'1', "caption" => "一级菜单1"),   array("level" => '1',&"/>  '1', "caption" => "一级菜单1"),   array("level" => '1',&">

请问版主xuzuning

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Release: 2016-06-13 12:56:15
Original
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请教版主xuzuning

<br />
$ar = array (<br />
  array("level" => '1', "caption" => "一级菜单1"),<br />
  array("level" => '1', "caption" => "一级菜单2"),<br />
  array("level" => '2', "caption" => "二级菜单1"),<br />
  array("level" => '2', "caption" => "二级菜单2"),<br />
  array("level" => '3', "caption" => "三级菜单1"),<br />
  array("level" => '1', "caption" => "一级菜单3"),<br />
);<br />
print_r( foo($ar));<br />
<br />
function foo(&$ar, $level='1') {<br />
  $res = array();<br />
  while($r = current($ar)) {<br />
    if($r['level'] > $level) $res[count($res)-1]['sub'] = foo($ar, $r['level']);<br />
    elseif($r['level'] == $level) $res[] = $r;<br />
    else {<br />
      array_unshift($ar, $r);<br />
      break;<br />
    }<br />
    array_shift($ar);<br />
  }<br />
  return $res;<br />
}<br />
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在上面的代码中while($r = current($ar)) 是如何为true的,有点搞不明白


------解决方案--------------------
current($ar) 是取数组 $ar 的当前元素

只要不为空,就表示取到了。取到了当然就是 true 了
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