="img-responsive" style="width: 100%"> </a>
      <div class="carousel-caption">        
      </div>
    </div>
{/loop}

loop實際上登錄foeach 想明白這點就好解決了