in_array函数不工作

Question

我有一个XML文件，我读入PHP数组进行处理，使用CakePHP的XML :: toArray（$ xmlString）函数。

一切工作正常，我可以轻松地处理数据，但是，当我尝试运行in_array检查时，即使我知道该值是否存在，它仍会继续返回false。

这里的if语句：

$xmlArray = Xml::toArray($xmlString); 
$menus = $xmlArray['navigation']; 
$groupId = array($groupId); // Group ID of logged in user, in my case 1 
$loggedInId = array($loggedInId); // User ID, in my case 182 
//I change them both into arrays, as the second param needs to be an array, and in the XML file, there could only be one value, in which case it's "translated" as a string 
//$submenu == foreach($menu['submenu']['menu'] as $subenu) 
if(in_array($submenu['permission']['group'],$groupId) || in_array($submenu['permission']['user'],$loggedInId)) { 
    //do stuff 
} 

这里的XML文件（导航比特）：

<?xml version="1.0" encoding="utf-8"?> 
<navigation> 
    <menu> 
     <title>Home</title> 
     <url>home</url> 
     <submenus> 
      <menu> 
       <title>In memory of...</title> 
       <url>memoriams</url> 
       <image>memoriam</image> 
       <permission> 
        <group>1</group> 
        <user>0</user> 
       </permission> 
      </menu> 
      <menu> 
       <title>Reports</title> 
       <url>reports</url> 
       <image>report</image> 
       <permission> 
        <group>4</group> 
        <group>5</group> 
        <user>252</user> 
        <user>182</user> 
        <user>234</user> 
       </permission> 
      </menu> 
     </submenus> 
    </menu> 
</navigation> 

菜单仅在第一种情况下显示出来。这是如果组/用户只有1个值。如果它有多个值，它只是不显示子菜单。

这里是阵列的调试：

array(
    'menu' => array(
     'title' => 'Home', 
     'url' => 'home', 
     'submenus' => array(
      'menu' => array(
       (int) 0 => array(
        'title' => 'In memory of...', 
        'url' => 'memoriams', 
        'image' => 'memoriam', 
        'permission' => array(
         'group' => '1', 
         'user' => '0' 
        ) 
       ), 
       (int) 1 => array(
        'title' => 'Reports', 
        'url' => 'reports', 
        'image' => 'report', 
        'permission' => array(
         'group' => array(
          (int) 0 => '4', 
          (int) 1 => '5' 
         ), 
         'user' => array(
          (int) 0 => '252', 
          (int) 1 => '182', 
          (int) 2 => '234' 
         ) 
        ) 
       ) 
      ) 
     ) 
    ) 
) 

没有人有任何想法，为什么它不想工作？

Answer 1

功能in_array的第一个参数是needle，第二个参数是array来搜索匹配！

参考：PHP Manual

Answer 2

foreach ($menu['menu']['submenus']['menu'] as $submenu) { 
    $group = $submenu['permission']['group']; 
    $user = $submenu['permission']['user']; 
    if(in_array($group, (array) $groupId) || in_array($user, (array) $loggedInId)) { 
    //do stuff 
    } 
}