if语句不正确[关闭]

Question

I have a associative array, when i'm looping the array i try to make a statement which output an incorrect answer.

foreach($search as $a=>$b)
{ 
  foreach($b as $c) {

      if($b == 'folder')
      {
        print_r($b);
        $dir = true;
      }
  }
}   

The following code outputs 0 and 'folder'. When $b equals 0 it is incorrect because $b is supposed to match 'folder'.

print_r of $search

array (size=3)
  'status' => string 's_search' (length=8)
  'files' => 
    array (size=1)
      'file' => 
        array (size=2)
          0 => 
            array (size=3)
              ...
          1 => 
            array (size=3)
              ...
  'folders' => 
    array (size=1)
      'folder' => 
        array (size=3)
          'id' => string '1081483096' (length=10)
          'name' => string 'asdf' (length=4)
          'match_type' => 
            array (size=3)
              ...

Answer 1

Here $b is an array. So, before loop you should check whether it is an array or not like,

foreach($search as $a=>$b)
{ 
    if(is_array($b) and !empty($b))
    {
       foreach($b as $c) {
          //your code
       }
    }
    elseif(is_string($b) and $b=='folder')
    {
        print_r($b);
        $dir = true;
    }
}