PHP - if a value exists in an array of objects

Question

I have an array of objects called $filtes which goes as follows:

What is the best practice to check if a word exists in $filters[$i]->title and $filters[$i]->subs[$j]->title. Speed is really important in this checking.

us1.php.net/in_array

nFinIt_loop
– nFinIt_loop

2014-04-24 14:03:53 +00:00
Commented Apr 24, 2014 at 14:03 — nFinIt_loop
– nFinIt_loop, Commented Apr 24, 2014 at 14:03

sroes · Accepted Answer · 2014-04-24 14:06:14Z

8

Create a simple recursive function:

function myArrayContainsWord(array $myArray, $word) {
    foreach ($myArray as $element) {
        if ($element->title == $word || 
            (!empty($myArray['subs']) && myArrayContainsWord($myArray['subs'], $word)) {
            return true;
        }
    }
    return false;
}

Then call it like this:

if (myArrayContainsWord($filtes, $title)) {
    ...
}

answered Apr 24, 2014 at 14:06

sroes

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2 Comments

Reza Baradaran Gazorisangi Over a year ago

could you please take a look at link, I'm kinda lost - Thanks

sroes Over a year ago

If you want to look for an ID instead of the title, you only have to change $element->title to $element->id

Clément Obry · Accepted Answer · 2017-12-15 15:43:19Z

2

I just upgraded the version of @zander-rootman, i added a field name option.

<?php
     function recursive_array_search($needle,$haystack, $field) {
          foreach($haystack as $key=>$value) {
                $current_key=$key;
                if($needle==$value->$field() OR (is_array($value->$field() ) && recursive_array_search($needle,$value->$field(),$field ) != false)) {
                      return true;
                }
          }
          return false;
      }

     // Example of use
     $result = recursive_array_search('2', $ressourceInfo->packs(), "idSubscription");
?>

answered Dec 15, 2017 at 15:43

Clément Obry

212 bronze badges

Comments

Zander Rootman · Accepted Answer · 2014-04-24 14:13:27Z

0

PHP in_array and/or PHP array_key_exists ... You're using a multi dimensional array however, so I'm not sure how extensively you want to search.

 <?php
function recursive_array_search($needle,$haystack) {
    foreach($haystack as $key=>$value) {
       $current_key=$key;
       if($needle===$value OR (is_array($value) && recursive_array_search($needle,$value) !== false)) {
            return $current_key;
        }
    }
    return false;
}

Found this function in the PHP docs: http://www.php.net/array_search

answered Apr 24, 2014 at 14:13

Zander Rootman

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