php以最快的方式搜索对象数组，找到针和索引

Question

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?

Answer 1

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
     )
);