php - 比较php中两个数组的值

Question

我有两个数组，键是书本 ID(61、78、...等)

(1) book_width
     (
        [61] => 8.3
        [72] => 8286.1
        [78] => 6.4
        [100] => 8407.0
        [102] => 0.7
     )

---

(2) book_height
   (
    [61] => 9.00
    [72] => 150
    [78] => 8.00
    [100] => 150
    [102] => 3.00
  )

现在我想要一个数组，其中包含高度大于或等于宽度的书籍 ID

意味着我需要下面提到的数组

(2) book_dimension
       (     
 /*book id*/ [78] => 8.00 //along their height or width(anyone)
             [102] => 3.00
      )



 or only book id in a new array
    (2) book_dimension
           (     
            [0] => 78
            [1] => 102
      )

Answer 1

我相信这应该可以做到:

function compare_dimensions( $width, $height )
{
 return $height < $width;
}

$result = array_uintersect_assoc( $array_width, $array_height, 'compare_dimensions' );

var_dump( $result );

编辑:
哎呀:比较应该是相反的。 (将 >= 更改为 <)

文档:http://docs.php.net/array_uintersect_assoc