doucheyi1347 2016-04-11 20:05
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php以最快的方式搜索对象数组,找到针和索引

PHP version: 5.3

In Wordpress, I have an array of all the posts in a category having this format.

array
  0 => 
      public 'ID' => int 360
      public 'post_title' => string 'Batman v Superman: Dawn of Justice' 
  1 => 
      public 'ID' => int 371
      public 'post_title' => string 'Star Wars: Episode VII - The Force Awakens'
... =>

Knowing the 'post_title' of the current post, what is the most efficient way using "post_title" as a needle to search the array and find it's index?

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  • dongqie5529 2016-04-11 20:12
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    PHP 7+

    Native functions are usually the fastest because they can be optimized inside the PHP interpreter:

    array_search($post_title, array_column($yourArray, 'post_title'));
    

    array_column is turning your array of objects into a simple array of index => post title. array_search is then scanning that array for the index matching the title you are searching for.


    PHP 5.3

    PHP 5.3 is unsupported and should no longer be used, but if you have no choice, array_column is not available, so I would use:

    array_search($post_title, 
         array_map(function($object) {
                 return $object->post_title;
             },
             $yourArray
         )
    );
    
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