搜索在多维数组

Question

值键使用PHP的网站作为一个参考，我试图寻找已知值的关联数组的关键：

http://php.net/manual/en/function.array-search.php

下面的代码总是返回1，但假设返回120：

$location_key = array_search(1, array_column($locations, 'main')); 

的print_r（$位置）：

Array 
(
    [120] => Array 
     (
      [clientid] => 122103 
      [name] => HQ 
      [address] => 2013 BENSON GARDEN BLVD 
      [address2] => 
      [city] => OMAHA 
      [state] => NE 
      [zip] => 68134 
      [country] => UNITED STATES 
      [lat] => 00.000 
      [lng] => -0.0000 
      [taxrate] => 0 
      [main] => 1 
      [active] => 1 
      [contactid] => 14 
     ) 

    [122] => Array 
     (
      [clientid] => 122103 
      [name] => Branch 
      [address] => 515E E 72ND ST 
      [address2] => 
      [city] => NEW YORK 
      [state] => NY 
      [zip] => 10021 
      [country] => UNITED STATES 
      [lat] => 40.766705 
      [lng] => -73.952965 
      [taxrate] => 0 
      [main] => 0 
      [active] => 1 
      [contactid] => 0 
     ) 

) 

不确定为什么PHP的网站引用最高票数的“用户提交的注释”，这是行不通的。

Answer 1

这是因为array_column()不保留您的密钥。因此，您首先需要array_combine()密钥与array_column()的阵列，例如

$location_key = array_search(1, array_combine(array_keys($locations), array_column($locations, 'main')));