如何用php搜索数组

Question

im trying to make a search function for my website, but i cannot get it to work. here is my code:

$search_string = "html documentation";
$search_string = explode(' ', $search_string);

$array = "


  Array (
    [0] => Array (
      [0] => 404
      [1] => notfound
      [2] => error
    )

    [1] => Array (
      [0] => 403
      [1] => forbidden
      [2] => error
    )

    [2] => Array (
      [0] => home
    )

    [3] => Array (
      [0] => hcjp
      [1] => html
      [2] => css
      [3] => js
      [4] => php
      [5] => learning
      [6] => documentation
    )

    [4] => Array (
      [0] => about
    )

    [5] => Array (
      [0] => search
      [1] => search on no conditions
    )

    [6] => Array (
      [0] => search
      [1] => search on label
    )
  )

";

$search_result = in_array($search_string, $array);
print_r($search_result);

i am not getting any output, my goal is to get some sort of path like: [3], so that i know that:

$search_result[3]

contains info the user requested.

thanks

Answer 1

One way to do it might be to loop the arrays in $array and use array_intersect. If there is a match then return the $key from $array

foreach ($array as $key => $a) {
    if (count(array_intersect($a, $search_string)) > 0) {
        echo $key;
    }
}

Demo