什么是在PHP中過濾多維數組的最佳方法

Question

我想要pubsite_id = 8的所有數組是什么？ 我可以使用foreach來做到這一點，但是當它變得更大時，它似乎非常昂貴。

array(
  array( "startdate"    => "2014-02-01",
         "enddate"      => "2014-02-13",
         "pubsite_id"   => "1",
         "dfp_order_id" => "116260016",
         "amount"       => "-5000.00000",
         "amountperday" => -384.61538461538
  ),
  array( "startdate"    => "2014-02-01",
         "enddate"      => "2014-02-28",
         "pubsite_id"   => "8",
         "dfp_order_id" => "116260016",
         "amount"       => "-700.00000",
         "amountperday" => -25
  ),
  ...
)

Answer 1

根據@deceze的建議， array_filter是一種不錯的方法，它的性能和其他任何東西一樣好：

$filtered_arr = array_filter( $arr, function( $item ) {
  return $item["pubsite_id"] == "8";
} )

Answer 2

foreach($array as $value) 
{
    foreach($value as $key => $val) 
    {
      if($val['pubsite_id'] == "8") 
     {
       /*your stuff */
     }

   }
}